Anaerobic granular sludge process for carbohydrate fermentation at low pH

摘要：

　　In this study we investigated the anaerobic granular sludge process for glucose fermentation at low pH.A lab-scale anaerobic sequencing batch reactor (ASBR) was fed with 10.5 g/l glucose and operated anaerobically at a pH controlled at 3.5 and 4.0.The reactor was operated in cycles of 3 hours with a settling phase of 2 minutes in order to select for granular sludge.The obtained product spectrum at pH 4.0 was significantly different from that observed at pH 4.5-5.5 with ethanol as the main product instead of carboxylic acids.Ethanol production could be tributed to the dominant presence of yeast cells in the granular sludge.Control of the product spectrum of anaerobic fermentations enables specific resource recovery processes on prefermented industrial wastewater: Ethanol is a suitable substrate for medium chain length fatty acids (MCFA) production,whereas high carboxylic acid concentrations favour PHA biopolymer production.

关键词： Mixed culture fermentation granular sludge ethanol resource recovery

作者: Jelmer Tamis Bart Joosse Robbert Kleerebezem

作者单位: Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ, the Netherl Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, 2629 HZ, the Netherl

会议类型: 国际会议

会议名称: The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)

会议地点: 北京

会议语种:英文

页码: 665-666

在线出版日期: 2017-10-17（万方平台首次上网日期，不代表论文的发表时间）