期刊
BIORESOURCE TECHNOLOGY
卷 107, 期 -, 页码 405-410出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.12.083
关键词
Jatropha hull; 2.3-Butanediol; Acid hydrolysis; Fermentation; Klebsiella oxytoca
资金
- Chinese Academy of Sciences [KSCX2-YW-G-075]
- Yunnan Provincial Government (Baiming Haiwai Gaocengci Rencai Jihua)
- China National Natural Science Foundation [21076220]
Jatropha hulls were successfully for the first time used as raw materials for the production of 2,3-butanediol via dilute sulfuric acid hydrolysis and fermentation with Klebsiella oxytoca. Two-step hydrolysis was used to effectively hydrolyze the hulls at 150 degrees C after pretreatment. In the first-step, hemicellulose was hydrolyzed under mild conditions (0.5 h, 1.5% acid) to avoid secondary decomposition. The remained cellulose was further hydrolyzed in the second-step under severer conditions (1 h, 4% acid). After hydrolysis, total hydrolysis yield was 64%, which was much higher than that (37%) from the first-step. Maximum yields of 2,3-butanediol and acetoin in flask experiments were 35.6% and 41.4% from the hydrolysates of the first- and second-step hydrolysis, equivalent to 71.2% and 82.8% of the theoretical values, respectively. Similar yields were obtained in a controlled bioreactor but with higher productivities. Jatropha hulls are attractive raw materials for the production of 2,3-butanediol with high yield. (C) 2011 Elsevier Ltd. All rights reserved.
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