Polyhydroxyalkanoate production from fermented volatile fatty acids: Effect of pH and feeding regimes

被引：107

作者：

Chen, Hong ^{[1
]}

Meng, Huijuan ^{[1
]}

Nie, Zuchao ^{[1
]}

Zhang, Mingmei ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Environm Engn, Coll Environm & Resource Sci, Hangzhou 310058, Zhejiang, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 128卷

关键词：

Waste fermentation; Volatile fatty acids; Polyhydroxyalkanoates; Biosynthesis; Waste management; WASTE ACTIVATED-SLUDGE; MIXED CULTURES; FOOD WASTES; POLYHYDROXYBUTYRATE; NITROGEN;

D O I：

10.1016/j.biortech.2012.10.121

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The combined fermentation of sludge from the secondary sedimentation tank of municipal wastewater treatment plants and food waste enables not only waste reduction, but also the acquisition of volatile fatty acids (VFAs) for the biosynthesis of polyhydroxyalkanoates (PHAs). To better understand variables influencing the production of VFAs and PHAs, this study considered anaerobic fermentation of VFAs under different pH conditions. The production of VFA was the highest at an initial pH of 9.0, reaching 25,934 +/- 1,485 mg COD/L and a VFAs/SCOD ratio of 0.61 +/- 0.04. When the fermentation liquid was used as a carbon source for PHA biosynthesis, continuous pulsed feeding resulted in the highest PHA synthesis rate of 64.5 +/- 1.8%, while the culture receiving a one-time feeding had the lowest rate of only 51.5 +/- 2.0%. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：533 / 538

页数：6

共 25 条

[1] Mixed culture polyhydroxyalkanoate (PHA) production from volatile fatty acid (VFA)-rich streams: Effect of substrate composition and feeding regime on PHA productivity, composition and properties [J].