等电结晶谷氨酸溶解度及晶体沉降特性对提取收率的影响  

The Effect of Glutamate Solubility and Particle Sedimentation on Isoelectric Point Crystallization Extraction Rate

作　　者：刘乘龙[1] 张建华[1] 王正伟[1] 毛忠贵[1] 

机构地区：[1]江南大学生物工程学院,工业生物技术教育部重点实验室,江苏无锡214122

出　　处：《食品与发酵工业》2008年第11期6-9,共4页Food and Fermentation Industries

基　　金：国家863高新技术研究与发展计划项目(2006AA020303-02)

摘　　要：等电法提取谷氨酸工艺中,降低等电母液中谷氨酸浓度是提高提取收率的主要途径。文中研究了谷氨酸在等电母液中的溶解度及晶粒的沉降特性,结果表明,谷氨酸在等电母液中的溶解度平均比水中溶解度增加了0.30%～1.20%(质量浓度),而母液中因夹带谷氨酸微晶体而使得表观溶解度增加了0.46%～0.94%,因此,在不改变间歇等电法提取工艺前,减少或消除等电母液中夹带的微晶是提高提取收率的首选途径。Decreasing the L-glutamate concentration of isoelectric point crystallized mother liquid is the main way on glutamate isoelectric point precipitation method. Solubility of glutamate in isoelectric point crystallized mother liquid and particle sedimentation were researched in this paper. The experimental results show that solubility of glutamate in isoelectric point crystallized mother liquid increases by 0. 30%- 1.20% and solubility increases by 0. 46%-0. 94% for suspended particles. Reducing or eliminating suspended particles is the primary way to increase extraction rate in batch isoelectric point precipitation tank.

关 键 词：谷氨酸 等电结晶 晶体粒度分布 

分 类 号：TQ922.1[轻工技术与工程—发酵工程] TE622.11[石油与天然气工程—油气加工工程]