摘要
通过对膜表面形貌的观察、不同清洗方法对膜通透性恢复效果的评价以及化学洗脱液的成份分析,对混凝-微滤膜工艺中的膜污染特征和膜污染的清洗进行了研究.结果表明,污染膜的外表面是微生物污染、有机污染和无机污染相互作用而形成的,内表面以微生物污染为主.碱洗能去除大部分的微生物和有机污染物,对膜内、外表面的清洗效果显著;而酸洗对膜表面的无机垢体清除效果较为显著.膜面溶解性有机污染物以小分子量为主,无机污染元素主要是Ca.
By observation of the surfaces of the membrane, evaluation of the recovery effect of the membrane permeability with various cleaning methods and analysis of the component of the chemical cleaning liquid, characteristics of membrane pollution and its cleaning in a coagulation-microfiltration combination process were studied. Results showed that the pollution on the exterior surface of membrane was formed by microorganism and the integrated action of inorganic and organic matters, while that on the inner surface, the pollution was mainly due to microorganism. Alkaline cleaning could remove most of the microorganism and organic pollutants formed on both the exterior and inner surfaces of the membrane with marked cleaning effect, while acid cleaning was more marked to remove the inorganic pollutants. The majority of soluble organic pollutants on the membrane surface had low molecular weight, and Ca was the major inorganic element.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2002年第3期258-262,共5页
China Environmental Science
基金
清华大学"985"重点项目(0821002600)
关键词
混凝-微滤膜
净水
工艺
膜污染
特征
清洗
废水处理
过滤
coagulation-microfiltration combination process
membrane pollution
membrane cleaning
water purification
