Advanced Treatment of Landfill Leachate by Fenton Oxidation-Coagulation Process

After the UASB treatment in the trial experiment,the landfill leachate in Liulitun Landfill Yard, with COD and ammonia-nitrogen concentration being 2 350-2 600 mg/L and about 1 300 mg/L respectively, was inefficient in being biochemicalized and low in C/N,which required physico-chemical treatment before advanced biochemical treatment.This experiment introduced Fenton reagent oxidation first and then chemical coagulation,so as to compare removal effects under different dosages.Resultsshowed that the combination of oxidation of Fenton reagent and chemical deposition was effective in the removal of turbidity,COD and ammonia-nitrogen in landfill leachate.Under the condition of c_Fe²⁺=0.03 mol/L,c_H2O2=0.09 mol/L,ρ_PAC= 800 mg/L,ρ_KP1207B=10 mg/L,this method was particularly effective,with the removal rates being 62 %, 54 % and 35 % respectively.