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石贵阳[1,2] 马文超[1] 张梁[1] 章克昌[1,2][1]江南大学生物工程学院生物资源研究室,江苏无锡214036
[2]江南大学工业生物技术教育部重点实验室,江苏无锡214036摘 要:对玉米粉悬浮液沉降情况的研究表明，沉降界面初始沉降速度随初始浓度的增加而减小。对外环流式发酵罐用于玉米生料酒精发酵进行研究，结果表明，起始阶段，玉米粉悬浮液要在外环流式发酵罐中完成强制回流循环，必然存在一个最小回流量Q；通过恒流泵强制发酵醪循环可以显著缓解原料沉淀造成的不利影响。有利于发酵罐中的传质；发酵20h，强制循环发酵液中酵母细胞出芽率较自然发酵提高84．8％，死亡率降低100％。发酵70h时酒精度提高11．5％；采用外环流式发酵罐进行玉米生料发酵酒精时，较大的高径比对发酵有利。[著者文摘]
关键词:玉米生料 酒精发酵 强制循环 外环流式发酵罐
分类号: TS262.2[著者标引]文献标识码：A文章编号：1671-9387（2005）11-0073-05栏目信息：食品科学
相关文献:主题相关
Study on alcoholic fermentation with uncooked corn flour
in external circumfluent fermentorSHI Gui-yang, MA Wen-chao,
ZHANG Liang, ZHANG Ke-chang1.Lab of Biomass Resources,School
of Biotechnology;2. The Key Laboratory of Industry Biotechnology,
Ministry of Education,Wuxi,Jiangsu 214036,ChinaAbstract:In
the alcoholic fermentation with external circumfluent fermentor,the
sediment of raw corn flour was studied. The results indicated
that the initial settling velocity decreased with the increase
of initial concentration. It also proved that a smallest
circulation flux existed for corn flour suspension to fulfill
compulsory circulation. Compulsory circulating fermentation
promoted the process of transferring mass, the multiplication
rate of the yeast cell was increased by 84.8% ,the death
rate of that was decreased by 100% after 20 hours＇ fermentation,and
the ethanol concentration at 70 h was increased by 11.5%
compared with none circulating fermentation. Additionally,the
fermentor with the bigger ratio of height to diameter contributed
to alcoholic fermentation with uncooked corn flour.[著者文摘]
Key words:uncooked corn flour; alcoholic fermentation ;
compulsory circulation ; external circumfluent fermentor
收稿日期: 2005-07-01修订日期: 基金资助:国家科技部“十五”攻关项目（2001BA501A01）
作者简介:石贵阳（1963-），男，浙江新售人，副教授，博士，硕士生导师，主要从事再生资源生物转化工程及酶技术研究。E-mail：gyshi@sytu.edu.cn |
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