期刊
BIORESOURCE TECHNOLOGY
卷 100, 期 3, 页码 1399-1405出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2008.09.014
关键词
Activated sludge; Aerobic dynamic feeding; Carbon source; Excess sludge fermentation; Polyhydroxyalkanoates
资金
- The Hong Kong Government Research Grant Council [5167/04E]
- The Harbin Institute of Technology
- The Hong Kong Polytechnic University
To reduce the production cost of polyhydroxyalkanoates (PHA) and disposal amount of excess sludge Simultaneously, the feasibility of using fermentative volatile fatty acids (VFAs) as carbon sources to synthesize PHA by activated sludge was examined. At pH 11.0, 60 degrees C and fermentative time of 7 d, the VFAs; yield was 258.65 mgTOC/gVSS. To restrain cell growth during PHA production, the released phosphorus and residual ammonium in the fermentative VFAs was recovered by the formation of struvite precipitation. Acetic acid was the predominant composition of the fermentative VFAs. PHA accumulation in excess sludge occurred feeding by fermentative VFAs with aerobic dynamic feeding process. The maximum PHA content accounted for 56.5% of the dry cell. It can be concluded from this study that the VFAs generated from excess sludge fermentation were a suitable carbon source for PHA production by activated sludge. Crown Copyright (c) 2008 Published by Elsevier Ltd. All rights reserved.
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