电混凝/化学混凝预处理渗滤液减缓反渗透膜污染  

Pretreatment of Leachate with Electro-coagulation and Chemical Coagulation for Mitigating RO Membrane Fouling

作　　者：曾晓岚[1,2] 李堃宇 丁文川[1,2] 胡学斌[1,2] 韩乐[1,2] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]重庆大学低碳绿色建筑国际联合研究中心,重庆400045

出　　处：《中国给水排水》2016年第21期86-89,95,共5页China Water & Wastewater

基　　金：重庆市自然科学基金资助项目(2011BB7099);高等学校学科创新引智计划(B13041)

摘　　要：为促进反渗透膜的推广应用,利用超滤法、三维荧光光谱法对经电混凝和化学混凝处理前后的渗滤液的分子质量分布和荧光强度进行了分析,考察了预处理减缓反渗透膜污染的机理。研究结果表明,电混凝和化学混凝对渗滤液中分子质量<1 ku有机物的去除率分别为64.2%和14.7%;对可见光区类富里酸的去除率分别为50.6%和23.6%,对紫外光区类富里酸的去除率分别为36.3%和17.8%。与化学混凝相比,电混凝对主要构成膜污染的分子质量较小的有机物和类富里酸物质有明显去除效果。In order to promote the application of RO membrane, the molecular weight distribution and fluorescence intensity of the leachate pretreated by electro-coagulation and chemical coagulation were analyzed using ultrafiltration process and three-dimensional fluorescence spectrometry. The mechanism for mitigating RO membrane removal rates of organic fouling by leachate pretreatment was investigated. The results showed that the matter with molecular mass of less than 1 ku, visible fulvic acid and UV fulvic acid in the leachate pretreated by electro-coagulation and chemical coagulation were 64.2% and 14.7%, 50.6% and 23.6%, 36. 3% and 17.8%, respectively. Compared with chemical coagulation, the organ- ic matter with small molecular weight and fulvic acids as the main compositions of membrane fouling could obviously be removed by electro-coagulation.

关 键 词：电混凝 化学混凝 垃圾渗滤液 反渗透膜污染 预处理 

分 类 号：X703[环境科学与工程—环境工程]