电渗析法从谷氨酸发酵液中提取谷氨酸铵的研究  

Study on the separation of monoammonium L-glutamate from glutamic acid broth using electrodialysis

作　　者：艾社芳[1] 石绍渊[2] 王金梅[1] 张胜琴[1] 李春[1,3] 丛威[2] 

机构地区：[1]石河子大学化学化工学院/新疆兵团化工绿色过程重点实验室,新疆石河子832003 [2]中国科学院过程工程研究所,生化工程国家重点实验室,北京100080 [3]北京理工大学生命学院,北京100081

出　　处：《食品工业科技》2011年第1期195-197,200,共4页Science and Technology of Food Industry

基　　金：863重点项目(2006AA020301);973项目子课题(2007CB714306)资助

摘　　要：探讨了利用电渗析法从谷氨酸发酵液中直接分离提取谷氨酸铵。通过模拟谷氨酸发酵液对提取工艺进行了单因素优化实验,获得了如电流密度、料液与浓缩液体积比、循环流量等优化操作条件。采用优化条件对真实谷氨酸发酵液进行电渗析分离提取谷氨酸铵,当料室pH4.7左右可观察到结晶现象。通过补加氨水调节料室pH,可明显改善电渗析的整体效果,其中浓室谷氨酸浓度达到120g/L,回收率为78.8%。The feasibility of monoammonium L-glutamate separation directly from the glutamic acid broth using electrodialysis was investigated.The electrodialysis experiments have been performed with the simulated glumatic broth by the way of single factor test to optimize the operation conditions including current density,volume ratio of feed solution and concentrated solution and flow rate. Under the optimized conditions the monoammonium L- glutamate was separated directly from the glutamic acid broth and the crystallization phenomenon occurred at pH4.70 in the feed solution. The separation performance of electrodialysis was obviously improved by adding ammonia to adjust the pH of feed solution,the concentration of glutamate in the concentrated solution could attain to 120q/L and the recovery of monoammonium L-glutamate was 78.8%.

关 键 词：电渗析 谷氨酸铵 谷氨酸发酵液 氨水 

分 类 号：TS201.1[轻工技术与工程—食品科学]