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Frontiers of Environmental Science & Engineering

ISSN 2095-2201

ISSN 2095-221X(Online)

CN 10-1013/X

Postal Subscription Code 80-973

2018 Impact Factor: 3.883

Front.Environ.Sci.Eng.    2010, Vol. 4 Issue (3) : 272-279    https://doi.org/10.1007/s11783-010-0234-x
Research articles
A hybrid membrane process for simultaneous thickening and digestion of waste activated sludge
Zhiwei WANG,Qiaoying WANG,Zhichao WU,Xinhua WANG,
State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;
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Abstract A hybrid membrane process for simultaneous sludge thickening and digestion (MSTD) was studied. During one cycle (15 d) of operation under a hydraulic retention time of 1 d, the concentration of mixed liquor suspended solids (MLSS) continuously increased from about 4 g·L−1 to 34 g·L−1, and the mixed liquor volatile suspended solids (MLVSS) increased from about 3 g·L−1 to over 22 g·L−1. About 42% of the MLVSS and 39% of the MLSS reduction were achieved. The thickening and digestion effects in the MSTD were further analyzed based on a mass balance analysis. Test results showed that biopolymers and cations of biomass were gradually released to the bulk solution during the process. It was also found that the capillary suction time, colloidal chemical oxygen demand, soluble microbial products, viscosity, and MLSS had significant positive correlations with the membrane fouling rate, whereas extracellular polymeric substances, polysaccharides, and proteins extracted from biomass had negative impacts on membrane fouling.
Keywords membrane filtration      sludge digestion      sludge thickening      waste activated sludge      
Issue Date: 05 September 2010
 Cite this article:   
Zhiwei WANG,Zhichao WU,Qiaoying WANG, et al. A hybrid membrane process for simultaneous thickening and digestion of waste activated sludge[J]. Front.Environ.Sci.Eng., 2010, 4(3): 272-279.
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https://academic.hep.com.cn/fese/EN/10.1007/s11783-010-0234-x
https://academic.hep.com.cn/fese/EN/Y2010/V4/I3/272
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