三维电极-电Fenton法去除垃圾渗滤液中有机物

采用三维电极-电Fenton法处理垃圾渗滤液，考察了垃圾渗滤液中有机物去除的影响因素及处理效果，优化了实验条件，并探讨了有机物的降解机理。结果表明，电流密度、极板间距、初始pH、Fe²⁺投加量、曝气量等参数对垃圾渗滤液中化学需氧量(COD)和总有碳量(TOC)的去除率均有一定的影响，其最佳运行参数为：电流密度57.1mA/cm²、极板间距10cm、初始pH为4.0、Fe²⁺ 投加量1mmol/L、曝气量0.2m³/h，在此条件下，COD和TOC的去除率分别达80.80%和73.26%。气相色谱-质谱联用仪(GC-MS)定性分析结果显示，电解对垃圾渗滤液中芳烃、烷烃、羧酸、酯类等主要有机物具有很好的去除效果，可生化性(BOD5/COD)从电解前的0.125增大到0.486，有利于后续的生化处理。

Removal of organic compounds from landfill leachate by a three-dimensional-electrode electro-Fenton process

Landfill leachate has been treated by a three-dimensional-electrode electro-Fenton process.The factors affecting the removal efficiency of organic compounds were studied,the experimental conditions were optimized and the degradation mechanism of the organic compounds is discussed.The results showed that the optimal operating parameters were as follows:current density of 57.1 mA/cm2,electrode distance of 10 cm,initial pH 4.0,dosage of Fe2 of 1 mmol/L,and airflow of 0.2 m3/h.Under these conditions,the COD and TOC removal efficiencies reached 80.80% and 73.26%,respectively.The results of qualitative analysis by GC-MS indicated that the main organic compounds such as aromatic hydrocarbons,alkanes,carboxylic acids and esters were removed effectively by electrolysis.The biodegradability(ratio of BOD5 to COD)was improved from 0.125 to 0.486,which should be of benefit in the subsequent biochemical process.