摘要
利用玉米秸秆气爆预处理后的产物进行同步糖化发酵,研究了不同的底物添加策略对同步糖化发酵的影响。结果表明,通过分批添加底物,能提高木糖利用率,乙醇产量接近理论转化率(包括木糖)的50%;仅利用固形物进行同步糖化发酵,通过改变固形物浓度能有效提高乙醇终浓度,最大可达到49.9 g/L,转化率最高可达82.7%。采用不同的底物添加能有效改善同步糖化发酵过程中对木糖的利用率、乙醇终浓度以及乙醇转化率。
Corn straw pretreated by gas explosion was used for SSF and the effects of different substrate-adding methods on SSF were investi- gated. The results suggested that batch addition of substrate could improve the utilization rate of xylose, and ethanol yield could reach 50 % of the theoretical conversion rate. As water insoluble solids （WIS） was used as the only feedstock for SSF, the final concentration of ethanol was effec- tively increased up to 49.9 g/L through the change of WIS concentration and the conversion rate was as high as 82.7 %. The use of different sub- strate-adding methods could effectively improve the utilization rate of xylose, the final concentration of ethanol, and ethanol conversion rate during SSF process.
出处
《酿酒科技》
北大核心
2012年第11期91-94,共4页
Liquor-Making Science & Technology
关键词
木质纤维素
燃料乙醇
同步糖化发酵
木糖
lignocellulose
fuel ethanol
simultaneous saccharification and fermentation（SSF）
xylose
