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.
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