Reuse potential of mature leachate after application or isolated and combined advanced oxidative processes
by Samara Teixeira Pereira; Elisângela Maria Rodrigues Rocha; Romildo Henriques Do Anjos Junior
International Journal of Environment and Waste Management (IJEWM), Vol. 27, No. 4, 2021

Abstract: The aim of the study was to analyse the reuse potential of leachate from a mature landfill treated by advanced oxidative processes. We tested three treatment routes: H₂O₂/UV-C followed by solar photo-Fenton; H₂O₂/UV-C followed by Fenton and solar photo-Fenton isolated. The leachate treated by the three analysed routes can be reused as non-potable water for urban, environmental and aquaculture purposes. The treatments improved the quality of the treated leachate with removals of colour, chemical oxygen demand (COD) and thermotolerant coliform 90%, 70% and 100%, respectively. The isolated solar photo-Fenton route resulted in better quality treated leachate in terms of COD, turbidity, sludge volume, nitrate concentration and residual H₂O₂. Therefore, it was concluded that leachate reuse can improve urban solid waste management and that isolated solar photo-Fenton provided better results using a natural radiation source to increase the efficiency of the photocatalytic process, allowing the operational costs of to be reduced.

Online publication date: Tue, 01-Jun-2021

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