膜科学与技术

膜孔反洗流剪切力表征膜污染变化规律探究

作者：王建涛，王湛

单位：北京工业大学环境与化学工程学院，化学化工系，绿色催化与分离北京市重点实验室，北京100124

关键词：错流微滤反洗；污染层平均孔径；膜孔内剪切力；可逆污染阻力

出版年,卷(期):页码： 2020,40(4):25-33

摘要：

本研究采用孔径为0.2μm聚偏氟乙烯（PVDF）平板微滤膜对酵母悬浮液进行了错流过滤与反洗。研究了在反洗过程中污染层平均孔径（df）、膜孔内剪切力（τ）和可逆污染阻力（Rr）的变化规律，并对比了有无反洗情况下的df变化。结果表明：df、τ和Rr均随着周期的增加而减小。df随着过滤压力（TMP）、流速、反洗时间和强度的增加而增大，随着浓度的增加而减小。当1700

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

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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