固定化Zymomonas mobilis酒精发酵的研究  

Studies on immobilization of Zymomonas mobilis for ethanol fermentation.

作　　者：楼建荣 郑晓冬[1] 何国庆[1] 吴金鹏[1] 

机构地区：[1]浙江农业大学食品科学与技术系

出　　处：《浙江农业大学学报》1994年第1期106-109,共4页

基　　金：浙江省科委资助项目

摘　　要：以Ｚｙｍｏｍｏｎａｓｍｏｂｉｌｉｓ作为酒精生产菌，用海藻酸钙包埋，制成直径为３ｍｍ左右的细胞固定化球，进行酒精发酵和发酵条件试验，研究表明，固定化细胞和游离细胞酒精发酵条件基本一致，最适温度为３０℃，最适ｐＨ为５～６．溶解氧对该茵酒精发酵有抑制作用，在固定化细胞多批次半连续发酵试验中，在６小时内其乙醇产率系数达到０．４９左右。In this experiment Zymomonas mobilis was used as the ethanol producer.The ethanol Was produced by Z,molelis cells that had been capsulated with Ca- alginate gel in a shape of immo- bilized bead about 3.0 mm in diameter each. The experiment results showed that:The ethanol fer- mentation conditions for immobilized cells were similar to that of free cells,the optimum tempera- ture and pH range were 30℃ and 5.0～6.0.The dissilvpd oxygen concentration had conslderable effects on the ethanol production; the ethanol yield coefficient(Y_(p/s))could reach 0.49 within less than 6 hours in the batch fermentation。

关 键 词：固定化细胞 酒精 发酵 

分 类 号：TS262.2[轻工技术与工程—发酵工程]