pH对电化学氧化垃圾渗滤液的影响

主要研究了不同pH值对高氨氮垃圾渗滤液的电化学氧化的影响,重点考察了pH值在电解过程中的电解速率、电流效率、能耗以及三氯甲烷生成情况。结果表明:pH对电化学氧化垃圾渗滤液过程有重要的影响。在弱碱性条件下,电解垃圾渗滤液过程中氨氮及COD的降解速率、电流效率及能耗均要比在强酸、强碱条件下高,当pH为8.09时,经过6 h降解,氨氮的去除率达到100%,氨氮的降解速率为7 mg/(L.min),电流效率为45.23%,氨氮能耗为0.09kWh/g,COD的降解去除率达到50%,三氯甲烷产生的随着电解时间的增加而增加,电解6 h后三氯甲烷浓度从低于检测值升高至0.636 mg/L。

EFFECT OF pH VALUE ON ELECTROCHEMICAL OXIDATION OF LANDFILL LEACHATE

The effect of pH value on eletrochemical oxidation treatment of high ammonia nitrogen landfill leachate was studied.The electrochemical oxidation rate,current efficiency,energy consumption and generation of chloroform for the treatment landfill leachate by eletro-oxidation at different pH values were mainly discuessed.The results showed that the pH value had an important influence on electrochemical oxidation treatment of landfill leachate.In weak alkali conditions,the removal efficiency,oxidation rate,current efficiency and energy consumption of ammonia nitrogen were higher than in strong acid and strong alkali.After 6 h electrochemical oxidation treatment of landfill leachate with pH=8.09,the soid items were 100%,7 mg/(L·min),45.23%,0.09 kW·h/g NH+4-N,respectively,the removal efficiency of COD was 50%.The concentration of chloroform increased with electrolytic time,it reached 0.636mg/L from below detection value.