期刊
BIOTECHNOLOGY PROGRESS
卷 35, 期 2, 页码 -出版社
WILEY
DOI: 10.1002/btpr.2753
关键词
prehydrolysate; inhibitors; flocculation; co-culture; butanol
资金
- College-University I2I Program of the Natural Sciences and Engineering Research Council of Canada (NSERC) [437803-12]
- NSERC Discovery Grant [380070-08]
Butanol, a fuel with better characteristics than ethanol, can be produced via acetone-butanol-ethanol (ABE) fermentation using lignocellulosic biomass as a carbon source. However, many inhibitors present in the hydrolysate limit the yield of the fermentation process. In this work, a detoxification technology combining flocculation and biodetoxification within a bacterial co-culture composed of Ureibacillus thermosphaericus and Cupriavidus taiwanensis is presented for the first time. Co-culture-based strategies to detoxify filtered and unfiltered hydrolysates have been investigated. The best results of detoxification were obtained for a two-step approach combining flocculation to biodetoxification. This sequential process led to a final phenolic compounds concentration of 1.4g/L, a value close to the minimum inhibitory level observed for flocculated hydrolysate (1.1g/L). The generated hydrolysate was then fermented with Clostridium acetobutylicum ATCC 824 for 120 h. A final butanol production of 8 g/L was obtained, although the detoxified hydrolysate was diluted to reach 0.3 g/L of phenolics to ensure noninhibitory conditions. (c) 2018 American Institute of Chemical Engineers Biotechnol. Prog., 35: e2753, 2019.
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