Ozonation pretreatment for ultrafiltration of the

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• Affiliation of Author(s):环境与市政工程学院
• Journal:Journal of Membrane Science
• Key Words:中文关键字：臭氧预氧化;AMWD;膜阻力;膜污染;二级处理水，英文关键字：Preozonization;AMWD;membrane resistance;fouling
• Abstract:This study used secondary effluent as raw water, the apparent molecular weight distribution (AMWD) of organic substances in water was changed with preozonization, and flat polyvinylidenefluoride (PVDF) UF membrane with molecular weight cut-off (MWCO) 30 kDa was adopted to filtrate the raw water with different AMWD of organic substances. Then the influence of AMWD of organic substances in water on membrane resistances was discussed. The results showed preozonization could effectively improve the biodegradability of secondary effluent, the AMWD of organic substances in water was different in different ozone contact time, the AMWD of organic substances had great influence on membrane resistances, and blocking and cake layer resistances had controlling force over fouling resistance, the relationship between AMWD of organic substances and membrane resistances went as follows (i) when d/φ＜2/15 (d: molecular weight of the organic substances in water,φ: membrane pore size), the organic substances could easily permeate the membrane pore, and when 2/15< d/φ<1/3, the organic substances tended to be adsorbed in the inside of membrane pore; (ii) when 1/3< d/φ<1, the organic substances mainly caused the interior membrane pore blocking, and when 1< d/φ<5/3, the organic substances mainly caused the block in membrane surface; (iii) when d/φ＞1, especially when d/φ＞5/3, the organic substances mainly formed the membrane surface cake.
• Note:SCI检索 资助项目为：用膜结构和溶解性有机物的分子量分布解析并评价膜污染的研究（国家自然科学基金项目，编号50308023）
• Co-author:刘莹,段文松
• First Author:wanglei,wangxudong
• Indexed by:Journal paper
• Volume:卷：287
• Issue:期：2
• Page Number:页：187-191
• Translation or Not:no
• Date of Publication:2007-01-01