International Journal of Environment and Waste Management (76 papers in press)

Regular Issues

• A CHOICE MODELING STUDY FOR A SANITARY LANDFILL IN MALAYSIA: CASE OF KOTA BHARU, KELANTAN  
  by Nik Nor Rahimah Nik Ab Rahim, Jamal Othman 
  Abstract: Environmental impacts from poor landfilling practice have been a long-time concern in Kota Bharu, a populated city in Peninsula Malaysia. This requires a sustainable disposal solution, a sanitary landfill, but such a project can turn into a failure without household demand side information. This study investigated the willingness of households to pay for a sanitary landfill by employing a survey-based method known as choice modelling. This is used to obtain the willingness of households to pay towards the environmental benefits of a sanitary landfill described by attributes of controlled leachate discharge, reduced intensity of bad odour, reduced disease vector and promotion of a scenic view. The resulting estimates show positive willingness to pay for each attribute (ranging from RM2.12 to RM12.61) and for the sanitary landfill (ranging from RM7.62 to RM10.41). The gathered information benefits policymakers to make decisions that match the demands of households so as to avoid the likelihood of opposition and project infeasibility.
  Keywords: non-market valuation; choice modelling; sanitary landfill; solid waste disposal.
  DOI: 10.1504/IJEWM.2022.10042085
   
  
• An In-depth Literature Review of End-of-Life Vehicle Management  
  by Rakesh Shrivastava, Gajanan Badwe, R.P. Mohanty, Gunjan Yadav 
  Abstract: The automotive industry has been a major contributor to the economic growth across the globe. However, the industry has struggled to tackle end-of-life vehicle management issues, which have impacted strongly the sustainability aspects of the products. The purpose of this paper is to classify the research papers, identify the research gaps and discover the future research directions in end-of-life vehicle (ELV) management. The study covers an analysis of recent literature published from 2000 to 2020. A total of 261 articles are analysed and classified into themes; such as ELV management practices, ELV legislation, ELV recovery strategies, automotive shredder residue (ASR), environmental impacts, and ELV economics. The study has utility for the auto manufacturers, auto users, academicians and researchers engaged in the field of ELV management to develop a better understanding of the issues and contribute to sustainable development.
  Keywords: end-of-life vehicle management; recycling; environmental impacts; economics; sustainability; automotive industry.
  DOI: 10.1504/IJEWM.2022.10042089
   
  
• Profile modelling of solid waste generation of non-household establishments in Butuan City
  by Jan Nino G. Tinio, Breix Michael G. Agua 
  Abstract: This study focused on the solid waste generation of establishments in Butuan City, Agusan del Norte. It aimed to determine some factors affecting the total solid waste daily generation of establishments in the city. Sex of the owner, his/her educational profile, his/her age, civil status, years in the business, type of establishment, and total number of employees were the selected variables considered in this study. It used correlation and Chi square analyses to determine whether or not the variables are related to or associated with the total daily waste generated by the establishments. The results show that the total number of employees and the type of establishment have a significant relationship/association with the generated waste. This study recommends that the local government of Butuan City should specifically develop a policy to address the amount of trash generated by medium-scale and high-scale establishments.
  Keywords: solid waste generation of non-household establishments; commercial solid waste; factors affecting solid waste generation; policy implications.
  
  
• WHAT STRATEGIC ACTIONS FOR AN URBAN CLEANLINESS POLICY ?CASE OF THE CITY OF CONSTANTINE (ALGERIA)  
  by Mehdi Kaghouche, Houria Ariane 
  Abstract: The improvement of citizens standard of living and change of their consumption habits generates a large production of waste in the city, causing several types of pollution, namely visual, olfactory, etc., which, in turn, significantly contribute to the degradation of the urban life, urban image and the environment. This article investigated the concept of urban cleanliness and its evaluation in Coudiat-Aty, one of the well-known, colonial neighbourhoods in the city centre of Constantine. The study used a survey and an observation grid to evaluate qualitatively and quantitatively the cleanliness of the neighbourhood through the calculation of several soiling indicators. The study findings showed that the Coudiat-Aty neighbourhood is considered unclean and has a mean indicator of soiling 3.02. This result can be explained by the highly busy neighbourhood. Thus by the presence of many administrations and schools which receive a lot of people.
  Keywords: city; environment; neighbourhood; pollution; soiling indicators; urban cleanliness; urban image; waste; Algeria.
  DOI: 10.1504/IJEWM.2023.10047081
   
  
• Study on Optimum Utilization of Water Treatment Plant Sludge for Treating Domestic Wastewater  
  by P. Rishi, D. JUSTUS REYMOND 
  Abstract: The water that is treated in the water treatment plant produces sludge that contains silt, debris, and coagulants that are used for the treatment process. The sludge so produced usually are dumped into waterbodies or landfills. When doing so the chemicals percolate into the soil reaching the groundwater and polluting them. This project mainly focuses on using this water treatment plant sludge in treating domestic wastewater. An aeration tank was set up with air pumps, bottles, measuring jars and glass tanks. The sludge was directly added to the sewage water collected from the wastewater treatment plant in varying proportions with a detention time of 5 days. When tested, it was found that the levels of BOD and COD were reduced drastically as compared to the existing methods of treatment. It was found that when 30% of sludge was added to the wastewater a 67% of reduction in BOD and 6.2% of reduction in COD was observed. A combination of 15% of activated sludge and 5% of water treatment plant sludge was observed with a decrease in 68% of COD and a 38% increase in BOD. Also, it was observed that the formation of froth in the aeration tank was reduced.
  Keywords: water treatment plant sludge; coagulant; domestic wastewater; aeration tank; activated sludge.
  DOI: 10.1504/IJEWM.2024.10054290
   
  
• To assess the dynamics of emission effluxes of carbon dioxide (CO2) and methane (CH4) by using the flux chamber technique at Titardi (capped) and Balicha (uncapped) landfill sites of Udaipur, Rajasthan  
  by Priyanka Dwivedi 
  Abstract: To evaluate the efflux of CO2 and CH4 gases by the application of static flux chamber (SFC) method at Balicha landfill site (BLS) and Titardi landfill site (TLS) situated in semiarid region of Rajasthan for a period of 2018 and 2019. The geometric mean flux of CO2 and CH4 fluxes at BLS during the studied period was ranged from 0.522 to 0.787 gm/m2 /day and from 0.175 to 0.252 gm/m2 /day, respectively. Whereas; the geometric mean fluxes of CO2 and CH4 at TLS was straddling from 0.272 to 0.472 gm/m2 /day and 0.087 to 0.134 gm/m2 /day sequentially in the same given period. The carbon footprint generated from the BLS and TLS was approximately 0.156 Gg/yr and 0.0135 of CO2 equivalent. The results, were statistically quantified using the coefficient of variation, demonstrated that the considerable temporal fluctuation in the CO2 and CH4 gas emanation fluxes at BLS and TLS was noticed so, mitigation needed.
  Keywords: static flux chamber; SFC; landfill efflux; greenhouse gas; GHGs; carbon footprints.
  DOI: 10.1504/IJEWM.2023.10055814
   
  
• Determinants of waste generation and segregation behaviour among the educated communities in the Western and the North-Western Provinces of Sri Lanka  
  by R.N.K. Soysa, Asankha Pallegedara, Ajantha Sisira Kumara, Dissanayake M. Jayasena, M.K.S.M. Samaranayake 
  Abstract: Solid waste, especially municipal solid waste, is a growing problem in Sri Lanka, and this problem has become intensified due to the absence of proper waste management systems in the country. At-source segregation could be practised at the household level as one of the solutions to this problem. The study intends to identify the factors influencing the waste generation and segregation behaviour of households of educated communities who have received tertiary education in Sri Lanka. Data was collected using a structured questionnaire through an online survey and responses from 402 respondents were analysed by employing logistic and OLS regression analysis. The study identified that family income level, local governmental authorities involvement in waste collection, age of the household head, and house type significantly affect the waste segregation behaviour of households of educated communities. Further, age of household head, family size, attitude, land area, household ownership, family income and involvement of local governmental authorities in the waste collection significantly affect the household solid waste generation. Implementation of policies and effective strategies in the local government authority levels would be an effective practise to encourage proper waste management practises in Sri Lanka.
  Keywords: waste management; waste segregation at source; waste generation; households; recycling; municipal solid waste; logistic regression; multiple regression; educated community; Sri Lankan; Sri Lanka.
  DOI: 10.1504/IJEWM.2023.10055247
   
  
• Dual step synthesis of chromium removal from tannery industry wastewater with photocatalytic effects of TiO2  
  by Marco Vinicio Masabanda, Vicente Delgado, E. Rajasekhar, Naga Raju Maddela 
  Abstract: In this paper, results presented were about photocatalytic effects of titanium dioxide (TiO2) in the removal of chromium (Cr) from tannery industry wastewater collected in tungurahua province in Ecuador. The primary source of the oxidation process (OP) is the method of photocatalysis. In this investigation, a prototype cylindrical collector (PCC) was designed to treat the wastewater. According to the results, a linear relationship was obtained between the dual step synthesis (DSS) of chromium removal from tannery industry wastewater with photocatalysis and solar energy. Photocatalysis effects showed highest removal of chromium at different concentrations and short periods of reaction time. The low-cost photocatalysts acted as functional capacity for the treatment of wastewater. The method of dual step synthesis of chromium removal from tannery wastewater with photocatalytic effects of TiO2 could be a sustainable and green synthesis approach. Dual step synthesis (DSS) method coupled with photocatalysis is effective in the production and generation of green energy. The degradation of organic pollutants in wastewater treatment is extensively engaged with titanium dioxide. The activation of the catalyst is necessary for solar radiation.
  Keywords: chromium; photocatalysis; solar radiation; titanium dioxide; wastewater.
  DOI: 10.1504/IJEWM.2023.10055732
   
  
• Investigation of the effect of water treatment plant effluent on river quality: a case study  
  by Shahram Moradi, Narges Raeisi, Darshan Mehta, Saeid Eslamian 
  Abstract: The influx of human sewage and effluent from most industries causes numerous pollutions in rivers, and the consequences of these pollutions may endanger human health and river ecosystems. In order to determine the effect of effluent on Karoun water quality, five sampling stations were considered. The first, third, and fifth stations were determined on the river, i.e., from Sheyban (upstream) to the Daghagheleh (downstream) treatment plant, on the other hand, the second and fourth stations were specified at the entrance of the treatment plant effluent to the river. Sampling was done monthly in four seasons from January 2020 to December 2020. Based on the values measured at the stations, the seasonal and annual quality index was calculated for each station, and then the different stations were classified based on the water quality index (WQI) system. According to the results, the annual quality index in different stations ranged from 524.79 to 648.93 (fourth group). On the other hand, comparing the results between the stations located on the river also shows that the water quality from the first to the fifth station is almost declining.
  Keywords: water treatment plants effluent; quality index; Karoun River; urban uses.
  DOI: 10.1504/IJEWM.2023.10056374
   
