Title: Reuse potential of mature leachate after application or isolated and combined advanced oxidative processes

Authors: Samara Teixeira Pereira; Elisângela Maria Rodrigues Rocha; Romildo Henriques Do Anjos Junior

Addresses: Department of Civil and Environmental Engineering, Technology Center, Federal University of Paraíba, University City, Campus I – João Pessoa, PB, Brazil ' Department of Civil and Environmental Engineering, Technology Center, Federal University of Paraíba, University City, Campus I – João Pessoa, PB, Brazil ' Environmental Sanitation Laboratory, Technology Center, Federal University of Paraíba, University City, Campus I – João Pessoa, PB, Brazil

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.

Keywords: recalcitrant effluents; photo-Fenton; peroxide; ultraviolet radiation; solar energy; reuse; treatment; water; Fenton; colour; coliforms; biodegradability.

DOI: 10.1504/IJEWM.2021.115382

International Journal of Environment and Waste Management, 2021 Vol.27 No.4, pp.475 - 486

Received: 27 Aug 2019
Accepted: 08 Jan 2020
Published online: 01 Jun 2021 *

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