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Optimization of Photo-Fenton Treatment of Mature Landfill Leachate
Photo-Fenton treatment of a mature landfill leachate was optimized by using the response surface methodology (RSM). The optimum operating variables to achieve 70% removal of COD, 80% removal of colour and 80% removal of NH3-N were: H2O2/COD molar ratio 3.75, H2O2/Fe2+ molar ratio 10.5 and irradiation time 1.5 h. There was good agreement (< 2% error) between experimental removal efficiency and model prediction. The characteristics of the photo-Fenton treated leachate were: NH3-N 112 mg/L, colour 108 Pt-Co Unit, COD 350 mg/L, BOD5 116 mg/L and BOD5/COD ratio 0.33, indicating that the treated leachate was amenable to biological treatment. The study has revealed that RSM is an effective tool to optimize the treatment process and photo-Fenton is an effective pretreatment of mature landfill leachate for biological treatment.
Keywords
Photo-Fenton, Mature Landfill Leachate, Response Surface Methodology (RSM).
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