title: Cause analysis of the effects of acid-catalyzed steam-exploded corn stover prehydrolyzate on ethanol fermentation by Pichia stipitis CBS 5776.
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.
authors.affiliation: College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China, zhujj@njfu.edu.cn.
authors.forename: Junjun
authors.initials: J
authors.lastname: Zhu
authors.forename: Jinlong
authors.initials: J
authors.lastname: Yang
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Zhu
authors.forename: Lingling
authors.initials: L
authors.lastname: Zhang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Yong
authors.forename: Yong
authors.initials: Y
authors.lastname: Xu
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Shiyuan
authors.initials: S
authors.lastname: Yu
mesh_terms: D000143:Acids; D056804:Biofuels; D050260:Carbohydrate Metabolism; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation / Q000187:drug effects; D006868:Hydrolysis; D008031:Lignin / Q000378:metabolism; D010636:Phenols / Q000494:pharmacology; D010843:Pichia / Q000187:drug effects / Q000378:metabolism*; D013227:Steam; D014994:Xylose / Q000378:metabolism; D003313:Zea mays / Q000737:chemistry
chemical_list: D000143:Acids; D056804:Biofuels; D010636:Phenols; D013227:Steam; D000431:Ethanol; D008031:Lignin; D014994:Xylose