| Literature DB >> 20970922 |
Zhenggui Liu1, Yuanpeng Wang, Ning He, Jiale Huang, Kang Zhu, Wenyao Shao, Haitao Wang, Weilong Yuan, Qingbiao Li.
Abstract
In this study, a high value-added and biodegradable thermoplastic, polyhydroxybutyrate (PHB), was produced by excess activated sludge. The effects of the nutritional condition, aeration mode, sodium acetate concentration and initial pH value on PHB accumulation in the activated sludge were investigated. The maximum PHB content and PHB yield of 67.0% (dry cell weight) and 0.740gCODgCOD(-1) (COD: chemical oxygen demand), respectively, were attained by the sludge in the presence of 6.0gL(-1) sodium acetate, with an initial pH value of 7.0 and intermittent aeration. The analysis of the polymerase chain reaction (PCR)-denaturing gradient-gel-electrophoresis (DGGE) sequencing indicated that the microbial community of the sludge was significantly different during the process of PHB accumulation. Three PHB-accumulating microorganisms, which were affiliated with the Thauera, Dechloromonas and Competibacter lineages, were found in the excess activated sludge under different operating conditions for PHB accumulation.Entities:
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Year: 2010 PMID： 20970922 DOI： 10.1016/j.jhazmat.2010.08.003
Source DB: PubMed Journal: J Hazard Mater ISSN： 0304-3894 Impact factor: 10.588