Research on the operation of cathode loaded electro-coagulation-dynamic membrane reactor

doi:10.11894/1005-829x.2018.38(8).038

Abstract

Abstract: The combination of electro-coagulation with dynamic membrane technology has been used for treating mi-cro-polluted water. The operation characteristics of electro-coagulation-dynamic membrane reactor(EC-DMR) and cathode loaded electro-coagulation-dynamic membrane reactor(CLEC-DMR) have been investigated. The results show that CLEC-DMR has better removing effects on suspended particles and humic acid. It is known through the dy-namic membrane forming process and typical filtration model fitting that the electric repulsive and buoyancy effect of CLEC-DMR have a certain facilitating effect on the formation of dynamic membranes. Further research shows that the membrane-cathode induced equivalent backwashing effect and air-flotation have changed the structure of dyna-mic membrane. Moreover,membrane resistance distribution experiments and SEM analysis show that the CLEC-DMR formed dynamic membrane is looser and can remarkably slow down the membrane fouling rate.

Key words: cathode loaded membrane, electro-coagulation-dynamic membrane, filtration model, membrane fouling, membrane resistance

摘要： 利用电絮凝与动态膜技术相结合处理微污染水，研究了电絮凝动态膜反应器（EC-DMR）及阴极负载电絮凝动态膜反应器（CLEC-DMR）的运行特性。结果表明，CLEC-DMR对悬浮颗粒及腐殖酸有更好的去除效果。通过动态膜形成过程与经典过滤模型拟合可知，CLEC-DMR中的电斥力及浮力作用对动态膜形成有一定促进作用。进一步研究表明，膜阴极诱发的等效反冲洗作用及气浮改变了动态膜结构。膜阻力分布实验及SEM分析表明，CLEC-DMR形成的动态膜更加疏松，显著延缓了膜污染速率。

关键词: 阴极负载膜, 电絮凝动态膜, 过滤模型, 膜污染, 膜阻力

CLC Number:

O646
X703

Zhang Wenjia, Zhang Wanyou, Zhang Haifeng. Research on the operation of cathode loaded electro-coagulation-dynamic membrane reactor[J]. INDUSTRIAL WATER TREATMENT, 2018, 38(8): 38-43,49.

张文佳, 张万友, 张海丰. 阴极负载电絮凝动态膜反应器运行研究[J]. 工业水处理, 2018, 38(8): 38-43,49.

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https://www.iwt.cn/EN/Y2018/V38/I8/38

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