中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 低pH值处理技术在树干毕赤酵母酒精连续发酵中的应用 安徽农业科学 2011,39 (4) 2196-2198
Position: Home > Articles > Ethanol Continuous Fermentation by Pichia stipitis with the Low-pH Value Treatment Journal of Anhui Agricultural Sciences 2011,39 (4) 2196-2198

低pH值处理技术在树干毕赤酵母酒精连续发酵中的应用

作  者：
季更生;刘玉华;勇强;余世袁
单  位：
江苏科技大学生物与环境工程学院;南京林业大学化学工程学院
关键词：
树干毕赤酵母;低pH值处理;连续发酵;酒精
摘  要：
[目的]解决连续发酵中杂菌污染的问题。[方法]树干毕赤酵母(Pichia stipitis)二级连续发酵戊糖己糖时采用低pH值处理技术来抑制杂菌。[结果]采用低pH值处理技术后,以15 g/L木糖和30 g/L葡萄糖混合物为发酵底物,发酵温度(35±1)℃,底物流加速度30 ml/h,二级连续发酵液中酒精平均浓度为15.22 g/L,还原糖利用为95.66%。该系统在连续发酵22 d的运行中从未发现染菌现象,发酵操作相当稳定。[结论]树干毕赤酵母对低pH值处理有良好的驯化适应性,pH值为2.40~3.60的处理条件对树干毕赤酵母完全可行。
译  名：
Ethanol Continuous Fermentation by Pichia stipitis with the Low-pH Value Treatment
作  者：
JI Geng-sheng et al(College of Biological and Environmental Engineering,Jiangsu University of Science and Technology,Zhenjiang,Jiangsu 212018)
关键词：
Pichia stipitis;Low-pH value treatment;Continuous fermentation;Ethanol
摘  要：
[Objective] The aim is to solve the problems in the process of the Pichia stipitis fermentation contaminated by other bacterium.[Method] The technique of low-pH value treatment in the continuous fermentation process of xylose/glucose through the Pichia stipitis was adopted in order to inhibit other bacterium.[Result] After low-pH value treatment,the mixture of the xylose of 15 g/L and the glucose of 30 g/L being taken as substitute,the fermentation temperature of(35±1)℃article studied the low-pH value treatment and the contaminating germ of continuous fermentation of xylose/glucose mixtures by P.stipitis.The adaptability of P.stipitis to low-pH value treatment was so strive that it was able to endure treatments at pH 2.40-3.60.Mixtures of 15.0 g/L xylose and 30.0 g/L glucose as substitute of lignocellulosic hydrolyzates,were used as main fermentation substrate.Tow-stage continuous cultures were carried out in a two-reactor system under condition of temperature of(35±1)℃ and a ventilated rate of 100-150 ml/min.The working volume of single reactor was 1.5 L.When the influent speed was at 30 ml/h or so,the average ethanol concentration in the effluent was 15.22 g/L,and the consumption ratio of substrate was 95.66%.The system was run steadily and no contamination was found during a 22-day′s operation.[Conclusion] The P.stipitis has good adaptability to low-pH value treatment and its fermentation could be continual under the pH value of 2.40-3.60.

相似文章

导出引用
计量
文章访问数: 14
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46