氧化预处理延缓超滤膜污染试验研究  

THE EFFECT OF PREOXIDATION ON ULTRAFILTRATION MEMBRANE FOULING MITAGATION

作　　者：桂学明[1] 李伟英[2] 赵勇[1] 刘亮[3] 华伟[4] 陈清5 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092 [2]同济大学长江水环境教育部重点实验室,上海200092 [3]苏州市水务局,江苏苏州215011 [4]苏州市自来水公司,江苏苏州215002

出　　处：《水处理技术》2011年第2期102-105,共4页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项课题(2008ZX07421-006);苏州市重点科技支撑项目(ZS0801)

摘　　要：分析了膜前氧化对超滤膜污染规律和水中有机组分构成的影响,并对延缓膜污染的机理与方法进行探讨。结果表明,试验所用3种氧化剂KMnO4、高锰酸钾复合盐(PPC)、H2O2均能延缓膜污染进程,在投加量为1 mg.L-1条件下,预处理效果PPC>KMnO4>H2O2;KMnO4和PPC对UV254的去除效果优于溶解性有机物,表明2种氧化剂优先去除含有双键的疏水性有机物;通过研究氧化剂投加量对比紫外吸光度变化的影响,说明氧化作用使水中腐殖质类成分向非腐殖质类成分转化。Membrane fouling has become one of the obstacles for a large-scale application of ultrafiltration （UF）. A bench-scale study was undertaken to evaluate the effect ofpreoxidation on UF membrane fouling and the composition of organic component .Furthermore, the mechanisms and methods to mitigate membrane fouling were examined. It was found that the three oxidants used in this study such as KMnO4, PPC and H2O2, can mitigate the membrane fouling process. The order ofpretreatment effect was PPC〉KMnO,〉H2O2 at dosage of 1 mg.L-1.The results also demonstrated that KMnO4 and PPC had a superiority in the removal of UV254 than that of DOC. This indicated that these two oxidants remove hydrophobic organics that with double bond preferentially. The effect of oxidant dosage on SUVA showed that humic substances were transformated into less- or non-humie substances during the oxidation.

关 键 词：膜污染 预氧化 超滤 有机物 

分 类 号：TQ028.8[化学工程]