  
• Reverse logistics systems for post-consumer packaging in Brazil: obstacles and current panorama  
  by Ana Ghislane Henriques Pereira Van Elk, Leticia Figueiredo Da Silva, Marcelo Obraczka 
  Abstract: This article describes the current panorama of reverse logistics applied to post-consumption packaging at the federal level in Brazil, the current reverse logistics systems and the main obstacles and gaps that hinder their implementation are discussed. The study was limited to paper packaging (including boxboard and cardboard), glass, plastic, and metal. The span of the research was from 2010 (when the Brazilian Federal Law that established the National Solid Waste Policy was introduced) up to 2020. The results showed that paper is the material with the highest amount marketed by waste pickers organisations (52%), followed by plastic (22%), glass (17%), other metals (8%), and aluminum (1%). However, when considering the sales of materials, plastic has a greater representation than paper and other metals. Since the responsibility is shared, the RLSs works in a confusing manner, and there are conflicting interests, especially in the case of post-consumer packaging.
  Keywords: solid waste; waste management; post consumption packaging; reverse logistics; shared responsibility.
  DOI: 10.1504/IJEWM.2023.10056768
   
  
• Treatment of textile industry effluents by Fenton processes using galvanising industry residues  
  by Lucas Rollin Hilsendeger, Dayane Gonzaga Domingos, Beatriz Lima Santos Klienchen Dalari, Amanda Dalalibera, Maria Eliza Nagel-Hassemer 
  Abstract: Effluents from the textile industry pose a significant environmental threat due to their high concentration of toxic synthetic dyes and recalcitrant compounds. Advanced oxidation processes (AOPs) are a promising treatment option, but their high cost limits their practical application. This study used a liquid residue from the pickling stage of the galvanising industry as the acid and iron source to trigger Fentons reactions for textile wastewater treatment. A Box-Behnken design with two independent variables (2 to 4 mL L1 pickling liquid residue and 70 to 210 mg L-1 hydrogen peroxide) was used to conduct the experiments. The treatment resulted in 97% color and 96% turbidity removal, as well as 60% toxicity reduction verified by the germination rate of Lactuca sativa seeds. The treatment also reduced Cr by 54%, Zn by 7%, and eliminated Fe from the final effluent. This method offers a cost-effective and efficient approach for treating textile wastewater.
  Keywords: Fenton process; galvanising residue; textile wastewater; toxicity; advanced oxidation processes; AOPs.
  DOI: 10.1504/IJEWM.2023.10056942
   
  
• Comparison of the performance of intra and interspecific earthworm species in vermicomposting coral vine (Antigonon leptopus)  
  by S. G. Antony Godson, S. Gajalakshmi 
  Abstract: Three epigeic earthworm species Eudrilus eugeniae, Eisenia fetida, and Perionyx excavatus were utilised to understand the intra and interspecific competition for food and space by comparing the process efficiency of vermicomposting coral vine. Coral vine was subjected to vermicomposting directly without any supplementation of animal manure or any pre-processing. Over a period of 150-day pulse-fed operation, all the reactors fed with coral vine were sustainably vermicomposted with the increase in earthworm zoomass, and offspring generated. The most efficient production of vermicompost was achieved by E. eugeniae followed by other two species. There was no significant difference, statistically, in the reactor performance when two or three of the species were used together. Overall, it is affirmed that the interspecific population of earthworms has no perceptible advantage over intraspecific population in the vermicomposting of coral vine.
  Keywords: intra and interspecific population; coral vine; Eudrilus eugeniae; Eisenia fetida.
  DOI: 10.1504/IJEWM.2023.10056984
   
  
• Seasonal variation in composition and characteristics of solid waste and its potential environmental hazard: a study in Silchar, Assam, India  
  by Mausam Kumar Paul, Mithra Dey 
  Abstract: The waste management practices in India are in very poor condition. Several studies on the waste management scenario of the country depict the improper and unsatisfactory waste management practices in cities and towns. In view of this, the present study was undertaken to observe seasonal variation in physicochemical characteristics of solid waste along with the possible environmental hazard from the open dump yard. The paper presents that organic fraction is the major burden of the dump yard in all seasons. The PI was recorded in the range of 0.28-0.81. Igeo value of Pb (9.28 ± 1.59), Cu (10.36 ± 0.12), Mn (17.31 ± 0.33), and Ni (10.60 ± 0.42) was recorded a high potentiality of accumulation in the surrounding environment. However, the Igeo value of As (-2.66 ± 0.24) and Cd (-1.82 ± 0.63) was evaluated negatively.
  Keywords: open dumping; organic waste; pollution indices; contamination; waste management.
  DOI: 10.1504/IJEWM.2023.10057424
   
  
• Awareness, disposal behaviours, willingness, and inflow of electronic waste in Faisalabad, Pakistan  
  by Muhammad Arslan Aslam, Mokbul Morshed Ahmad, Sheharyaar Farid, Safeerul Islam Hashmi 
  Abstract: This study examines electronic waste awareness, disposal behaviours, and willingness to manage e-waste in Pakistan. Surveys, field visits, and questionnaires were used to collect data from consumers and businesses from February 2022 to April 2022. Findings show that 75.2% of participants were unaware of electronic waste, with 82% lacking knowledge of its hazardous effects. Around 45% sold their waste to informal recycling sectors. However, 91% expressed willingness to engage in e-waste management schemes. The research emphasizes the urgent need for an awareness campaign in Pakistan to educate the public about the risks associated with e-waste. Implementing legislation to prevent e-waste inflow is crucial. To tackle these challenges, the government should establish and enforce policies for proper disposal and recycling, support the growth of formal recycling industries, conduct public awareness campaigns for sustainable e-waste management.
  Keywords: waste electric and electronic equipment; WEEE; e-waste; awareness; behaviours; inflow; recycling; Pakistan.
  DOI: 10.1504/IJEWM.2023.10057512
   
  
• Benchmarking of integrated sustainable waste management in medium-sized Brazilian cities  
  by Valdir Eduardo Olivo, Eduardo Pavan Korf, Pedro Domingos Marques Prietto 
  Abstract: Integrated and sustainable solid waste management (ISWM) is a key factor in ensuring environmental protection and the quality of services provided by municipalities. This study aimed to establish a set of benchmark indicators for evaluating the ISWM in medium-sized Brazilian cities, through the analysis of five municipalities that stood out in management practices. The research method was based on the use of twenty-three indicators, which contemplate the sociocultural, environmental, and economic dimensions of waste management. The selected cities showed a higher level of engagement in both social and environmental areas. Some improvement opportunities have been identified since only two cities present economic sustainability and none has an information system for local waste management. Practices focusing on reducing waste and, also on governance were highlighted and used as a reference for replication in other municipalities and to establish the exchange of experiences among different cities.
  Keywords: sustainability; indicators; best practices; governance.
  DOI: 10.1504/IJEWM.2023.10058246
   
  
• Moderating role of environmental awareness on the relationship between greening practices and environmental performance of Nigerian public university  
  by Olaoluwa Paul Aasa, Olalekan Aquila Jesuleye, Adeyemi Oluwaseun Adepoju 
  Abstract: The functional areas of the university system - training, research, campus operations, and community service - make them centres of excellence for environmental management decisions. This study analysed the moderating role of environmental awareness on the relationship between greening practices and environmental performance in Nigerian public universities. The study used Participatory Action Research, with a sample of 386 respondents comprising staff, students, and commercial service providers selected through a purposive technique. Primary data were collected using a structured questionnaire, and the environmental awareness index, relative effectiveness index, relative performance index, and hierarchical multiple regression analysis were used to achieve the study’s objectives. The results indicated that greening practices contribute positively, and significantly to environmental performance, and awareness improves the influence of greening practices on environmental performance. The study suggests that universities should have an appropriate mechanism for improving knowledge and skills for environmental management.
  Keywords: environmental awareness; environmental performance; environmental management; greening practices; hierarchical multiple regression; HMR; public university.
  DOI: 10.1504/IJEWM.2023.10058320
   
  
• Facemask usage and disposal challenges: a survey on safe and user friendly mask for regular practices  
  by Vijayaraghavan Gopal, Sivamani Sivalingam, Keerthana Sureshkumar, Vinod Kumar Gangadharan 
  Abstract: The present study focus on extensive use of facemask (FM) and survey on eco-friendly material. The various types of masks including cloth mask, surgical masks, and respirators (class N, P, R) with their leakage, filtration, and penetration characteristics were analysed. This study helps the users to identify the specific applications of different types of mask and their safe disposal. Hence, a survey was conducted as masks preferred, how frequently they were changed, and the challenges faced while wearing the mask-like difficulty in breathing, fogging of lens, etc. The survey was conducted through a quantitative method with a set of questionnaires. It is observed that the majority (40.5%) of the population considers the N95 mask to be relatively safe and effective. The improper disposal of FM causes of diseases, forbids free aeration, clogs the waterways, severe sewage problems. Therefore, a proper disposal method needs to be followed to reduce environmental pollution.
  Keywords: N95 facemasks; COVID-19 pandemic; waste disposal; surveys.
  DOI: 10.1504/IJEWM.2023.10058992
   
  
• Hotspots of illegal dumping of solid waste along the Mthatha River  
  by Lazola Bangani, Hlekani M. Kabiti, Oseni Amoo, Motebang D.V. Nakin, Zendy Magayiyana, Simbarashe Ndhleve 
  Abstract: Solid waste illegal dumping is becoming a major problem as there are numerous illegal dumpsites observable along the Mthatha waterbodies. This paper aimed at mapping the hotspots of illegal dumpsites along the middle-course of Mthatha River, to suggest proper waste management strategies that can be applied. To achieve this, several field surveys along the river were conducted to identify and classify the illegal dumpsites. GPS coordinates were recorded to identify the locations of the dumpsites, which were later coded to QGIS for visual presentation. This study revealed seven hotspots of illegal dumping along the middle-course of the Mthatha River. Varied domestic waste compositions which included organic, and inorganic waste were identified as major pollutants from the informal and formal settlements. The study recommends the establishment of monitoring systems around hotspots, watercourse protection measures, frequent waste collection, environmental mass education, and law enforcement as an immediate remedy to curb the problem.
  Keywords: illegal dumping; Mthatha River; solid waste; management strategies; water pollution; waste dumping; waste mapping; waste management; waste hotspots.
  DOI: 10.1504/IJEWM.2023.10059110
   
  
• Implementation of smart dustbin - a CNN-based intelligent waste management  
  by M. Yuvashri, S.K. Varsha, M. Vijayalakshmi 
  Abstract: Waste generation across the globe is adversely increasing and the classification of waste has become tedious affecting the process of recycling and increasing the environmental risks so we devised a simple way to classify waste as biodegradable and non-biodegradable economically using an Arduino-embedded smart dustbin. Our automatic waste sensing smart dustbin is introduced as a revolutionary marvel of technology! Meticulously designed to revolutionise waste management, this innovative smart dustbin incorporates cutting-edge programming. With this advanced technology, our dustbin ensures that its lid is exclusively opened by biodegradable waste, delivering a seamless and eco-friendly dumping experience for our users. The classification is done using our CNN-based residual network model and the accuracy of our metrics turned out to be 95.6% for a random sample batch of 32 images.
  Keywords: waste management; smart dustbin; garbage classification; machine learning; object recognition; image processing; CNN model; computer vision; internet of things; IoT; ResNet model.
  DOI: 10.1504/IJEWM.2023.10059451
   
