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2017•Jiangsu Environmental Science and TechnologyRequires access

Pretreatment of Aged Landfill Leachate by PFS Coagulation Sedimentation-Internal Electrolysis-Fenton Oxidation Process

Shuo Wang, Lian Liu, Xiong Ji, HE Hai-liang

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Abstract

The optimum operating conditions of PFS coagulation sedimentation+ iron-carbon internal electrolysis + fenton oxidation pretreatment of aged landfill leachate were studied. The results showed that when PFS coagulation sedimentation at pH 4.0, dosage 400 mg/L, the COD removal rate of the landfill leachate was above 50%. When the Fe/C volume ratio was 1:1, the COD removal rate was above 50%, and the chroma removal was above 70%. The removal rate of COD was about 40%when the dosage of H2O2 was 1.0 mL/L.The removal rate of COD was about 40%, when the pH value of leachate after iron electrolysis was adjusted to 4.0, with H2O2 added to form fenton reagent. The whole process is stable in operation and low in cost, which is an effective treatment for aged landfill leachate pretreatment.

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The optimum operating conditions of PFS coagulation sedimentation+ iron-carbon internal electrolysis + fenton oxidation pretreatment of aged landfill leachate were studied. The results showed that when PFS coagulation sedimentation at pH 4.0, dosage 400 mg/L, the COD removal rate of the landfill leachate was above 50%. When the Fe/C volume ratio was 1:1, the COD removal rate was above 50%, and the chroma removal was above 70%. The removal rate of COD was about 40%when the dosage of H2O2 was 1.0 mL/L.The removal rate of COD was about 40%, when the pH value of leachate after iron electrolysis was adjusted to 4.0, with H2O2 added to form fenton reagent. The whole process is stable in operation and low in cost, which is an effective treatment for aged landfill leachate pretreatment.

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Available abstract

The optimum operating conditions of PFS coagulation sedimentation+ iron-carbon internal electrolysis + fenton oxidation pretreatment of aged landfill leachate were studied. The results showed that when PFS coagulation sedimentation at pH 4.0, dosage 400 mg/L, the COD removal rate of the landfill leachate was above 50%. When the Fe/C volume ratio was 1:1, the COD removal rate was above 50%, and the chroma removal was above 70%. The removal rate of COD was about 40%when the dosage of H2O2 was 1.0 mL/L.The removal rate of COD was about 40%, when the pH value of leachate after iron electrolysis was adjusted to 4.0, with H2O2 added to form fenton reagent. The whole process is stable in operation and low in cost, which is an effective treatment for aged landfill leachate pretreatment.

Key concepts: Leachate, Sedimentation, Chemistry, Reagent, Electrolysis, Fenton's reagent, Volume (thermodynamics), Waste management

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