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Application of microfiltration membranes prepared via co-casting in clarification of suspended solution

Authors： ZHANG Yunyan, JI Yu, Sui Bo2, LI Xuemei, YIIN Yong, LI Gang, WANG Zhouwei, HE Tao*

Units： State-Key Lab of Material Oriented Chemical Engineering, College of Chemistry and Chemical Engineering,

KeyWords： polysulfone; microfiltration; crossflow filtration; suspension

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2010,30(6):0-0

Abstract：

Abstract:This report described the application of microfiltration PSf membrane in clarification of highly suspended solution. The PSf membrane was prepared via a co-casting technique. The effects of CaCO3 particle concentration ,particle diameter, membrane initial permeability, reversal of filtration surface of the membrane on the filtration performance were investigated. Results showed that the initial water permeability has no significant effect on the filtration stability. The particle concentrations controlled the steady membrane permeability. In case the particle diameter is lower than the membrane pore size, the pore blockage leads to drastic decline in permeability; however, when particle diameter is larger than the membrane pore size, cake formation is the main reason for the permeability degradation. Reversing the filtration surface, the filtration using top surface showed slightly higher permeability than bottom surface. In beer filtration, open surface PSf membrane evidently showed advantage against 0.4 mm PES membranes. Results indicate that the open surface PSf membranes are suitable for clarification of highly suspended solution, for example suspension with particles or bacteria, beer, wine or active sludge.

Funds：

国家重大基础研究973项目(No.2009CB623402), 材料化学工程国家重点实验室基金(No.38901120), 自然科学基金（No. 20976083）

AuthorIntro：

张云燕（1987-）,女,甘肃白银市人,硕士研究生,主要从事膜萃取技术研究

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