  
• Water loss in agriculture and loss of social welfare: evidence from pistachio production in Iran  
  by Alireza Alipour, Ali Yousefi 
  Abstract: This study aims to use a partial equilibrium model simulation for welfare analysis in the Iranian pistachio market. For this purpose, the pistachio supply and demand sides and their welfare surplus were evaluated. Based on the results, the unadjusted social welfare in the pistachio market is estimated at around 6,143,539 US dollars. Considering the economic value of water loss, it was found that $884,670, equivalent to about 14.4% of social welfare, is caused as an adverse side effect of pistachio production in Iran. The interpretation of the last figure is that every 10% reduction in water loss in pistachio production in Iran leads to an increase of about 3% in social welfare. Government investments to modernise the components of Iran’s agricultural irrigation system as a strategy with long-term effects and provide low-cost facilities to farmers for better water management are discussed as the most operational recommendations.
  Keywords: agricultural water loss; social welfare; partial equilibrium model; Iran.
  DOI: 10.1504/IJEWM.2023.10059938
   
  
• Indiscriminate disposal of waste challenges and implication for urban flooding and property values in emerging cities  
  by Peres Ofori 
  Abstract: The study examined the indiscriminate disposal of waste in Ghana relative to the flooding and devaluation of properties in urban Kumasi and Tamale. Adopting the waste management theory coupled with survey design, the study investigated the types of waste produced in these cities. Using SPSS, the regression was utilised to analyse the relationship between proximity to flooding and flood prone areas and residential rental values. In both Kumasi and Tamale no tenant was willing to pay higher rent for a house located at a flooding or flood prone area irrespective of the architectural designs. An R of 0.54 and a P value 0.0000 at 0.5 significant levels indicating a fairly strong relationship between the two variables tested. The study found it dangerous for an emerging city like Ghana to have higher percentage (82%) of households practicing open dumping as the favourite method of waste disposal and treatment.
  Keywords: approach; disaster; flooding; rent; reuse; waste management.
  DOI: 10.1504/IJEWM.2023.10059993
   
  
• Biostimulation of oily sludge - contaminated soil using organic and inorganic additives  
  by Amina Benchouk, Kahina Ighilahriz, Meryem Khellouf, Mohamed Khodja 
  Abstract: In this work, five microcosms containing polluted soil and the organics and inorganics stimulants were set up and undergone during five months. The sample was originated from an oil refinery located in the south of Algeria with 77. 15 ± 0.1 g/kg of TPHs. We have evaluated the performance of the biostimulation by: residual TPHs, composition of hydrocarbon residues by GC, microbial growth and eco-toxicity using Hordeum vulgare. Three bacterial were isolated from contaminated soil and characterised by MALDI-TOF. At the end of the experimental, we obtained a reduction of TPHs to 30.66 ± 1.15 g/kg. The results from GC showed the disappearance of major hydrocarbons pics within the treated microcosm. In the uncontaminated medium, the germination rate was higher than in the contaminated soil. A remarkable increase in the rate was observed in the seeds put in the treated medium to reach a percentage higher than 80%.
  Keywords: oily sludge; biostimulation; camel dung; solanum tuberosum peels; eggshells; bentonite.
  DOI: 10.1504/IJEWM.2023.10060205
   
  
• Sentiment analysis and word cloud analysis on e-waste news headlines using Python  
  by Shalini Wadhwa, Ananya Shukla 
  Abstract: E-waste or electronic waste is described as the waste electronic goods such as computers, smartphones, TVs, etc. Due to rapid technological advancement, e-waste or electronic waste has been increasing on a much faster rate. Electrical and electronic waste in India is increasing at an alarming rate of almost 3 million tons annually, out of which only 17.4% was recycled sustainably. India ranked third in producing e-waste globally after China and the USA. The ever-growing market of electronic equipment has also generated an ever-growing problem of e-waste. E-waste has become one of the issues for both the environment and human health. Therefore, it has become important to analyse the effect of e-waste on living beings especially in India. This report analyses the sentiment analysis and word cloud analysis on the e-waste news headlines generated by Indian news media.
  Keywords: e-waste; sentiment analysis; wordcloud; opinion analysis; electronic waste; environment; sustainability; business; consumer.
  DOI: 10.1504/IJEWM.2023.10060266
   
  
• Review study of e-waste management and resource recovery system for controlling environmental pollution  
  by Santosh Walke, Manoj Mandake, Makarand Naniwadekar 
  Abstract: This study investigates the escalating challenges of electronic waste (e-waste) disposal, highlighting its environmental and public health implications. It underscores the need for sustainable e-waste management by exploring diverse resource recovery methods and analysing environmental risk assessment and pollution control strategies. Methodologically, the research reviews a decade of literature, revealing e-waste generation trends, regulations, and laws. Emphasising issues with the informal recycling sector and limited environmental awareness among stakeholders, it offers a comprehensive overview of e-waste treatment technologies, advocating for resource-efficient practices. The article highlights challenges in organised e-waste management, considering unorganised recycling and environmental unawareness. An essential discovery underscores the immediate need for a strong recycling framework that adheres to ethics and laws. This framework would tackle the environmental and health risks associated with unregulated e-waste disposal. The study stresses the importance of accessible policies and collaborative efforts to combat e-waste proliferation, contributing to the discourse on sustainable resource management.
  Keywords: environmental pollution; e-waste management; recycling; waste treatment; resource recovery; risk assessment.
  DOI: 10.1504/IJEWM.2023.10060267
   
  
• Examining environmental health risks of indiscriminate solid waste disposal in Kosovo informal settlement, Cape Town  
  by Yamkela Jakeni, Thabang Maphanga, Benett Siyabonga Madonsela, Karabo Concelia Malakane 
  Abstract: The indiscriminate disposal of solid waste is detrimental to the environment and health. Given that, whilst the environmental health risks of indiscriminate solid waste disposal are well documented; the contributing factors are mostly overlooked especially within the informal settlement found in metropolitan cities. The study sought to examine factors associated with indiscriminate solid waste disposal that pose environmental health risks in Kosovo’s informal settlement, Cape Town. The current study used qualitative and quantitative research tools in the form of questionnaires and interviews. Collected data were analysed using the IBM SPSS Statistics 28.0 software. The study discovered that 93.85% of households have no access to disposal bins. The results show that 75.4% claim that the alternative municipal waste container is insufficient as it gets locked on weekends. This is an indication that there is not enough information provided by the municipality responsible for Kosovo’s informal settlement about solid waste management.
  Keywords: indiscriminate disposal; informal settlement; illegal dumping; waste management; waste collection.
  DOI: 10.1504/IJEWM.2023.10060300
   
  
• Utilising selvedge waste of polyester fabric: weaver’s approach for sustainable fabric development and analysis of basic properties  
  by Ambar Shah, Hafsa Jamshaid, Muhammad Shahbaz 
  Abstract: A lot of textile material is wasted at the weaving mill due to the cutting of the selvedge. The aim of present research is to use the leno selvedge without doing any extra process. The selvedge waste of polyester fabric was collected from the weaving mill. This waste was then dyed. Afterwards, samples of plain, 3/2 twill, and 5 end satin weaves were developed. It was revealed that the fabrics made from coarser yarn had greater areal density, greater thickness, greater strength, smaller water absorbency, smaller softness, smoothness, better drape, and greater resilience. Increasing interlacement, in weave, results in an increase in areal density, thickness, tensile strength, drape, and resilience. But it leads to lowering softness, smoothness, and absorbency. The fabric produced from the waste has applications in many kinds of home furnishing like rugs, matts, table runners, bottle covers, laptop covers, etc. The present work is an example of upcycling which leads to conserving the environment.
  Keywords: upcycling; selvedge waste; polyester fibre; home furnishings; recycling; polyester waste; leno selvedge.
  DOI: 10.1504/IJEWM.2023.10060481
   
  
• An assessment of literature on construction and demolition waste management barriers in Sub-Saharan Africa: lessons and implications for sustainability in South Africa  
  by Ngonidzashe Mangoro, Nzalalemba Serge Kubanza, Mulala Danny Simatele 
  Abstract: This paper discusses the challenges associated with the management of construction and demolition waste and its implications on environmental wellbeing and sustainability. Using existing and anecdotal literature, evidence suggests an increase in the demand for infrastructure for domestic and commercial purposes, and this in turn is exerting massive pressure on the construction industry to absorb and meet increased levels demand. This development has however, been accompanied by the generation of excessive quantities of waste, making it extremely difficult for urban managers in Sub-Saharan African cities to effectively and comprehensively manage construction and demolition waste. A major challenge being that this type of waste exists in forms that require extensive injection of resources for systematic separation far beyond the budgetary positions of many of these cities. In view of this, this paper is an attempt to systematically review and synthesise existing knowledge with a view of creating an inventory of the challenges associated to construction and demolition waste management and suggest possible solutions and approach for transforming this waste into a resource.
  Keywords: construction and demolition waste; urban managers; sustainability; barriers; environment; circularity; challenges.
  DOI: 10.1504/IJEWM.2023.10060718
   
  
• Investigation the monthly effect of the pumping schedule on the groundwater resources in Al-Najaf City, Iraq  
  by Hayder H. Kareem 
  Abstract: Groundwater serves as a crucial resource, especially in regions like the Middle East, where water scarcity prevails, particularly in arid areas. Uncertainty in groundwater systems arises due to aquifer parameters, climate change effects on recharge, and pumping rates. This study, utilising the MODFLOW computer model, examines the 2014 groundwater status near Al-Najaf City in Iraq, focusing on recharge, pumping rates, and Euphrates River levels monthly. The model integrates geological data, digital elevation models, and field measurements. Calibration reveals good agreement with field data, while sensitivity analysis highlights the significance of recharge and hydraulic conductivity. Validation displays a west-to-east flow pattern. Results indicate excessive pumping creates dry zones in the city, impacting both top and bottom layers. The Euphrates River consistently loses water due to pumping. This research offers valuable insights for sustainable management of the Euphrates River-groundwater system in Al-Najaf City, crucial for effective planning and resource management.
  Keywords: Al-Najaf City; conceptual modelling; Euphrates River-groundwater system connection; MODFLOW; Iraq.
  DOI: 10.1504/IJEWM.2023.10060855
   
  
• Identifying and analysing critical factors in construction resource waste management - Indian perspective  
  by H.A. Nishaant, J. Sudhakumar 
  Abstract: Construction resources and waste management are inevitable in any construction project worldwide to achieve a better outcome. Though considerable research exists to explain the importance of construction wastes and management techniques, this study comprises a detailed questionnaire survey to analyse and identify the critical factors of causes and sources of figure (CW), major wastes in construction, and the remedial measures to execute a wastes free construction project. Four hundred thirteen valid responses were collected from civil engineering experts from different parts of India. Findings were analysed based on importance indices ranking and factor extraction analysis. SPSS software was used for the data analysis. Experts’ recommendations were addressed, which can be used to control CW in projects. Its novel research and the research’s insights will help construction professionals understand the construction waste problems in India and direct their efforts toward proper construction waste management and resource utilisation.
  Keywords: construction resources; waste management; construction wastes; statistical package for social sciences; SPSS; resource utilisation; India.
  DOI: 10.1504/IJEWM.2023.10061418
   
