期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 16, 页码 7599-7602出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.05.028
关键词
Bio-flocs technology; Aquaculture wastewater; Poly-beta-hydroxybutyrate; Process optimization; Response surface methodology
资金
- national key scientific and technology project for water pollution treatment of China [2008ZX07316-002-04]
- science and technology specific project of Zhejiang province of China [2008C13007]
The bio-flocs technology (BET) was applied in the sequencing batch reactor (SBR) to treat aquaculture wastewater for flocs poly-beta-hydroxybutyrate (PHB) accumulation with alternant anaerobic and aerobic conditions. The statistical modeling approach was used to evaluate system performance and to optimize the flocs PHB yield at batch mode. The results show that all variables have significant impact on the response objective, as well as the interactions of the C/N ratio with the flocs biomass concentration (VSS) and anaerobic time, respectively. By process optimization, approximately 150-200 PHB/VSS (mg.g) of flocs PHB yield was achieved in the range of 4-7 g/l of flocs biomass concentration, 15-18 of the C/N ratio and 50-85 min of anaerobic time in the BFT systems. The results demonstrated that a suitable flocs PHB yield can be obtained via optimizing the ex-situ operating strategy, which have potential prebiotic value and practical implication for the sustainable aquaculture. (C) 2011 Elsevier Ltd. All rights reserved.
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