自絮凝颗粒酵母发酵菊芋汁生产乙醇

被引：6

作者：

常宝磊

袁文杰

赵心清

任剑刚

白凤武

机构：

[1] 大连理工大学生物科学与工程系

来源：

过程工程学报 | 2009年 / 9卷 / 04期

关键词：

菊芋汁; 自絮凝颗粒酒酵母; 乙醇发酵;

D O I：

暂无

中图分类号：

TQ223.122 [];

学科分类号：

0817 ;

摘要：

分别采用分批和连续发酵方式,对自絮凝颗粒酵母Saccharomyces cerevisiae flo发酵菊芋汁生产乙醇的条件进行了优化.与先酶解菊芋汁后再用自絮凝酵母发酵的分步糖化发酵相比,分批发酵过程中同时加入菊粉酶和自絮凝酵母的同步糖化发酵乙醇得率高,发酵时间短.当菊芋汁总糖浓度分别为105和179g/L时,同步糖化发酵的最高乙醇浓度达50和82.5g/L,比分步糖化发酵高6.4%和13.8%.在连续发酵过程中应用同步糖化发酵法,当稀释率为0.02h-1时,乙醇浓度约为90g/L时达到稳定状态,乙醇得率达到理论值的90%,生产强度达2.12g/(L-h).

引用

页码：796 / 800

页数：5

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