  
• A critical review on manufacturing of bricks by replacing natural soil with landfill waste  
  by Chetan S. Dhanjode, Swati Ambadkar, Leeladhar Pammar 
  Abstract: Rapid urbanisation and industrialisation of Indian cities have envisaged the demand for enormous infrastructural growth. More and more population is flowing from rural part to urban area for their livelihood. This has led to the construction of dwellings on a large scale. Bricks, being one of the vital building components, need to be manufactured at a mass level that utilises in-situ clay, energy and water as the resources. The exploitation of such resources at such a pace not only creates an environmental imbalance but also raises a question on sustainability of the growth. This paper discusses the work that is being carried out by various researchers in utilising waste in the manufacturing of bricks and the review concludes with suggestions that how MSW can be used.
  Keywords: landfill; natural soil; municipal solid waste; MSW; decomposed soil; brick.
  DOI: 10.1504/IJEWM.2023.10061419
   
  
• A case study on challenges, opportunities and sustainable development of waste management in India  
  by S. Baranidharan, Julie Sunil 
  Abstract: Waste management solutions for a country as large and densely populated as India with several infrastructure bottlenecks required a thorough understanding of the local context, waste generation patterns, and available infrastructure. Waste Ventures India invested in research and development to develop innovative waste management solutions to address challenges faced in India. By collecting and analyzing data on waste generation patterns and available infrastructure, the company was able to design waste management systems that were tailored to Indian system. This case study highlights the importance of using evidence to inform policies and practices in waste management. Companies and governments can use data to design waste management systems that are effective, sustainable, and tailored to the needs of specific communities. This case guides analysis on how to ensure value for the stakeholders; how to identify benefits on a global and local front; and was the business scalable to ensure sustained impact.
  Keywords: waste management; social enterprise; environmental pollution; employment opportunities; sustainability and innovation; integrating policies.
  DOI: 10.1504/IJEWM.2023.10061433
   
  
• Impact of final consumption on CO2 emissions in Vietnam  
  by Huu Nguyen Xuan Nguyen, Nguyen Quynh Anh Tran 
  Abstract: As a country vulnerable to climate change impacts, the rapid increase in CO2 emissions in Vietnam recently poses a risk to achieve sustainable growth targets. In this study, the changes in Vietnam’s greenhouse gas emissions during two periods, 2007-2012 and 2012-2016, were examined through 60 selected paths in each period using the environmental input-output (EIO) model and the structural path decomposition (SPD) method. The results showed that final consumption activities played a more important role in CO2 emissions than emission intensity and input-output structure did. Moreover, the study also revealed that while the direct impact of final consumption demand on economic sectors led to a more significant increase in emissions, the indirect impact, in contrast, showed significant potential for reducing emissions as the supply chain expands amidst the country’s industrialisation and modernisation. Based on the study results, some key policy implications have been proposed.
  Keywords: structural path decomposition; SPD; CO2 emissions; Vietnam; environmental input-output model.
  DOI: 10.1504/IJEWM.2023.10061435
   
  
• Analysis of the performance of urban solid waste management system in Brazilian municipalities through data envelopment analysis  
  by Isabel Das Mercês Costa, Marta Ferreira Dias, Margarita Matias Robaina 
  Abstract: Despite the regulation of the waste sector in Brazil having taken place more than ten years ago through the National Waste Policy, data related to the performance of municipalities at the national level are unknown. In this sense, this study aims to analyse the efficiency of urban solid waste management in 940 Brazilian municipalities and as specific objectives: to measure the efficiency scores of USWM the municipalities; analyse the performance of USWM considering the population factor, the efficiency factor, the type of management, the region and the federative unit of the municipality and present/compare the profile of the efficient and inefficient municipalities considering the socioeconomic and environmental variables and aspects related to the achievement of efficiency. The technique used was data envelopment analysis, involving three inputs: number of employees, number of vehicles and expense and two outputs: volume collected and population served. The results revealed efficiency in only 4.36% of the municipalities and an average performance equivalent to 0.32. The highest percentages of efficiency were identified in municipalities whose waste is managed by the mixed economy society, in those located in the North and Northeast regions and in those with populations above 500,000 inhabitants.
  Keywords: urban solid waste management; efficiency; data envelopment analysis; DEA; Brazil; municipalities.
  DOI: 10.1504/IJEWM.2023.10061437
   
  
• Examining consumers’ response to plastic bag free shopping in an emerging market: a stimulus-organism-behaviour perspective  
  by Asphat Muposhi 
  Abstract: This study examines South African grocery shoppers’ response to the practice of plastic bag free shopping using the stimulus-organism-behaviour model. A structured questionnaire was used to collect cross sectional data from 529 grocery shoppers. Structural equation modelling was used to conduct path analysis. Media influence and green advertising were found to be less effective in providing the stimuli necessary to encourage shoppers to embrace the concept of plastic bag free shopping. The results also showed that the promising strategy to promote plastic bag free shopping is through social norms when they are internalised as personal norms or assimilated in the form of green self-identity. The findings of this study underscore the importance of developing credible and informative green advertising messages to de-activate entrenched habits of using single-use plastic shopping bags. This study accentuates the importance of promoting normative self-regulated behaviour as a sustainable strategy for managing plastic shopping bag litter.
  Keywords: plastic bag free shopping; stimulus-organism-response model; plastic bag free retail outlets; South Africa.
  DOI: 10.1504/IJEWM.2023.10061674
   
  
• Awareness and perceptions of sustainability and circular strategies among SME fashion producers in Ghana  
  by Akosua Mawuse Amankwah, Edward Appiah, Benjamin Kwablah Asinyo, Charles Frimpong 
  Abstract: The circular economy practice requires that businesses transform their current models. Awareness of the tenets of sustainability in the wake of the advocacy for circular strategies (CS) cannot be overemphasised. For Ghanaian fashion SMEs to imbibe sustainability in their practice requires knowledge of the concept. This research sought to inquire about the level of awareness and perceptions that could sustainably trigger the adoption and practice of CS. An in-depth qualitative case study was adopted to engage 9 owner-designers of SMEs in the two major cites of Ghana through interviews and observations. A purposive sampling strategy was adopted employing snowball technique. Data was cleaned, coded and analysed using thematic analysis in iterative manner. The major challenge was that, most of the ownerdesigners of fashion SMEs in Ghana have relatively low knowledge of sustainability and CS. The general lack of awareness makes it necessary to institute awareness-creation mechanisms to propagate the need for the industry to contribute towards achieving the United Nations Sustainable Development Goal 12: responsible consumption and production. The direct customer engagement of SMEs could potentially promote understanding of sustainability issues among practitioners and consumers, while adopting circular strategies that are mutually profitable.
  Keywords: sustainability; circular strategies; CS; awareness; perceptions; SME.
  DOI: 10.1504/IJEWM.2023.10061762
   
  
• Critical review of groundwater quality analysis techniques using multivariate statistical and soft computing approaches  
  by Ashay Devidas Shende, Mrunmayee Manjari Sahoo 
  Abstract: The continuous monitoring and assessment of water quality is an important aspect of the management of groundwater resources, substantially affected by the exponentially increasing demand for water to meet irrigation and industrial requirements. Various researchers have studied the variation in groundwater quality and applied different techniques to quantify, evaluate, predict and model the flux in groundwater quality parameters. The multivariate statistical analysis techniques including cluster analysis, factorial method and principal component analysis considerably used for the identification of spatio-temporal variation in groundwater characteristics. Several groundwater quality indices (GWQI) have been used to quantify the level of pollution and give an in-depth to improve the quality. In addition to the above approaches, various machine learning techniques have been developed increasingly due to their accuracy. The applications of traditional and present methods such as multivariate statistical models, groundwater quality indices and machine learning techniques through programming languages, probability and uncertainty analysis are analysed in this proposed study.
  Keywords: groundwater quality; multivariate statistical techniques; water quality index; ANN; ANFIS.
  DOI: 10.1504/IJEWM.2023.10061967
   
  
• Prospects of pernicious water hyacinth as eco-friendly and cost-effective usage in rural economy  
  by Md. Abdul Halim, Afsana Akter, Roksana Bannya 
  Abstract: This paper aims to introduce people to cost-effective and easy uses or to use the method of water hyacinth, which has been known as a notorious and detrimental weed species for a long time. People do not have the consent that this noxious weed can be used in many ways, and it can help socio-economic development in an area that is mainly affected by this species all year round or places near water bodies like beels, canals, rivers, etc. This study provides cost-effective and environment-friendly ways like using water hyacinth as biogas, biofertiliser, poultry, fish and animal feed, handicrafts, wastewater treatments, mulching material, floating seedbeds, etc. It will help people living nearby the water hyacinth-affected area to control this waste plant and create income-generating opportunities by providing economic solvency to rural poor people.
  Keywords: water hyacinth; potential applications of hyacinth; sustainable uses of water hyacinth; wastewater treatment; biogas; hyacinth management.
  DOI: 10.1504/IJEWM.2023.10061972
   
  
• Residents’ perceptions of the environmental risks of Al Qusais landfill, the United Arab Emirates  
  by Hana Alrahmani, Nicole R. Sierer, Abdullah A. Alkaabi, Mohammed A. Al Taher, Paria I. Karimi, Chike Chiedo, Sahar T. Issa, Aseel A. Takshe 
  Abstract: Living near landfills has been often associated with environmental risks. The aim of this study is to explore the residents’ perceptions of the environmental risks associated with the Al Qusais Landfill in Dubai, the United Arab Emirates (UAE). 24 residents living close (0 m to 1 Km), fairly close (1 to 2 Km), and far (more than 2 Km) from the landfill were interviewed and asked about their perceptions of the environmental risks associated with the landfill. The findings showed that the most common environmental risk perceived by the participants is the unpleasant odour. Other issues included dust, social quality, visual pollution, noise, and traffic. Future studies could take into consideration larger home-landfill distances and quantitatively assess the environmental and health risks of landfills.
  Keywords: landfill; environmental risks; public perception; waste disposal; waste management.
  DOI: 10.1504/IJEWM.2023.10062284
   
  
• Comparison of high-performance TiO2 coated al electrode (TiO2/Al) and conventional electrodes in removal of dyes using electrocoagulation reactor  
  by S. Vinodha, P. Jegathambal, R. Vidhya, A. Sivakami 
  Abstract: The process of electro-coagulation is quite complex in nature and an understanding about the process and the effect of primary operating parameters is a prerequisite for larger scale and field application. This work aims at studying the performance of electro coagulation reactor in a batch scale system for the treatment of textile dyeing waste water using iron and aluminium electrodes. The influence of the essential operating parameters like the initial dye concentration, applied current, pH, reaction time and the electrolyte concentration in removal of dye were premeditated. Also, the impact of these parameters on the economic parameters such as electrode and energy consumption which are directly proportional to the operation cost was also analysed. TiO2 /Al electrode showed maximum colour removal efficiency of nearly 100% with 60 mA of current whereas, Fe and Al electrodes showed maximum efficiency of 98% and 75% at 120 mA respectively.
  Keywords: electro coagulation; dye effluent; decolourisation; new TiO2 /Al electrode; sludge characterisation.
  DOI: 10.1504/IJEWM.2023.10062286
   
