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Study on the variation of membrane fouling characterized by the shear force of membrane pore backwash flow

Authors： WANG Jiantao, WANG Zhan

Units： Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering Beijing University of Technology, Beijing 100124 P.R. China

KeyWords： Cross-flow microfiltration backwash; Average pore size of fouling layer; Shear force in membrane pore; Reversible fouling resistance.

ClassificationCode：TQ 028.8

year,volume(issue):pagination： 2020,40(4):25-33

Abstract：

In this study, cross-flow filtration and backwash of yeast suspension were carried out using a polyvinylidene fluoride (PVDF) plate microfiltration membrane with a pore diameter of 0.2 μm. The variations of the average pore size of fouling layer(df), the shear force in the membrane pores(τp) and the reversible fouling resistance (Rr) during the backwash process were studied. And the df changes with and without backwash were compared. The results showed that the df, τp and Rr decrease with increasing period. The df increases with TMP, flow velocity, backwash duration and backwash strength, and decreases with increasing concentration. When 1700

Funds：

国家自然科学基金（21476006）

AuthorIntro：

第一作者简介：王建涛（1994－），男，重庆市人，硕士，从事膜清洗与纳滤膜制备研究，E-mail：wang_jiant@163.com. 通讯作者，电话：010-67396186，传真：010-67396186，E-mail：wangzhan3401@163.com.

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