Advanced Treatment of Landfill Leachate by Coagulation-Fenton Process

Coagulation-Fenton process was used in the advanced treatment of landfill leachate after treated by SBR. It was found that the optimum dosage of PFS was 0.6 ml/L ,and the optimum conditions of Fenton reaction were that pH was 5.04, the mole ratio of H2O2 and Fe2+ was 1.2∶1, the dosage of FeSO4·7H2O was 1.2 g/L, H2O2 and Fe2+ were divided for three parts to add, and the whole reaction time was 3 hours. Under this condition, COD was reduced below 100 mg/L which was less than that of the first grade of the national emission standard, and the chemical reagent cost was 2.93 yuan/m3.