  
• Polyphenols and other phytochemicals from medicinal plants as eco-benign sources of therapeutics  
  by Adamu Mamman, Preeti Jain 
  Abstract: In view of reducing the burden of chemicals on the environment, various green chemistry approaches are being used nowadays for synthesising new molecules for applications in the biomedical field. Plant-derived phytochemicals are widely used as commodities in both traditional and modern industrial impact due to their vast range of pharmacological properties. Natural remedies for anticancer, anti-diabetic, anti-covid, antiradical, and other forms of diseases in clinical settings have attracted a lot of attention in the modern world medicinal plants and their biochemical constituents have become more significant in the fields of health and medicine due to their biocompatibility. It is ascertained that polyphenols and other phytochemicals derived from plants are excellent substitutes for conventional medications used in healthcare settings. By using the suggested natural sources of polyphenols and other chemical substances of botanical origin, a variety of physiological abnormalities can be controlled, treated, and cured, including cancer cell proliferation, cardiovascular diseases.
  Keywords: anticancer; cardiovascular; medicinal plants; polyphenols; phytochemicals; natural remedies.
  DOI: 10.1504/IJEWM.2023.10062287
   
  
• An innovative food waste management with enabled IoT and AI technique  
  by Aman Tripathi, Kumari Subrata Bhanu, Bekkam Krishna, V. Karthikeyan 
  Abstract: Food scarcity has become an international topic, and the wastage of food has a global impact on ethical and environmental costs. The bulk of the food is usually wasted in restaurants, hospitals, hostel mess, etc., where a massive amount of food is prepared. Such things are happening due to improper management. This paper proposes implementing an innovative food management system in the hostel mess to resolve food wastage. The proposed method works based on image processing, AI techniques with imposed IoT concepts. The work aims to minimise food wastage by monitoring the quantity of food dumped into the bin. Furthermore, based on food wastage, penalties apply to a particular identified individual. In addition, the proposed system assesses the quality and quantity of food based on wastage on a daily/weekly basis and is notified to the concerned authority. Moreover, it helps in monitoring the individual’s attendance effectively. Hence, this method will eventually reduce the food waste that is dumped into the dustbin. Finally, to test the feasibility of the proposed idea, the experimental setup was developed, and measured results were observed and verified under various case studies.
  Keywords: food waste; management; IoT; image processing; AI techniques.
  DOI: 10.1504/IJEWM.2023.10062289
   
  
• Why municipal solid waste management projects through private sector participation are uniquely challenging? - An exploratory study in India  
  by Tharun Dolla, Boeing Laishram 
  Abstract: Public-private partnerships (PPPs) have been affected by a myriad of challenges if not failures. This study examines the necessity of municipal solid waste (MSW) infrastructure and the ingress of PPP as a preferred mode of procurement in India. This is done by reviewing the anecdotal evidence from the projects to extract the state of practice and then identify the contestations, gaps, and lessons for future research relating to MSW PPP project delivery. Apart from the challenges reported in the past literature on MSW PPPs, this paper argues four new situations which are prevalent only in the MSW sector: private sector provision is not preceded by public sector provision, each segment of the supply chain will need a unique set of assets and services requiring exclusive focus; amongst such focus, technologies are diverse, and their maturities are diverse increasing the chances of failure because of bundling of various segments. The key to this sector’s success hangs on the extent to which the sectorial challenges are incorporated into the institutional mechanisms developed for the MSW sector without any a priori assumptions from other sectors which implemented PPPs. This paper suggests further research, specifically on the challenges posed by bundling various segments.
  Keywords: public-private partnerships; PPPs; municipal solid waste management; performance; private sector participation; PSP; India.
  DOI: 10.1504/IJEWM.2024.10066128
   
  
• Utilisation of South African spent foundry sand in paving blocks manufacturing  
  by Takalani Madzivhandila 
  Abstract: An increasing amount of waste is produced by industrial activities, human consumption behaviour, and linear process systems. Due to environmental legislation and the high cost of dumping, these materials are now used in other industries and products. The study is focused on utilising waste foundry sand in the manufacturing of bricks. It was found that foundry greensand waste is very suitable for the manufacturing of paving blocks. We attained the class 25 SANS 1058: 2006 standards which were based on a compressive strength rating of 25 MPa which is now recognised as Class 30/2.0. It can be concluded that waste foundry sand can be reused as a partial replacement for virgin sand. This will result in a reduced cost of production. Foundry greensand waste can also be used for the setting of pavers. Partial replacement of river sand with waste foundry sand will be an advantage to brick makers and it will reduce costs.
  Keywords: waste foundry; waste management; waste disposal; leachable concentration threshold limits.
  DOI: 10.1504/IJEWM.2023.10062490
   
  
• Research on measuring synergistic degrees of governance on urban environmental pollution based on the model of orderly degree in subsystem  
  by Tao Sun, Dengyue Xu 
  Abstract: Based on a situation analysis and a literature review, this paper selects 25 measurement indicators from five perspectives, and creates the indicator system and the model of orderly degree in subsystem for measuring synergistic degrees of governance on urban environmental pollution. This paper selects the city of Nanjing, Jiangsu Province, China, as the object of case research, and measures the synergistic degrees of governance on urban environmental pollution in the 11 districts of this city from 2013 to 2021. The measurement results show that the synergistic degrees in all districts had been on a steady rise to about 0.9 by the end of 2021. By contrast, the synergistic degrees in different districts had shown no significant difference in the same year during this period. Furthermore, it can also be concluded that a result of grading a synergistic degree depends not only on a grading standard but also on a valuing method.
  Keywords: the indicator system; expert surveys; synergistic degrees; synergistic governance; urban environmental pollution; the method of entropy weight; the model of orderly degree in subsystem; grade standards.
  DOI: 10.1504/IJEWM.2023.10063147
   
  
• Public perspectives and strategies in implementing waste separation in developing countries: a case study in Yogyakarta, Indonesia  
  by Laurentius Kevin Hendinata, Tantri Ardiwinata 
  Abstract: Effective waste management includes waste separation to minimise landfill usage and recover valuable resources. Nonetheless, the success of waste separation initiatives relies heavily on public engagement. This study investigates the challenges and prospects of implementing waste separation programs in a developing country, focusing on public perception. Specifically, the research examines Yogyakarta, Indonesia, and its residents’ perspective toward waste separation. A survey of 775 households conducted using stratified random sampling method was used in this study for three months to collect the data. The questions were multiple choices with Likert scale to quantify it. The data was analysed thoroughly with 95% confidence levels and Pearson correlation heatmap was used to round up the results. From this research, while residents recognise the benefits of waste separation, barriers such as deficient infrastructure and limited education persist. The study emphasises the importance of addressing these challenges to garner public support for sustainable waste management.
  Keywords: waste separation; public perception; waste management; developing country; Indonesia.
  DOI: 10.1504/IJEWM.2024.10063478
   
  
• Effect of combustion temperature on the performance of sewage sludge ash based cement mortar  
  by Piyush Tripathi, Debolina Basu, Priyaranjan Pal 
  Abstract: The paper explores the potential of reusing sewage sludge as a sustainable construction material, despite its higher organic content, as it presents a significant challenge in future management. In this study, the sewage sludge incinerated at different temperatures is partially substituted with cement to prepare the waste-replaced cementitious mortar cubes. The performance of the cubes prepared with suitable replacements of sewage sludge ash was analyzed on the basis of properties. The XRF results showed an increase in the silica content by 71.7% post incineration at high temperatures (up to 800ºC). The results indicated that the optimum sintering temperature for SSA cementitious application was 800ºC. The 10% replacement of cement with SSA obtained after calcinations of sewage at 800ºC produced the best cement mortar properties compared to the other replacements. The results concluded that SSA alone cannot be used as cementitious material. It may be used with some other admixtures.
  Keywords: chemical composition; compressive strength; high temperature; optimal condition; sewage sludge; waste recycling.
  DOI: 10.1504/IJEWM.2024.10063479
   
  
• Comparative analysis of machine learning algorithms efficacy in water resources management  
  by Danijela Voza, Goran Babic, Milovan Vukovic, Ivana Mladenović Ranisavljević 
  Abstract: One of the most reliable indicators of surface water quality is dissolved oxygen (DO). This study aims to propose a single model and the optimal number of variables for reliable DO prediction. In this regard, a comparative analysis of the efficiency of representative machine learning models in DO prediction was conducted. The initial parameters for examining the possibility of predicting the DO concentration were pH, temperature (T), electrical conductivity (EC), ammonium (NH4) and orthophosphates (PO4). Four input combinations of these water quality parameters were created based on the variable importance analysis, and machine learning techniques were applied to each subset. The obtained values indicated that all the predictive models perform best when four water quality variables - T, pH, PO4, and EC are used as input. Also, according to the results, the best-fitted model on the created dataset is support vector machine, and the deep learning model slightly lags behind it.
  Keywords: dissolved oxygen; prediction; machine learning algorithms; water quality.
  DOI: 10.1504/IJEWM.2024.10063773
   
  
• Utilising participatory approaches to enhance social acceptance in the design of urban recycling systems  
  by Ibrahim Mugerwa, Jianxin Chen, Shaohua Han 
  Abstract: This research investigates how participatory methodologies influence social acceptance in urban recycling system development, focusing on Kampala, Uganda. The central question is whether participatory approaches enhance social acceptance in this context, drawing from participatory design and innovation diffusion theories. A mixed-method system was employed, including literature reviews, case studies, and surveys, to assess the impact of participatory methods in recycling initiatives. It finds that participatory methodologies significantly influence waste management behaviours and introduces the ‘community recycling hubs’ concept as catalysts for community-driven recycling. The study recognises limitations regarding the long-term sustainability and scalability of community recycling hubs, the need for a deeper exploration of cultural factors in acceptance, potential survey bias, and the study’s specific focus on Kampala. Scientifically and managerially, this research advocates integrating participatory design into recycling systems to create socially embraced, environmentally responsible urban environments, offering valuable insights for advancing waste management and sustainability practices.
  Keywords: recycling systems; participatory approaches; social acceptance; sustainable urban development; waste management; community engagement; behavioural change; community recycling hubs; environmental sustainability.
  DOI: 10.1504/IJEWM.2024.10063774
   
