Study On Treatment Of Landfill Leachate By Electrochemical Oxidation Process

In view of the immature approach and the poor effect of the landfill leachate in our country presently, this paper continuing the previous experimental study of our task group,studing the Eletrochemical Oxidation Process to treating landfill leachate. And on this basis,the recirculation process combined with the Electrochemical Oxidation process to deal with landfill leachate.The best processing conditions to deal with landfill leachate are: SnO2/Ti Electrode board, 7.5A/dm² of Electricity density,pH=4 and NaCl 1g/50mL.And on this basis,analyse Whether the best conditions suited to deal with landfill leachate of different chroma and vary quality, analyze of NaCl dosage, handling capacity etc which impact the electrochemical oxidation process of different leachate quality. Finally, the recirculation process combined with the Electrochemical Oxidation process to study the disposal effect of the leachate.Through above experimental study,drew following main conclusion:1,In the electrochemical oxidation process, NaCl dosage should be regulated according to the initial concentration of leachate.In this experimentation, NaCl dosage are 3g/150mL(COD > 35000 mg/L> NH₃—N > 400 mg/L),0.6g/150mL (COD10000 mg/L,NH₃—N 100mg/L-250 mg/L) and 0.3g/150mL (COD5000mg/L,NH₃—N50mg/L-100 mg/L)2,When the leachate of different chroma and vary quality is electrolysd under similar processing conditions,the treatment effect of NH₃—N is increased along with the debase of initial NH₃—N chroma.If the chroma range of NH₃—N is 50mg/L-1100mg/L, the treatment effect range of NH₃—N is 45%- 100%.The treatment rate of COD is unconspicuous and treatment rate is not high. If the chroma range of COD is 5000mg/L-61000mg/L, the treatment effect range of COD is 31.66%-60.07%.3,In this paper,the ratio of electrode board of electrolyte is defined electrode interface ratio and the unit is m²/L. The electrode interface ratio is also one of the factors which affect the electrochemical oxidation. Based on the two experiments which the electrode interface ratio were 0.00016m²/L and 0.00011m²/L,the experiment shows that electrode interface ratio affect the treatment effect of COD and NH₃—N,ICE, energy consumption.When the two experiments are compared from treatment effect, ICE, energy consumption, handling capacity and COD treatment capacity,we commend the experiment that the electrode interface ratio is 0.00011m²/L.The infection factors of that experiment are 150mL of treatment volume, 7.5 A/dm² of Electricity density, 3g /150mL of NaCl dosage,4 of pH.4,If Recirculation process combined with Electrochemical Oxidation process,the disposal effect is better than the the Electrochemical Oxidation process only.When the leachate which the initial concentration of COD and NH₃—N is 38904mg/L- 54192 mg/L and 810.86mg/L-1162.77mg/L respectively is treated by Recirculation + Electrochemical Oxidation process,the concentration of COD and NH₃—N are 15230 mg/L-21067mg/L and 207.61mg/L-458.93mg/L respectively,the the treatment rate of COD and NH₃—N are 46.28%-58.05% and 59.47%-67.02% respectively,the average energy consumption is 3.27 kwh/kgCOD.5,Based on the outcome of best electroanalysis parameter stated experiment and Recirculation + Electrochemical Oxidation process,we commend Recirculation + Electrochemical Oxidation process.Thereinto,the infection factors of Electrochemical Oxidation process are:...