Membrane fouling related to microbial community and extracellular polymeric substances at different temperatures

被引：69
作者：
Gao, Da-Wen [1 ,2 ]
Wen, Zhi-Dan [1 ]
Li, Bao [1 ]
Liang, Hong [2 ]
机构：
[1] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
[2] Northeast Forestry Univ, Sch Forestry, Harbin 150040, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2013年 / 143卷
基金：
中国国家自然科学基金;
关键词：
Membrane fouling; Microbial community; Extracellular polymeric substances; Soluble microbial products; Membrane bioreactor; WASTE-WATER TREATMENT; ACTIVATED-SLUDGE; BIOREACTOR; PERFORMANCE; IMPACT; MBR;
D O I：
10.1016/j.biortech.2013.05.127
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
An anoxic aerobic membrane bioreactor was established to investigate the role of microorganisms and microbial metabolites in membrane fouling at different temperatures. The results showed that the membrane fouling cycle at 303, 293, and 283 K were 30, 29, and 5.5 days, respectively. Polysaccharides dominated the extracellular polymeric substances (EPS) and soluble microbial products (SMP) at 303 and 293 K, instead, proteins was the predominant composition of metabolites at 283 K. The correlation coefficient (r(2)) was calculated to identify the relationship between temperature (T), filtration resistance (R) and compositions of EPS and SMP. In biocake, the EPS polysaccharides (EPSc) was the most correlative factor to temperature (T) and filtration resistance (R); in mixed liquor, the ratio of SMP polysaccharides to proteins (SMPc/p) was the most correlative factor. The microbial community structure and the dominant species was the major reason causing the change of EPS and SMP composition. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：172 / 177
页数：6
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