Alkaline peroxide pretreatment of rapeseed straw for enhancing bioethanol production by Same Vessel Saccharification and Co-Fermentation

被引：93

作者：

Karagoz, Pinar ^{[1
,2
]}

Rocha, Indre V. ^{[2
]}

Ozkan, Melek ^{[1
]}

Angelidaki, Irini ^{[2
]}

机构：

[1] Gebze Inst Technol, Dept Environm Engn, TR-41400 Gebze, Turkey

[2] Tech Univ Denmark, Dept Environm Engn, DK-2800 Kongens Lyngby, Denmark

来源：

BIORESOURCE TECHNOLOGY | 2012年 / 104卷

关键词：

Rapeseed straw; Bioethanol; Co-fermentation; Same Vessel Saccharification and Fermentation (SVSF); EXPLODED WHEAT-STRAW; ETHANOL-PRODUCTION; SACCHAROMYCES-CEREVISIAE; ENZYMATIC-HYDROLYSIS; SUGARCANE BAGASSE; PICHIA-STIPITIS; SSF PROCESSES; GLUCOSE; XYLOSE; COCULTURE;

D O I：

10.1016/j.biortech.2011.10.075

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Alkaline peroxide pretreatment of rapeseed straw was evaluated for conversion of cellulose and hemicellulose to fermentable sugars. After pretreatment, a liquid phase called pretreatment liquid and a solid phase were separated by filtration. The neutralized pretreatment liquids were used in a co-fermentation process, with Saccharomyces cerevisiae and Pichia stipitis. The solid fraction was used for simultaneous saccharification and co-fermentation process in the same vessel. The effects of various operating variables were investigated. Pretreatment with 5% (v/v) H2O2 at 50 degrees C for 1 h was found to be the optimal pretreatment combination with respect to overall ethanol production. At this condition, 5.73 g ethanol was obtained from pretreatment liquid and 14.07 g ethanol was produced by co-fermentation of solid fraction with P. stipitis. Optimum delignification was observed when 0.5 M MgSO4 was included in the pretreatment mixture, and it resulted in 0.92% increase in ethanol production efficiency. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：349 / 357

页数：9

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