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Experimental Study on Fenton Oxidation/Coagulation Process in Subsequent Treatment of Landfill Leachate

Jin Yong-xiang

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Abstract

After treated by UASB+A/O system,the landfill leachate in Liulitun Landfill Site has COD of 1 350 to 1 500 mg/L and ammonia nitrogen of 280 to 420 mg/L,and needs to be further treated.Therefore,using Fenton oxidation/coagulation as subsequent treatment process,the pollutant removal effects under different conditions were investigated.The results show that under the conditions of Fe2+=0.016 7 mol/L,H_2O_2=0.05 mol/L,FeCl_3=600 mg/L,AP410C=4 mg/L and pH=7,this method is particularly effective,and the removal rates of turbidity,COD and ammonia nitrogen are 82%,80.7% and 55.9% respectively.

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What this paper is about

After treated by UASB+A/O system,the landfill leachate in Liulitun Landfill Site has COD of 1 350 to 1 500 mg/L and ammonia nitrogen of 280 to 420 mg/L,and needs to be further treated.Therefore,using Fenton oxidation/coagulation as subsequent treatment process,the pollutant removal effects under different conditions were investigated.The results show that under the conditions of Fe2+=0.016 7 mol/L,H_2O_2=0.05 mol/L,FeCl_3=600 mg/L,AP410C=4 mg/L and pH=7,this method is particularly effective,and the removal rates of turbidity,COD and ammonia nitrogen are 82%,80.7% and 55.9% respectively.

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Available abstract

After treated by UASB+A/O system,the landfill leachate in Liulitun Landfill Site has COD of 1 350 to 1 500 mg/L and ammonia nitrogen of 280 to 420 mg/L,and needs to be further treated.Therefore,using Fenton oxidation/coagulation as subsequent treatment process,the pollutant removal effects under different conditions were investigated.The results show that under the conditions of Fe2+=0.016 7 mol/L,H_2O_2=0.05 mol/L,FeCl_3=600 mg/L,AP410C=4 mg/L and pH=7,this method is particularly effective,and the removal rates of turbidity,COD and ammonia nitrogen are 82%,80.7% and 55.9% respectively.

Key concepts: Leachate, Turbidity, Chemistry, Pollutant, Ammonia, Coagulation, Environmental chemistry, Nitrogen

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