电解氧化处理垃圾渗滤液研究

Study on Electrolytic Oxidation for Landfill Leachate Treatment

采用电解氧化法对垃圾渗滤液进行深度处理的研究结果表明 ,电解氧化过程中 ,NH3-N优先于COD被氧化去除 ;SPR三元电极的处理效果优于DSA二元电极和石墨电极 ;酸性条件比碱性条件更有利于电解氧化作用对COD及NH3-N的去除 ;Cl- 浓度高时 ,有利于COD及NH3-N被氧化去除。试验得到的适宜电解氧化条件是 :pH值为 4、Cl- 浓度为 50 0 0mg/L、电流密度为10A/dm2 、SPR三元电极为阳极、电解时间为 4h。当COD及NH3-N浓度分别为 6 93mg/L和 2 6 3mg/L时 ,COD去除率为 90 .6 % ,NH3-N的去除率为 10 0 %。

A study on electrolytic oxidation process was made for advanced treatment of landfill leachate. The result shows that in the process of electrolytic oxidation, removal of NH 3-N is preferential to that of COD, and the performance of the process by using SPR as anode is superior to that by using DSA and graphite. COD and NH 3-N can be removed more effectively in acidic environment than in basic one. High concentration of Cl- is beneficial to the removal of COD and NH 3-N. As obtained from the test, the suitable condition for the technology is: pH 4, Cl- concentration of 5 000 mg/L,electrical density 10 A/dm2, anode used for SPR, and electrolytic period 4 h. At COD concentration of 693 mg/L and NH 3-N 263 mg/L, 90.6% and 100% can be achieved respectively for the removal of COD and NH 3-N.