  
• The potential uses of red mud in building industries: mechanical properties and durability of red mud-based cement mortars in different curing conditions  
  by Zahra Jamshidzadeh, Hamid Saghahazrati, Mohammad Amin Ghafouri 
  Abstract: Red mud (RM) is a hazardous waste and its disposal causes environmental challenges for soil, air, and groundwater. This research deals with the impacts of using RM on the compressive strength and durability of cement mortars subjected to a sulphuric acid solution. Nine mortar mixes having RM in the range of 0 to 20% by weight of cement were tested. Unheated RM and heated RM were tested for compressive strength, and water absorption at different curing ages. The weight loss was measured after 28 and 60 days of exposure in a sulphuric acid solution. Results indicated that samples with 5% RM had relatively high strength compared to control samples. The heated RM exhibited better results compared to unheated RM due to the loss of organic impurities, the release of absorbed water, and a part of chemically bound water from heated RM. Results revealed that RM reuse improves cement mortar durability.
  Keywords: red mud; RM; hazardous waste; cement mortar; compressive strength; water absorption; weight loss.
  DOI: 10.1504/IJEWM.2023.10064162
   
  
• Household disposal methods for various waste streams in the Bluff area, South Durban Basin, South Africa: what does adopting a comprehensive approach reveal?  
  by Amanda Gumede, Suveshnee Munien, Urmilla Bob 
  Abstract: Waste management has predominantly included unsustainable methods such as burying, dumping and burning. Therefore, waste generators need to shift waste management practices from generating and disposing to more sustainable practices. The study assesses the disposal methods for various waste streams adopted within households. Specifically, the research aimed to undertake a comprehensive examination of household disposal methods for different waste streams in the Bluff area, South Durban Basin, South Africa. The study was guided by a multi-conceptual theoretical framework and adopted a mixed methodological approach. In total, 400 household quantitative surveys and six key informant interviews were administered. Households predominantly disposed of almost all waste streams generated in dustbins, a significant proportion also repurposed reusable materials, recycled and separated different waste streams. Age, sex, employment status, household decision-making and monthly income were significantly associated with the main household waste disposal methods for various types of waste generated.
  Keywords: waste streams; waste management; waste generation; households; sustainable consideration; comprehensive approach; Bluff; South Durban Basin; SDB; South Africa.
  DOI: 10.1504/IJEWM.2024.10064697
   
  
• Governance practices of the grassroots initiatives involved in solid waste management: does collaboration with local government matter?  
  by Goodluck Charles, Mesia Ilomo 
  Abstract: Despite the increasing support for more participation of grassroots initiatives in the formal solid waste management (SWM) system, little is known about their governance approach, especially in developing countries. Accordingly, this study investigated the governance practices of grassroots organisations involved in collecting solid waste and the extent to which their collaboration with municipal councils influenced their governance approach. The study entailed in-depth interviews with 10 municipal and ward officers, and 21 leaders of grassroots organisations in Dar es Salaam, Tanzania. The findings reveal that, in order to apply for and execute municipal waste collection contracts, grassroots organisations were compelled to formalise, institute governance structures to ensure accountability, transparency and financial control and the participation of the community in managing waste. This was facilitated by grassroots organisations adopting a controlled system of collecting fees, opening a bank account and reconciling municipal reports with their records, being supported to access resources and ensuring the engagement of the community. In view of this, the study demonstrates how cross-sector collaboration of the public sector and non-state actors ensures that waste is collected and managed effectively.
  Keywords: grassroots initiatives; solid waste management; SWM; local government; cross-sector collaboration; municipal councils; collaborative governance.
  DOI: 10.1504/IJEWM.2024.10064698
   
  
• Hospital waste management after the outbreak of coronavirus in Shariati Hospital of Mashhad City  
  by Moslem Razavinejad, Fahimeh Moghaddam, Hosein Alidadi, Behnam Barikbin, Aliakbar Dehghan 
  Abstract: Ensuring proper medical waste management in hospitals and health centres during health emergencies such as the crisis of COVID-19 disease is one of the most critical obstacles in preventing diseases. We aimed to explore hospital waste management at Shariati Hospital of Mashhad during the outbreak of COVID-19 disease in a period of 4 months from March to June 2021. The average weight of infectious waste increased by 134% and general waste decreased by 87% compared to before the outbreak. Also, 90% of the total waste produced during the hospitalisation of COVID-19 patients is infectious waste, while plastics have the highest percentage. In the decontamination of infectious wastes, the results of 95.9% of the tests were in good condition. Also, according to the hospital waste management checklist, the score obtained in all stages of waste management in the hospital was 82%.
  Keywords: Mashhad Shariati Hospital; hospital waste management; COVID-19 disease; outbreak; infectious waste; checklist.
  DOI: 10.1504/IJEWM.2024.10064699
   
  
• A review on experimental study of oxyhydrogen HHO blends with gasoline, diesel and biofuels in IC engine  
  by Shrikant Bhardwaj, Arvind Jayant 
  Abstract: This review paper presents a comprehensive study on performance and emission characteristics of I.C Engines fuelled with blends of gasoline, diesel, bio-diesel and HHO/H2 gas. In S.I Engine reduction in SFC, CO and HC obtained around 15%20%, 19.19% and 19.12% whereas enhancement in BTE, ITE around 9% and 9.84% while decrement in NOx nearly 6.80% with lean mixture blends of Gasoline with HHO/H2 in S.I engine. In CI engine reduction in SFC, CO and HC were around 8.55%, 16.64% and 24.39% whereas enhancement in BTE nearly 4.29% while increment in NOx around 5.08% when blends of diesel and bio-diesel with HHO/H2 incorporated. Blended fuels with HHO/H2 supply ≤ 0.3 lpm at a reduction in NOx obtained but with HHO/H2 supply 0.3-3 lpm increase in NOx formation observed. SFC for different blending mixtures of fuels with HHO/H2 gas decreases except contradictory results at 3 lpm in four-cylinder engine.
  Keywords: IC engine; oxyhydrogen gas; emission; performance parameters; efficiency; HHO; fuel; review.
  DOI: 10.1504/IJEWM.2024.10065030
   
  
• Selection of interpolation technique for spatial distribution of prominent pollutant in a traffic induced polluted area  
  by Sindhu Parameswaran Nair, Praveen Arakkal, Letha Janaki, Meera Mohan, Amrutha Meera Asokan 
  Abstract: Urbanisation has led to an increase in air pollution by the addition of various pollutants from industrial emissions, automobile exhaust, etc. Air quality index gives an indication of quality of the ambient air. By identifying the prominent pollutant, the control strategies to reduce its emission can be taken. The prominent pollutant was identified by comparing the subindex of pollutants in the area. A spatial distribution map of the prominent air pollutant concentration was prepared in GIS using five interpolation techniques - Universal Kriging, Ordinary Kriging, inverse distance weighting, spline regularised and spline tension. The selection of best technique is crucial as it determines the accuracy to which the spatial distribution of the pollutant is modelled. In this study, the prominent pollutant of the study area was found to be PM10. Ordinary Kriging and inverse distance weighing were identified as the best methods for mapping of PM10 concentration in Thiruvananthapuram corporation.
  Keywords: air quality index; AQI; pollutant concentration; prominent air pollutant; interpolation techniques; exceedance factor.
  DOI: 10.1504/IJEWM.2024.10065460
   
  
• Plastic polymer waste conversion into green by-end products: a review  
  by Abdul Majeed Pirzada, Sallahuddin Panhwar, Hareef Ahmed Keerio, Siraj Ahmed, Asim Ali, Zartasha Pitafi 
  Abstract: Plastic waste disposal is a global problem and can be a legacy for development. It is obvious that polymers made from plastic make people’s lives easier, but they also pose a threat to the environment. Nano-plastics are widely used because of their small size, allowing them to reach the liver, brain, placenta, heart and kidneys. Researchers are now focusing on converting plastics into value-added products by using various methods such as liquefaction, pyrolysis and gasification. Plastic conversion offers a wide range of applications for carbon-based materials such as graphene, carbon quantum dots, carbon nanotubes, and carbon nanomaterials used in biosensors for environmental applications, composites, medical devices, energy storage devices, conductive coatings and paints, conductive fillers or to improve the strength of composites, and transistors for semiconductors, lithium-ion batteries, and microelectronics. In addition, plastic waste is used in the construction industry and road building materials. This review highlights the importance of plastic conversion and the challenges of implementing plastic waste conversion technology at the commercial level.
  Keywords: plastic waste conversion; value-added products; carbon material; zero waste.
  DOI: 10.1504/IJEWM.2023.10065708
   
  
• How do drought periods boost rural unemployment? Empirical evidence of Iran  
  by Alireza Alipour 
  Abstract: Drought periods are one of the major challenges in many countries that have affected various economic and social factors. The impact of drought on rural unemployment is one of the most important research issues that have not been well studied. In this study, using time series data and econometric methods, the effect of drought on rural unemployment in Iran was investigated. The results showed that drought periods have affected agricultural and non-agricultural GDP. Between these two variables, non-agricultural GDP growth significantly reduces rural unemployment. Therefore, in addition to the effects of drought on other components affecting rural unemployment, such as the quality of rural living and rural working environments, drought also increases rural unemployment by reducing the growth potential of the Iranian agricultural sector. Rural credits and the ratio of rural incomes to rural expenditures were also identified as other important factors affecting rural unemployment. Finally, targeting rural credits to increase non-agricultural occupations consistent with rural characteristics was presented as the most important policy recommendation of the study.
  Keywords: drought periods; rural unemployment; econometric analysis; Iran.
  DOI: 10.1504/IJEWM.2024.10066635
   
  
• Estimation of greenhouse gas emissions from municipal solid waste landfill, Durgapur, India  
  by Md Mainul Sk 
  Abstract: Unscientific landfilling of solid waste significantly contributes to global warming due to high concentration of greenhouse gases (GHGs) emitted from landfills. This study estimates landfill gas (LFG) emissions from the Shankarpur landfill site in Durgapur, India. The methodological principles adopted in this analysis are based on primary and secondary data sources. LandGEM model was applied to predict LFG emissions from Shankarpur landfill site, in an effort to determine the energy recovery potential and reduce GHGs emissions into the atmosphere. The total LFGs, methane, carbon dioxide, and NMOC emissions from the landfill have been found to be 1.98 x 10^07, 6.62 x 10^03, 9.92 x 10^06 and 1.19 x 10^04 m3 /year, respectively. The results indicate that the highest concentration of GHGs emissions occurs shortly after landfill closure and the emission decreases gradually over time. The study highlights the potential adverse impact of greenhouse gases emissions from the landfill site on the ambient air quality, underlining the need for improved waste management practices in study area to achieve sustainable waste management and to combat global climate change.
  Keywords: landfills; greenhouse gases; GHG emissions; global warming; sustainable waste management; methane emissions; carbon dioxide emissions; energy recovery; landfill gas; Shankarpur landfill; India.
  DOI: 10.1504/IJEWM.2024.10067389
   
  
• Tackling food waste in a university food service operation: a case study  
  by Boineelo Pearl Lefadola, Annemarie Viljoen, Gerrie Du Rand 
  Abstract: The challenge of food waste in the university food service setting, especially from a systems perspective is understudied. This is a major gap as the effective management of food waste requires a holistic approach as the parts of the system are interdependent. This exploratory study applies a systems theory to investigate food waste prevention. Organisational documents were analysed, in-depth interviews, focus group discussions and participant observations were conducted. The study reveals that even though food waste remains a challenge in the case university, prevention efforts were implemented. These include automated stock forecasting, use of specifications, appropriate receiving and storage practices, stock monitoring, use of standardised recipes, production of good quality meals in correct quantities, temperature and time controls, meal auditing and correct portioning. The study’s findings can be applied in the development of food waste management policies and procedures in the universities and the wider catering sector.
  Keywords: food waste; sustainability; university food service operation; food waste prevention; environment.
  DOI: 10.1504/IJEWM.2024.10067390
   
