三相流化床L-乳酸发酵及与离子交换分离耦合  

L-LACTIC ACID FERMENTATION AND COUPIED WITH ION-EX- CHANGE SEPARATION IN A THREE-PHASE FIUIDIZED-BED BIOREACTOR

作　　者：林建平[1] 周凡[1] 岑沛霖[1] 

机构地区：[1]浙江大学化工系,杭州310027

出　　处：《微生物学报》1996年第4期310-313,共4页Acta Microbiologica Sinica

基　　金：国家自然科学基金资助项目

摘　　要：L—乳酸因其能被人体代谢而将在食品、医药工业中代替DL—乳酸。另外均聚和共聚L—乳酸在医学及生产可生物降解的包装材料、农膜等方面有巨大的潜在市场。The L-lactic acid production with R. oryzae immobilized by calcium alginate entrapment method was studied. A three-phase fluidized-bed bioreactof was developed. Comparing to free-cell fermentation, high productivity (3-4g . L-1 . h-1) and yield (0.77-0.80g/g)was obtained. The simultaneous fermentation and ion-exchange separation was studied to overcome some shortages in the conventional fermentation process with CaCO3 as the neutralizer, and the process was proved feasible to product L-lactic acid efficiently.

关 键 词：乳酸 发酵 三相流化床 离子交换 分离耦合 

分 类 号：TQ921.3[轻工技术与工程—发酵工程]