Article: Kinetic-based extrapolating of methane production potential for seaweed/food waste matrixes Journal: International Journal of Global Warming (IJGW) 2020 Vol.21 No.1 pp.86 - 104 Abstract: Seaweed accumulation result in undesirable environmental problems along the coastline of Istanbul. In this study, methane production potential of seaweed/food waste matrix was evaluated to explore how much of waste seaweed could be fed with food waste to an anaerobic digester at what rates of substrate to inoculum (S/X). Results indicated that the reactors fed with only food waste were inhibited with the S/X ratio exceeding 4 g VSsubstrate/g VSinoculum, but it could be reached up to 2,172 m3biogas/m3reactor/d in continuous-fed-system when seaweed/food waste mixture ratio increases to 2/1 at 6 g VSsubstrate/g VSinoculum. This was indicated that seaweed was a useable agent with a good buffer capacity to improve performance of digesters arising from substrate inhibition. Methane production potential data was also modelled to describe the digestion kinetics by modified Gompertz, first-order, logistic function, and transference equation models. Transference function among applied models gave the best fit to describe the kinetics of methane production potential at practical applications. Inderscience Publishers - linking academia, business and industry through research

Title: Kinetic-based extrapolating of methane production potential for seaweed/food waste matrixes

Authors: Hulya Civelek Yoruklu; Ahmet Demir; Bestami Ozkaya

Addresses: Department of Environmental Engineering, Faculty of Civil Engineering, Yildiz Technical University, Davutpasa Campus 34220, Esenler, Istanbul, Turkey ' Department of Environmental Engineering, Faculty of Civil Engineering, Yildiz Technical University, Davutpasa Campus 34220, Esenler, Istanbul, Turkey ' Department of Environmental Engineering, Faculty of Civil Engineering, Yildiz Technical University, Davutpasa Campus 34220, Esenler, Istanbul, Turkey

Abstract: Seaweed accumulation result in undesirable environmental problems along the coastline of Istanbul. In this study, methane production potential of seaweed/food waste matrix was evaluated to explore how much of waste seaweed could be fed with food waste to an anaerobic digester at what rates of substrate to inoculum (S/X). Results indicated that the reactors fed with only food waste were inhibited with the S/X ratio exceeding 4 g VS_substrate/g VS_inoculum, but it could be reached up to 2,172 m³_biogas/m³_reactor/d in continuous-fed-system when seaweed/food waste mixture ratio increases to 2/1 at 6 g VS_substrate/g VS_inoculum. This was indicated that seaweed was a useable agent with a good buffer capacity to improve performance of digesters arising from substrate inhibition. Methane production potential data was also modelled to describe the digestion kinetics by modified Gompertz, first-order, logistic function, and transference equation models. Transference function among applied models gave the best fit to describe the kinetics of methane production potential at practical applications.

Keywords: seaweed; the Marmara Sea; food waste; kinetics; anaerobic digestion.

DOI: 10.1504/IJGW.2020.107874

International Journal of Global Warming, 2020 Vol.21 No.1, pp.86 - 104

Received: 12 Jun 2019
Accepted: 20 Dec 2019
Published online: 26 Jun 2020 *

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Title: Kinetic-based extrapolating of methane production potential for seaweed/food waste matrixes

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