化工学报2012，Vol.63Issue(3)：935-940,6.DOI:10.3969/j.issn.0438-1157.2012.03.037
高底物浓度纤维乙醇同步糖化发酵工艺的比较
Comparative study on processes of simultaneous saccharification and fermentation with high solid concentration for cellulosic ethanol production
摘要
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.关键词
乙醇/同步糖化发酵/玉米秸秆/真空分离Key words
ethanol/simultaneous saccharification and fermentation/corn stalk/vacuum separation分类
化学化工引用本文复制引用
常春,王铎,王林风,马晓建..高底物浓度纤维乙醇同步糖化发酵工艺的比较[J].化工学报,2012,63(3):935-940,6.基金项目
国家"十一五"科技支撵项目(2007BAD66B04) （2007BAD66B04）
国家自然科学基金项目(21176227). （21176227）
