Journal
SEPARATION SCIENCE AND TECHNOLOGY
Volume 45, Issue 7, Pages 920-927Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01496391003656974
Keywords
membrane bioreactor (MBR); membrane fouling; sludge characteristics; wastewater treatment
Funding
- Key Special Program on the S&T for the Pollution Control and Treatment of Water Bodies [2008ZX07316-002]
- S&T Commission of Shanghai [08231200200]
- Independent Research Fund of Chinese SKL of Pollution Control and Resource Reuse [PCRRY08005]
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Effects of temperature seasonal change on sludge characteristics and membrane fouling in a pilot-scale submerged membrane bioreactor (MBR) were studied. Results showed that bound extracellular polymeric substances (EPS), soluble chemical oxygen demand (SCOD), polysaccharides, and proteins in the supernatants all increased under low temperature operation. The increase of diluted sludge volume index (DSVI) and capillary suction time (CST) indicated that the settling and dewatering ability of mixed liquors deteriorated. It was also found that the increase of EPS, polysaccharides, and proteins led to the increase of biopolymers attached to membrane surfaces and in turn caused severe membrane fouling.
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