  
• Optimal design and performance evaluation of effluent treatment plant for textile industry using ceramic membrane with ensemble learning method  
  by Satyajit M. Deshmukh, Sonali R. Dhokpande, Amaya A. Sankhe, Ajinkya R. Khandekar 
  Abstract: The textile industry significantly impacts the environment due to the discharge of pollutants. This study aims to enhance the efficiency of effluent treatment plants (ETPs) in this sector by implementing advanced monitoring and control systems. Key parameters such as flow rate, pH, temperature, dissolved oxygen, concentrations are continuously monitored using sensors. The study evaluates the use of artificial neural networks (ANN) to predict biochemical oxygen demand (BOD) and optimise the Step-Feed process for nitrogen removal. An ensemble learning was developed to prediction accuracy. MATLAB was used data analysis. Results indicate high efficiency in removing total suspended solids (TSS) and BOD, enhancing wastewater treatment effectiveness, reducing costs and environmental impact. The natural filter media itself has a higher proposed removal rate of 99%, and the comparison of increased TSS removal efficiency (97%) and BOD removal efficiency (98%) were combined. It enables effective wastewater treatment while lowering operational costs and environmental impact.
  Keywords: textile industry; performance evaluation; ceramic membrane; ensemble learning method; data acquisition systems; common effluent treatment plants; CETP.
  DOI: 10.1504/IJEWM.2024.10067391
   
  
• Exploring young consumers’ sustainable plastic management behaviour in a developing country  
  by Md. Hasibul Islam, Md. Tamzidul Islam, Md. Asif Kamal, Mahmudul Hasan, Partha Prasad Chowdhury 
  Abstract: This paper explores the impact of cognitive, non-cognitive, and emotional factors in shaping consumers’ sustainable plastic management behaviour (SPMB), which includes plastic consumption reduction and plastic waste disposal behaviour. An extended model of the Theory of Planned Behaviour is developed, incorporating factors- moral norm, pro-environmental habit, and anticipation of guilt feeling. Data was collected surveying young consumers from Dhaka city in Bangladesh. The result shows that intention is the main precursor of SPMB followed by the perceived behavioural control (PBC) and habit. Intention is significantly impacted by eco-awareness, moral norms, guilt feeling and habit, whereas insignificantly impacted by attitude, subjective norm and PBC. Among these factors, the impact of the moral norm was found to be strong in forming the intention of SPMB, where moral norm significantly impacts guilt feeling. It was found that non-cognitive and emotional factors are dominant compared to cognitive factors in shaping SPMB of young consumers.
  Keywords: plastic pollution; plastic waste management; recycling; theory of planned behaviour; TPB; norm activation model; NAM; theory of interpersonal behaviour; TIB; Generation Z; sustainable consumer behaviour; PLS-SEM.
  DOI: 10.1504/IJEWM.2024.10067392
   
  
• Artificial Intelligence-based techniques to monitor and maintain the drinking water quality supplied to households  
  by Yernagula Rajesh, Manasa Dwarampudi, Yernagula Pratap 
  Abstract: The assessment of drinking water quality is a crucial issue due to the severe pollution of available water, which can cause diseases. Traditional methods of water quality measurement are labour-intensive and costly. This article proposes a real-time monitoring system using artificial intelligence (AI) approaches to address the issues related to drinking water quality. The system uses a multi-sensor array (MSA) and a raspberry Pi-based hardware platform to monitor water quality. The factors estimated are pH, total dissolved solids (TDS), and turbidity, which are the physical and chemical boundaries that most impact water quality. A fuzzy logic-based framework is developed to classify water quality into three classes: good, bad, and ordinary. The proposed method is compared to existing methods like MLP and SVM, and it produces better performance with accuracy, precision, recall, and F-score values of 98.724, 97.899, 95.154, and 98.875, respectively.
  Keywords: drinking water; water quality; WQ; real-time monitoring; raspberry Pi-based platform; fuzzy interface system; python; multi-sensor array; MSA.
  DOI: 10.1504/IJEWM.2024.10067755
   
  
• Impact of biodiesel blends on combustion and endurance individualities of diesel engine  
  by G. Balasubramanian, P. Balashanmugam, K. Kumaravel, S. Sivaprakasam 
  Abstract: The biggest issue with operating vehicles in big cities is idling, and biodiesel is a viable alternative fuel. This study examined the effects of biodiesel blends on CO, NOx, and lubricating oil emissions to demonstrate their viability. The results show that biodiesel produced fewer CO and NOx emissions than diesel fuel. Increasing engine speed and load can further decrease emissions. The study also found that boosting engine braking power at lower loads lowered CO emissions. However, NOx releases were still high due to biodiesel’s oxygen content. Adjusting engine load and mix ratio of biodiesel can reduce NOx production. The study also explored the combustion properties of biodiesel-butanol combinations at various injection pressures and their impact on NOx emissions. The findings suggest that biodiesel can be a viable alternative fuel for urban vehicles, with potential benefits for reducing emissions and improving engine performance.
  Keywords: biodiesel production; blend fuels; plastic pyrolytic oil; palm oil biodiesel; diesel; endurance characteristics; diesel engine.
  DOI: 10.1504/IJEWM.2024.10067756
   
  
• An IoT-integrated adaptive waste management system for optimal route planning and enhanced sustainability  
  by K.N. Pallavi, K.N. Rashmishree 
  Abstract: The rapid growth of urban populations has led to a significant increase in waste generation, making effective waste management a critical concern. As cities strive to enhance liveability and quality of life, efficient urban planning becomes essential. We propose a smart city-based IoT-integrated system for adaptive waste management. This system aims to improve fuel efficiency, reduce the time waste trucks take to reach designated intelligent bins, and optimise routes for energy efficiency. Experimental results demonstrate that MOAHA significantly outperforms established optimisation algorithms, such as the multi-objective salp swarm algorithm (MSSA), multi-objective simulated annealing (MOSA), and multi-objective whale optimisation algorithm (MOWOA), achieving up to 30% improvement in routing efficiency and energy savings.
  Keywords: internet of things; IoT; waste bin; adaptive waste management; optimisation; smart city.
  DOI: 10.1504/IJEWM.2024.10067912
   
  
• A landfill tax refund scheme: analysis and simulation for local governments in the UK  
  by Yoko Nagase, Wolfram Berger 
  Abstract: Taxes on waste such as a conventional landfill tax belong to a policymaker’s standard arsenal to reduce pollution, encourage recycling and reuse of materials, and promote the circular economy. Yet introducing or tightening such taxes typically causes political resistance from the regulated parties. We propose a tax refund scheme that can mitigate this problem. Under the scheme waste management authorities would be required to pay a tax on landfill waste before the resulting tax revenue is rebated to them. Waste-reducing efforts would be stimulated because the refund structure rewards authorities that outperform others in reducing landfilled waste. Using the 20192020 data on municipal solid waste we present a simulation of our policy proposal for the UK that can serve as a policy design blueprint for other countries. The information requirements for the policy scheme are low, and its design and administration are simple.
  Keywords: waste management; municipal solid waste; MSW; landfill waste; landfill tax; LT; refundable disposal tax; local government finance; UK; circular economy; economic analysis and simulation; revenue-neutral policy scheme.
  DOI: 10.1504/IJEWM.2024.10068220
   
  
• A review on the diaper waste issue: generation, composition, disposal and valorising potential  
  by Arshana Remla, M. Latha, M. John Robert Prince 
  Abstract: The exponential growth in the usage of diapers worldwide has led to a significant increase in diaper waste generation, posing serious environmental and health challenges. The improper disposal of diapers has raised concerns about potential pollution, chemical leaching, and landfill overcrowding. This paper aims to explore the complexities of diaper waste and present sustainable solutions to mitigate its adverse impacts. The review examines disposable diaper’s generation, composition, materials, and chemicals, highlighting environmental and health risks, and analyses current waste management practices like landfilling, incineration, pyrolysis, and composting thereby emphasising the need for eco-friendly strategies. The paper also explores innovative valorisation approaches like advanced recycling technologies, biodegradable materials, and waste-to-energy conversion methods, highlighting their feasibility and potential for minimising environmental impact. By implementing responsible practices and supporting research in this field, society can move towards a cleaner and more sustainable approach to diaper waste management.
  Keywords: sustainable diaper disposal; hygiene waste management; generation; composition; disposal; valorising potential; public health; landfill; recycling; composting; incineration; life cycle analysis; waste-to-energy; circular economy approaches.
  DOI: 10.1504/IJEWM.2024.10068221
   
  
• A review on sustainable and effective utilisation of municipal solid waste incinerated ash  
  by Neelam Singh, Vikas Kumar 
  Abstract: Municipal solid waste incineration (MSWI) ash has received more attention in recent decades due to its potential use in engineering applications across the world. The current study examined the potential application of MSW ash in the fields of construction industry, geotechnical applications, and geoenvironmental. The particle size behaviour of MSWI bottom ash is similar to that of silty sand (SM), and the specific gravity of MSW ash is lower than that of normal sand, which makes it a lighter material. Results from many researchers indicate that the use of MSWI ash for soil stabilisation enhances its engineering properties like shear strength and unconfined compressive strength (UCS). It is found from the results that MSW ash can be used as partial replacement of aggregate up to 50% for making the concrete. Also, the results indicate that the geopolymer can be effectively used as a binding agent in stabilising the MSW ash.
  Keywords: waste management; MSWI ash; construction sector; unconfined compressive strength; UCS; geopolymer.
  DOI: 10.1504/IJEWM.2024.10068407
   
  
• Individualised community refuse audits for food waste reduction and management: a systematic review  
  by Lai Ti Gew, Li Lin Lein, Mohamad Kheireddin Aroua 
  Abstract: Refuse audits or also known as waste audits are essential to achieve waste reduction goals and policy implementation. However, the main component for intervention regarding waste issue is the availability of reliable data in waste production and composition. While the amount of waste has increased tremendously, huge gaps involving household waste data and methodologies have yet to be solved. In this review, we summarise 31 published literatures that examined the rate of generation of household waste from across the world. By understanding the amount and composition of waste generated by individualised community, valuable information can be recorded to develop tailor-made waste management solutions at the community level. Results showed that the challenges are small sample sizes, imbalance demographic, sampling biases, time and energy consuming for participants. Future studies may consider a consistent quantification technique, thus, the waste information collected can be compared between dissimilar sources.
  Keywords: waste audit; waste management; household waste; residential waste; disposal of refuse.
  DOI: 10.1504/IJEWM.2024.10068485
   
