Linking microbial community structure to membrane biofouling associated with varying dissolved oxygen concentrations

被引：113

作者：

Gao, Da-wen ^{[1
,2
]}

Fua, Yuan ^{[1
]}

Tao, Yu ^{[1
]}

Li, Xin-xin ^{[1
]}

Xing, Min ^{[1
]}

Gao, Xiu-hong ^{[2
]}

Ren, Nan-qi ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China

[2] NE Forestry Univ, Sch Forestry, Harbin 150040, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2011年 / 102卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Biofouling; Dissolved oxygen; Extracellular polymeric substance; Microbial community; EXTRACELLULAR POLYMERIC SUBSTANCES; MUNICIPAL WASTE-WATER; BACTERIAL COMMUNITY; ACTIVATED-SLUDGE; BIOREACTORS; DENITRIFICATION; IDENTIFICATION; PERFORMANCE; PRODUCTS; BIOFILMS;

D O I：

10.1016/j.biortech.2011.02.039

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

In order to elucidate how dissolved oxygen (DO) concentration influenced the generation of extracellular polymeric substance (EPS) and soluble microbial products (SMP) in mixed liquor and biocake, 16S rDNA fingerprinting analyses were performed to investigate the variation of the microbial community in an aerobic membrane bioreactor (MBR). The function of microbial community structure was proved to be ultimately responsible for biofouling. Obvious microbial community succession from the subphylum of Betaproteobacteria to Deltaproteobacteria was observed in biocake. High concentration of EPS in biocake under the low DO concentration (0.5 mg L(-1)) caused severe biofouling. The correlation coefficient of membrane fouling rate with EPS content in biocake (0.9941-0.9964) was much higher than that in mixed liquor (0.6689-0.8004). (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：5626 / 5633

页数：8

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