Document Detail

Extracellular biological organic matters in sewage sludge during mesophilic digestion at reduced hydraulic retention time.
MedLine Citation:
PMID:  21126748     Owner:  NLM     Status:  In-Process    
To operate an anaerobic digester at low hydraulic retention time (HRT) is welcome in practice. This study characterized the extracellular biological organic matter (EBOM) and supernatant organics for a sewage sludge digested in a lab-scale mesophilic digester (5 l) running at an HRT of 20, 15 or 10 d. The hydrophilic and hydrophobic acid fractions were the principal components in the sludge EBOM. The hydrolysis rates for hydrophobic acid fraction related EBOM at 10 d HRT and that of hydrophilic fraction related proteins in supernatant at 20 d HRT limited the anaerobic processes. Improved hydrolysis of soluble hydrophilic fraction assisted improving digester performance at 20 d HRT. To shorten digestion HRT, efficiency of hydrophobic acid fraction hydrolysis has to be practiced.
Liang-Liang Wei; Qing-Liang Zhao; Kai Hu; Duu-Jong Lee; Chun-Mei Xie; Jun-Qiu Jiang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-11-10
Journal Detail:
Title:  Water research     Volume:  45     ISSN:  1879-2448     ISO Abbreviation:  Water Res.     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-01-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  1472-80     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Ltd. All rights reserved.
School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
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