  
• Landfill site selection using geographical information system and remote sense techniques. A case of Fiche Town, North Shewa, Oromiya, Ethiopia  
  by Bezu Abera Geresu 
  Abstract: This study investigates unsafe municipal solid waste disposal in Ethiopia, using GPS data, secondary data from governmental offices, and satellite images. During determining a suitable site, ten factors such as land use, land cover, built-up area, geology, religious institutions, soil, slope, road network, groundwater table, and surface water were selected initially. These parameters were analysed using pairwise comparison and a weighted analytical hierarchy process. As the results indicated, the suitable area is about 566 ha (19.66%), the moderately suitable is 432.8 ha (22%), the low suitable is about 1,830.58 ha (63.54%) and the unsuitable area is about 51.56 ha (1.79%) of the study area. The selected suitable sites were in the direction of the south, southeast, northern, and west parts of Fiche Town. These areas are far from the main road, built-up areas, religious institutions, surface water, and groundwater Moreover, the site had: basalt geology, vertosol type of soil, low-depth groundwater (>50 m), and low slope (<10%).
  Keywords: geographical information system; municipal solid waste; MSW; site selection; the analytic hierarchy process.
  DOI: 10.1504/IJEWM.2024.10068676
   
  
• Preparation and characterisation of activated carbon impregnated with goethite and magnetite for dye removal by the combined action of adsorption and oxidation  
  by Maria Eduarda Bragião, Gilberto Da Cunha Gonçalves, Tamires Roberta Damascena Dos Santos, Márcia Teresinha Veit 
  Abstract: In this work, methodologies for the precipitation of goethite (G) and magnetite (M) iron oxides on activated carbon (AC0) were applied to prepare two composites (G/AC and M/AC) to remove the Reactive Black 5 (RB5) dye by adsorption/oxidation processes. SEM and EDS showed that the iron oxides partially covered the surface of the AC0, giving a small decrease in the specific surface areas and total pore volume of composites. The FTIR and XRD results showed the presence of goethite on the surface of the G/AC composite (4.23 mgFeg-1 ), and a mixture of goethite and magnetite oxides in M/AC (30.77 mgFeg-1 ). The RB5 dye adsorption and oxidation experiments were carried out in initial pH of 3.0 and 6.0. The composites were effective in removing the RB5 dye in the presence of H2O2, since they were able to combine the adsorptive characteristics of AC with the oxidative capacity of iron oxides.
  Keywords: oxidation; adsorption; heterogeneous Fenton; iron oxide; composite.
  DOI: 10.1504/IJEWM.2024.10068941
   
  
• Sugarcane bagasse ash as a supplementary cementitious material in concrete to enhance the compressive strength and reduce the permeability and corrosion  
  by Alka Aniruddha Avasthi, Kanchan C. Khare, Sayali D. Apte 
  Abstract: In the present study, binary mixes of different proportions ranging from 5% to 30% replacement of cement by sugarcane bagasse ash (SCBA) which is an agricultural byproduct is investigated for compressive strength, economy, weight and permeability of the mix. It is observed that 15% replacement of SCBA is optimum considering the compressive strength, permeability, weight and economics of the mix. It further reduces the use of cement, which is one of the major sources of pollution in the environment (Andrew, 2018). The test results indicate that using sugarcane bagasse ash, the permeability of the mix has reduced to 'very low' as compared to the normal concrete mix M15, reducing the moisture ingress in concrete and corrosion. It further helps in reduction of CO₂ emission, and the cause of corrosion also solving the problem of disposal of the agricultural waste generated which has no standard method of disposal (Maraveas, 2020).
  Keywords: sugarcane bagasse ash; SCBA; partial replacement; supplementary; cementitious; scanning electron microscopy; SEM; energy dispersive X-ray analysis; EDS; permeability.
  DOI: 10.1504/IJEWM.2023.10062288
   
  
• Assessing quality wastewater for irrigation in Swaziland (eSwatini) using multivariate statistical analyses: organics and nutrients  
  by Thabani Ivor Mamba, Julius Musyoka Ndambuki, Williams Kehinde Kupolati, Adesola Olutayo Olaleye 
  Abstract: Data is sparse on the quality of wastewater (WW) discharged into rivers. The objective was to assess the quality of WW variables (organics and nutrients) using multivariate statistical analyses and compare these with international WW quality standards for irrigation. Samples were collected for 22 months and were analysed in the laboratory. Data were analysed statistically. Results showed WW variables (nutrients) were within the normal standards and guidelines for water quality for irrigated agriculture and aquatic lives. The principal component analysis (PCA) showed four components accounted for about 79.40% of the variations in the properties of the WW effluents. The PC-1 was 31% and associated with coliforms and chemical oxygen demand (COD). The results of the cluster analysis showed that the 11 WWTPs could be grouped into four clusters for ease of management. The elevated levels of total coliforms (TC), FC and COD from these treatment plants may pose risks to aquatic lives.
  Keywords: Eswatini; irrigation; multivariate statistics; organics; wastewater treatment; Southern Africa; Swaziland.
  DOI: 10.1504/IJEWM.2023.10052823
   
  
• Innovative urban landscape design of riverfront area in Kembang Jepun, Surabaya  
  by Bambang Soemardiono, Murni Rachmawati, Defry A. Ardianta, Wawan A. Suryawan 
  Abstract: Surabaya is a big city along Kalimas River. The river was the beginning of the development of the city of Surabaya and a means of transportation between up and downstream areas. The area around the river is mostly used as a public space, but the rest are not yet used optimally. One of them is the riverside of Kembang Jepun area which has several potentials related to its function of urban landscape elements, accessibility and open space. Urban landscape described as socio-ecological systems where natural and social processes connected with the ecosystems (Andersson, 2006). The purpose of this research is to develop urban landscape design innovation in riverside area. The analysis is giving priority to environmental, economic and social aspects in determining the innovative design for riverfront area. The analysis tool that will be used is focus group discussion (FGD) and workshop to capture the aspirations of the community.
  Keywords: aspirations; Kembang Jepun area; river; urban landscape.
  DOI: 10.1504/IJEWM.2025.10068955
   
  
• Public awareness, knowledge, and practice toward mandatory waste separation to support recycling in Greater Kuala Lumpur, Malaysia  
  by Hui Ling Chen, Tapan Kumar Nath, Alex M. Lechner 
  Abstract: This study aims to examine different stakeholders' awareness, knowledge and practice toward household waste separation and recycling (HWSR) in Greater Kuala Lumpur to address the paucity of research on the effectiveness of the policy and public's attitude concerning HWSR in Malaysia. Data were collected through: 1) a public social survey carried out using face-to-face interviews and online surveys and 2) key-informant interviews with stakeholders associated with solid waste management (SWM. Pearson's correlation, Mann-Whitney U and Chi-squared tests were carried out to find significant differences between selected variables. Results show that the respondents had good knowledge (mean score of 3.2 out of 4), and 38% of the respondents were practising some form of HWSR. Many respondents (65%) were not aware of the current waste separation policies, but 93% of the respondents would be willing to separate waste at source if necessary facilities were provided. Suggestions are made for stricter enforcement of policies and dissemination of information around HWSR, through public engagement by all relevant stakeholders.
  Keywords: household waste; waste separation at source; recycling; social survey; public awareness; human behaviour; policy effectiveness; Greater Kuala Lumpur; Malaysia.
  DOI: 10.1504/IJEWM.2024.10053038
   
  
• Healthcare solid waste management in South Ethiopia: a case study of Wolaita Sodo referral hospital  
  by Gatew Mitiku Shetie, Lambiso Wecho Bereket 
  Abstract: Healthcare facilities generate wastes that contain potentially hazardous wastes to the public and the surrounding environment. The management of these wastes is an important issue in Ethiopia. Wolaita Sodo referral hospital is one of the hospitals in the country, which has critical problems in healthcare waste management. Across sectional descriptive study was conducted between March and November 2019 to quantify, characterise, and assess healthcare solid waste management practices in Wolaita Sodo referral hospital, South Ethiopia. Observational checklists, questionnaires, and weighting scales were used to quantify the generated healthcare solid wastes. The mean generation rate of healthcare solid waste was 0.67 kg/patient/day and 0.74 kg/bed/day. Of this, 0.41 kg/bed/day (56.7%) was general waste and the rest 0.34 (43.5%) was hazardous waste. The quantity of total healthcare solid waste generated was positively correlated with the number of beds and patients (r_s = 0.57, P = 0.02 and r_s = 0.73, P = 0.01). Waste segregation and pre-treatment of infectious wastes were not practiced by the hospital. Solid wastes were stored, transported, treated, and disposed of improperly. Hence, waste management practices need to be improved through periodic training and adequate supplies of materials for the waste handler.
  Keywords: hazardous waste; healthcare solid waste; waste characterisation; waste management; waste quantification; Wolaita-Sodo; Ethiopia.
  DOI: 10.1504/IJEWM.2025.10055253
   
  
• Are the local communities safe? Assessing the slag management practices in the ferro-chromium smelting industry and the risk of chromium (VI) in the reuse applications in Zimbabwe  
  by Winmore Kusena, Mitchell Faith Muwairi, Melanie D. Nicolau 
  Abstract: Ferro-chromium smelting has contributed to the accumulation of vast amounts of slag in developing countries. The current study examines the slag management measures at Zimbabwe Alloys Chrome (ZAC) and determined possible chromium (VI) leaching into different environments. The research incorporated both the qualitative and quantitative data collection methods. The leading solid waste management practice was disposal to landfill, which is the least preferred option on the solid waste management hierarchy. All the sampled water sources around ZAC showed traces of chromium (VI) above acceptable standards. Chromium six levels also exceeded the environmental management act (EMA) regulations of 0.05 mg/l, the EPA standards of 0.01 mg/l, and OSHA limits of 0.01 mg/l under neutral, alkaline, and acidic laboratory environments. The findings imply a lack of sustainable waste management practices at ZAC that expose communities to chromium (VI). The study highlighted an urgent need for ZAC landfill remediation to protect the water bodies and communities exposed to the slag reuse applications.
  Keywords: ferro-chromium; chromium (VI); waste management practices; Zimbabwe alloys chrome; slag; leachability; smelting industries.
  DOI: 10.1504/IJEWM.2024.10063951
   
  
• Characterisation study of different electric arc furnace steel slags for usage in wastewater treatment  
  by Tedlaye Forsido, Rob I. McCrindle, Jannie Maree, Lizzy Mpenyana-Monyatsi 
  Abstract: In this study mineralogical, morphological, phase structure and chemical composition of electric arc furnace slags is presented. The result indicated that both types of slag contain the same types of minerals and metals in different percentage. The most common mineral forms were akermanite, ghelenite, merwinite, monticellite, calcite, ferrite and quartz. It was found that EAFD contains a larger proportion of the readily soluble mineral forms, less concentration of hazardous metals and a larger percentage of alkali (greater than 94% as CaCO₃). Hence, EAFD is a better choice for acidic wastewater treatment for neutralisation as well as removal of metals. It also contains less concentration of hazardous metals. It contains more than 94% lime measured as CaCO₃, which is used for neutralisation and removal of hazardous metals from effluents by raising its pH to a level where they form stable precipitates at a raised pH.
  Keywords: electric arc furnace slag; EAFS; akermanite; ghelenite; merwinite; monticellite; wastewater; treatment.
  DOI: 10.1504/IJEWM.2025.10068679