Study of landfill leachate pretreatment by coagulation-Fenton process

Coagulation-Fenton process has been used to the study of landfill leachate pretreatment,the optimal conditions of coagulation: 10% PFS dosage 1.25 g / L,stirring speed 300 r / min,initial pH = 7,reaction time 2 h and the optimal reaction parameters of Fenton oxidation: pH = 3.5,H 2 O 2 dosage 6 mL / L,n(H 2 O 2):n(Fe2 +) = 5∶ 1,reaction time 1.5 h.The results showed that the COD removing rate was 70.4% and the chroma removing rate reached 97.3% under the above optimal conditions,which would be well prepared with further study.