A viable method and configuration for fermenting biomass sugars to ethanol using native Saccharomyces cerevisiae

被引:9
作者
Yuan, Dawei [1 ]
Rao, Kripa [2 ]
Varanasi, Sasidhar [2 ]
Relue, Patricia [1 ]
机构
[1] Univ Toledo, Dept Bioengn, Toledo, OH 43606 USA
[2] Univ Toledo, Dept Chem & Environm Engn, Toledo, OH 43606 USA
基金
美国国家科学基金会;
关键词
Xylose; Xylulose; Simultaneous isomerization and fermentation; Hollow fiber; Saccharomyces cerevisiae; IONIC LIQUID PRETREATMENT; XYLOSE-ISOMERASE; FERMENTATION; YEAST; SACCHARIFICATION; ISOMERIZATION; TRANSPORTERS; EXPRESSION; KINETICS; GLUCOSE;
D O I
10.1016/j.biortech.2012.04.005
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
A system that incorporates a packed bed reactor for isomerization of xylose and a hollow fiber membrane fermentor (HFMF) for sugar fermentation by yeast was developed for facile recovery of the xylose isomerase enzyme pellets and reuse of the cartridge loaded with yeast. Fermentation of pre-isomerized poplar hydrolysate produced using ionic liquid pretreatment in HFMF resulted in ethanol yields equivalent to that of model sugar mixtures of xylose and glucose. By recirculating model sugar mixtures containing partially isomerized xylose through the packed bed and the HFMF connected in series, 39 g/l ethanol was produced within 10 h with 86.4% xylose utilization. The modular nature of this configuration has the potential for easy scale-up of the simultaneous isomerization and fermentation process without significant capital costs. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:92 / 98
页数:7
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