化工学报 ›› 2012, Vol. 63 ›› Issue (3): 935-940.DOI: 10.3969/j.issn.0438-1157.2012.03.037

• 能源和环境工程 • 上一篇    下一篇

高底物浓度纤维乙醇同步糖化发酵工艺的比较

常春1,王铎1,2,王林风2,马晓建1   

  1. 郑州大学化工与能源学院;2河南天冠企业集团有限公司
  • 收稿日期:2011-07-18 出版日期:2012-03-05 发布日期:2012-03-05
  • 通讯作者: 常春

Comparative study on processes of simultaneous saccharification and fermentation with high solid concentration for cellulosic ethanol production

CHANG Chun1,WANG Duo1,2,WANG Linfeng2,MA Xiaojian1   

  • Received:2011-07-18 Online:2012-03-05 Published:2012-03-05

关键词: 乙醇, 同步糖化发酵, 玉米秸秆, 真空分离

Abstract: The effects of various simultaneous saccharification fermentation (SSF) technologies on ethanol yield from cellulose were investigated. Using steam-exploded corn stalks as raw materials, five SSF technologies, including traditional SSF, SSF combined with preliminary enzymatic hydrolysis,fed-batch SSF coupled with preliminary enzymatic hydrolysis,SSF united with preliminary enzymatic hydrolysis coupling with vacuum separation and fed-batch SSF associated with preliminary enzymatic hydrolysis coupling with vacuum separation,were used for decomposition of the stalks. By comparing the fermentation process with higher solid concentration including 15% (mass) and 30% (mass), it was found that the fed-batch SSF combined with preliminary enzymatic hydrolysis is an effective way for raising substrate concentration. However, higher substrate concentration may lead to decrease of final ethanol yield. Moreover, SSF coupled with vacuum separation can weaken the product inhibition, and increase the ethanol yield. The ethanol productivity by the fed-batch SSF associated with preliminary enzymatic hydrolysis coupling with vacuum separation is 0.40 g·L-1·h-1,the highest value obtained,indicating that this technology can be a potential new technology.

Key words: ethanol, simultaneous saccharification and fermentation, corn stalk, vacuum separation

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