Decomposition of EPS on the membrane surface and its influence on the fouling mechanism in MBRs

被引：17
|
作者：
Nagaoka, H. [1 ]
Akoh, H. [1 ]
机构：
[1] Musashi Inst Technol, Dept Civil Engn, Setagaya Ku, Tokyo 1588557, Japan
来源：
DESALINATION | 2008年 / 231卷 / 1-3期
关键词：
MBR; EPS; Fouling;
D O I：
10.1016/j.desal.2007.12.007
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
This study is aimed at elucidating the mechanism of the chan-e of molecular weight distribution of EPS by bacterial activities after being attached on the membrane Surface and the influence of EPS on the membrane surface on membrane fouling in a laboratory-scale MBR reactor. Change of EPS amount after accumulation on the membrane Surface was measured Under a non-substrate-fed condition. High molecular weight EPS (more than 1,000 kDa) accumulated on the membrane Surface was found to be decomposed to smaller molecular-weight EPS and was finally mineralised decreasing the filtration resistance of the membrane. This natural recovery mechanism from fouling was explained by a mathematical model considering the production and decomposition of high- and low-molecular weight EPS on the membrane Surface.
引用
收藏
页码：150 / 155
页数：6
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