The effect of the transformation of bubble size and flow pattern on the hollow fiber membrane microfiltration

摘要：

In the submerged hollow fiber membrane microfiltration, the shear near the membrane surface induced by the gas bubbling can effectively restrain the formation of the fouling layer. Using yeast as model particle in water, the performance of submerged hollow fiber membrane module was tested by measuring the transmembrane pressure under constant flux. It was found that the nozzle size greatly affected the size and shape of created bubbles, and with the increase of the nozzle size and after exceeding one threshold value, the gas flow pattern transformed from bubble flow to the single bullet-shaped slug flow. The observed membrane fouling performance coincided with the observed two-phase flow characteristics and the results of critical flux experiments.

关键词： Gas bubbling Submerged hollow fiber membrane module Microfiltration Membrane fouling

作者: Yan Lu Zhongwei Ding Liying Liu Zhijun Wang

作者单位: College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

会议类型: 国际会议

会议名称: The 5th International Conference on Separation Science and Technology(第五届国际分离科学与技术会议)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-10-14（万方平台首次上网日期，不代表论文的发表时间）