Document Detail


Influence of operating conditions on extracellular polymeric substances and surface properties of sludge flocs.
MedLine Citation:
PMID:  23218328     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Extracellular polymeric substances (EPSs) originating from the metabolism or lysis of microorganisms play important roles in biological wastewater treatment. It is necessary to understand the correlation between EPSs and the reactor operation and sludge-retention time (SRT) of the activated-sludge process to gain efficient operational strategies. Laboratory-scale completely mixed activated-sludge processes were used to grow the activated sludge with starch or glucose. Two modes of reactor operation, the S-mode and B-mode, were investigated. The results showed that polysaccharides and proteins were the main constituents in the EPSs. The percentage of polysaccharides (PSs) and proteins (PNs) in the loosely bound EPSs (LB-EPSs) and tightly bound EPSs (TB-EPSs) were 18-90% and 18-85%, respectively. The LB-EPS content was related to the operation modes and SRT. The LB-EPS contents in B-mode were triple that of S-mode, and the LB-EPS yield of sludge decreased at an increased SRT. The polysaccharides and proteins in the LB- and TB-EPSs were both dependent on the operation modes and SRT.
Authors:
Hongwu Wang; Huanhuan Deng; Luming Ma; Liyun Ge
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Publication Detail:
Type:  Journal Article     Date:  2012-10-02
Journal Detail:
Title:  Carbohydrate polymers     Volume:  92     ISSN:  1879-1344     ISO Abbreviation:  Carbohydr Polym     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2012-12-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8307156     Medline TA:  Carbohydr Polym     Country:  England    
Other Details:
Languages:  eng     Pagination:  510-5     Citation Subset:  IM    
Copyright Information:
Crown Copyright © 2012. Published by Elsevier Ltd. All rights reserved.
Affiliation:
The State Engineering Research Center for Municipal Pollution Control under the College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, PR China. Electronic address: wanghongwu@mail.tongji.edu.cn.
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