纤维乙醇发酵工艺的比较及放大试验研究  

Study on Scale-up Experiment and Comparison of the Processes of the Cellulosic Ethanol Production

作　　者：常春[1] 赖智乐[1] 马晓建[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2011年第2期15-18,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：国家科技支撑计划资助项目(2007BAD66B04);河南省教育厅自然科学研究项目(2008B480004)

摘　　要：为了得到高效的纤维乙醇发酵方式,在酶解和发酵适宜的条件下,以汽爆玉米秸秆为原料对分步糖化发酵、同步糖化发酵、预酶解补料批式糖化发酵和变温同步糖化发酵生产乙醇的4种工艺进行了对比研究.试验表明:变温同步糖化发酵效率较高,其乙醇体积分数为4.98%,比同步糖化发酵提高了7.56%,比预酶解分批补料糖化发酵提高了12.60%,比分步糖化发酵提高了23.07%.在50 L发酵罐内进行了变温同步糖化发酵的放大实验,乙醇体积分数为4.26%;同时对放大实验中酵母浓度随时间的变化关系、残糖浓度随时间的变化关系和乙醇的体积分数随时间的变化关系进行了考察.Several processes of the SSF based on steam-exploded corn stalk were compared in this paper.The best process of the simultaneous saccharification and fermentation is in the condition of variable-temperature.In this condition the efficiency of the ethanol production improved by 7.56% compared with the simultaneous saccharification and fermentation,improved by 12.60% compared with the pre-hydrolysis of the fed-batch saccharification and fermentation,and improved by 23.07% compared with the score-step saccharification and fermentation.Besides the amplification of the variable-temperature simultaneous saccharification and fermentation test was studied in 50 L fermenter and the volume of ethanol is 4.26%.At the same time,the variations of the concentration of yeast,the concentration of residual sugar and the alcohol content with time in scale-up experiment were also studied.

关 键 词：同步糖化发酵 变温 放大实验 乙醇 

分 类 号：TQ352.78[化学工程]