硅橡胶膜生物反应器乙醇连续发酵传质动力学实验研究  

Mass Transfer Kinetics of Pervaporation in A MBR with Composite Silicone Rubber Membrane for Continuous Ethanol Fermentation

作　　者：钟月华[1] 肖泽仪[1] 黄卫星[1] 伍勇[1] 

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2003年第3期49-53,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(20276030)

摘　　要：利用新型的硅橡胶平板复合膜构造乙醇连续发酵膜生物反应器,研究了连续发酵-渗透蒸发操作稳态过程的膜传质动力学问题,实验分析了发酵液循环流量、发酵温度、膜表面液体流动模式对膜性能的影响。在长达500h的连续发酵过程中,膜的分离性能维持相对稳定,没有出现膜污染现象。硅橡胶膜对发酵液中的乙醇的原位分离有效地减轻了代谢产物对细胞抑制作用,在发酵过程的前后阶段,膜的总传质系数从5.21×10-7m/s提高到7.94×10-7m/s。膜对实际发酵液的分离性能表现比对乙醇-水模型溶液的高。In a membrane bioreactor with a novel plate composite silicone rubber membrane for the continuous fermentation for ethanol production, mass transfer kinetics of pervaporation through membrane was studied.The effects of flow rate of fermentation broth, fermentation temperature and the hydraulic configuration of membrane module were studied. In a continuous fermentation lasting 500 h, the membrane had been behaving well without fouling. The overall mass transfer coefficient was increased from 5.21×10 -7 m/s during the beginning 300 h to 7.94×10 -7 m/s during the subsequent 200 h. The long term continuous fermentation was achieved owing to the effective removal of inhibitory product by the membrane. It was shown that the membrane had superior separation performance with the real fermentation broth to with the aqueous solution of ethanol.

关 键 词：硅橡胶膜 生物反应器 乙醇连续发酵 渗透蒸发 膜传质 

分 类 号：TQ028[化学工程]