微电解法去除老龄渗滤液中有机污染物的特性

Performances of Micro-electrolysis for Decomposing Organic Pollutions in Stabilized Landfill Leachate

采用微电解法对老龄垃圾渗滤液进行预处理,研究了最佳工艺条件并分析了微电解法去除垃圾渗滤液中有机污染物的特性.结果表明:最佳条件为pH为4,铁屑与活性碳体积比为1∶2,反应时间为1.5h.在上述工艺条件下,对老龄渗滤液中的化学需氧量和难降解有机物去除率分别为84.5%和89.9%.经微电解法预处理后,出水的可生化系数增加了116.6%,难降解有机物的相对含量降低了32.8%.

A micro-electrolysis procedure for decomposing organic pollutions in stabilized landfill leachate pretreatment was optimized, and performances of the procedure were investigated. The results showed that the optimal pH was 4.0, the volume fraction of cast iron scraps to that of granular active carbon was 1 ： 2, and the reaction time was 1.5 h. Under the optimal procedure, the removal rates of chemical oxygen demand （COD） and refractory organic chemicals of stabilized landfill leachate were 84. 5% and 89. 9%, respectively. After the pretreatment by micro-electrolysis method, the biodegradablity coefficient of the leachate increases by 116.6%, and the concentration of refractory organic chemicals in the leachate decreases by 32.8%