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- Title
Cause analysis of the effects of acid-catalyzed steam-exploded corn stover prehydrolyzate on ethanol fermentation by Pichia stipitis CBS 5776.
- Authors
Zhu, Junjun; Yang, Jinlong; Zhu, Yuanyuan; Zhang, Lingling; Yong, Qiang; Xu, Yong; Li, Xin; Yu, Shiyuan
- Abstract
The prehydrolyzate obtained from acid-catalyzed steam-exploded corn stover (ASC) mainly contains xylose and a number of inhibitory compounds that inhibit ethanol fermentation by Pichia stipitis. In this study, the effects of the ASC prehydrolyzate, specifically those of the carbohydrate-degradation products, lignin-degradation products (which were extracted from ASC prehydrolyzate using ethyl acetate), and six major phenolic compounds (added to pure-sugar media individually or in combination), on ethanol fermentation were investigated. Results indicate that the effects of the carbohydrate-degradation products were negligible (10 h delayed) compared with those of pure-sugar fermentation, whereas the effects of the lignin-degradation products were significant (52 h delayed). Meanwhile, the inhibitory effects of the major phenolic compounds were not caused by certain types of inhibitors, but were due to the synergistic effects of various inhibitors.
- Subjects
ACID catalysts; CORN stover; ETHANOL; FERMENTATION; PICHIA stipitis; PHENOLS
- Publication
Bioprocess & Biosystems Engineering, 2014, Vol 37, Issue 11, p2215
- ISSN
1615-7591
- Publication type
Article
- DOI
10.1007/s00449-014-1199-0