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Study on Treatment of Landfill Leachate by Electrochemical Oxidation Process

Author: LiGuoYan
Tutor: LiuShan
School: Chang'an University
Course: Environmental Engineering
Keywords: Landfill leachate Electrochemical Oxidation Recharge electrochemical oxidation COD Ammonia
CLC: X703
Type: Master's thesis
Year: 2009
Downloads: 195
Quote: 2
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Abstract


For landfill leachate treatment methods immaturity, poor processing problems, the continuation of the research group in the previous stage experimental research papers, and continue to study the electrochemical oxidation treatment of municipal landfill leachate. And on this basis, the recharge process and electrochemical oxidation process combination treatment of landfill leachate. The best electrochemical oxidation treatment of landfill leachate treatment conditions: the chlorine evolution electrode current density from as 7.5A/dm to 2 pH = 4 the the NaCl dosage for 1g/50mL. On this basis, the analysis of the optimum processing conditions are suitable for different concentrations of landfill leachate water quality analysis of the the NaCl dosage electrolytic contact surface than factors such as different water quality of leachate electrolysis process. Finally, the recharge method and electrochemical oxidation method to study the effect of its treatment of leachate. Through the above experiment, draw the following major conclusions: 1, the electrochemical oxidation treatment with different concentrations of leachate NaCl investment plus the amount required to be adjusted according to the stock solution concentration (COD, ammonia). The experiments NaCl dosage 3g/150mL (stock solution of COD gt; 35,000 mg / L, ammonia gt; 400 mg / L), 0.6g/150mL the (dope COD10000 mg / L, of ammonia 100mg/L-250 mg / L) 0.3g/150mL the (dope COD5000 mg / L, of ammonia 50mg/L-100 mg / L). 2 different concentrations, different water leachate using the same electrolytic conditions electrolysis the ammonia treatment rate increased with decreasing initial ammonia concentration. The dope ammonia concentration range 50mg/L-1100mg/L, ammonia processing rate from 45% -100%; the the COD treatment law is not obvious, the processing rate is not high and the fluctuation range the dope COD concentration range 5000mg/L-61000mg/L, of COD processing rate of 31.66% -60.07%. 3 papers of the electrode plate area / volume definition of each electrolyte for electrolytic contact surface than units of m to 2 / L. The electrolytic contact surface ratio is also affecting the electrochemical oxidation one of the factors. By comparing the electrolytic contact surface than 0.00016m ~ 2 / L and 0.00011m ~ 2 / L of the two sets of experiments, the following conclusions: the electrode plates sufficiently mixed with leachate premise, the the electrolytic contact surface impact of leachate processing rate of COD and ammonia electrolysis energy consumption, current efficiency. Two sets of experiments from the treatment effect, the current efficiency, power consumption, and the amount of leachate treatment, COD removal amount of five aspects of comparison, is recommended to use the the electrolytic contact surface ratio 0.00011m ~ 2 / L experiment. I.e. the processing volume of 150mL, current density of 7.5 A / DM ~ 2, the the NaCl dosage 3g, pH = 4.4, the recharge electrochemical oxidation process to remove leachate, the treatment effect was significantly better than the individual electrochemical oxidation process . The dope COD 38904mg/L-54192 mg / L, ammonia leachate 810.86mg/L-1162.77mg/L after recharge Electrochemical Oxidation Process, the COD concentration 15230 mg/L-21067mg/L in COD treatment rate of 46.28% -58.05%; ammonia concentration 207.61mg/L-458.93mg/L, the ammonia treatment rate of 59.47% -67.02%, average electricity consumption is about 3.27 kwh / kgCOD. Determine the the experimental, and recharge electrochemical oxidation treatment of landfill leachate technology experimental results by electrochemical oxidation electrolysis parameters, determine treatment the leachate recommended programs: the aerobic, Chairman oxygen recharge electrochemical oxidation process, in which the electrochemical oxidation electrolysis parameter design are shown in Table:

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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