The Comparative Study on Coagulation-Fenton Method in Landfill Leachate Pretreatment

Using coagulation,Fenton oxidation and Fe/C micro-electrolysis for landfill leachate preatreatment study,the single factor analysis results showed that coagulation for treatment of landfill leachate,the removal of chroma effect was not obvious,but the COD removal rate was up to 47.1%,the optimum reaction parameters were 10%PFS,dosage was 1.2 g/L,stirring speed was 350 r/min,the pH value was 7,and the precipitation time was 120 min.Fenton oxidation treatment of landfill leachate COD and chroma removal rates was up to 45.6% and 93.8%,the optimum reaction parameters were that the pH value was 3,the dosage of H2O2 was 6 mL/L,n(H2O2)/n(Fe2+)=8:1,and reaction time was 90 min.Comprehensive comparison in preprocessing using coagulation method both in process and economic aspects were more feasible.