蔗渣水解液发酵乙醇的研究  

Research on Fermentation Hydrolyzate of Sugarcane Bagasse to Ethanol

作　　者：杨斌[1,2] 吕燕萍[1,2] 高孔荣 邓子新[1,2] 

机构地区：[1]华中农业大学生命科技学院 [2]华南理工大学食品工程系

出　　处：《生物工程学报》1997年第4期380-386,共7页Chinese Journal of Biotechnology

基　　金：广东省科学基金

摘　　要：研究了酵母（Ｐｉｃｈｉａｓｔｉｐｉｔｉｓ）Ｙ７１２４在限制供氧条件下尽管反应初期葡萄糖消耗速率大于木糖，但在一定时间后，葡萄糖的消耗速率变慢，而木糖消耗速率变快直至耗尽的现象。建立了气升柱以Ｐ．ｓｔｉｐｉｔｉｓ转化木糖为目的和以溢流柱Ｓａｃｈａｒｏｍｙｃｅｓｃｅｒｉｖｉｓｉａｅ转化残留葡萄糖为目的的串联发酵乙醇工艺，即流加５倍浓缩的蔗渣水解液，Ｄ＝０１ｈ－１，还原糖总利用率为９７２％，酒精浓度为４６５ｇ／Ｌ，生产率为４１ｇ／Ｌ·ｈ。During the research of glucose and xylose utilization by P.stipitis in limited oxygen supply condition.The rate that glucose was utilized by P.stipitis decreased rapidly while xylose decreased slowly until that time that glucose was shown to level out,then the rate of utilizatuion by P.stipitis of xylose increased rapidly.Based on the results,ethanol fermentation technology in continous connective tower fermentors was advanced,namely fermentation by P.stipitis in air lift loop tower focusing on xylose utilization and then residue glucose utilization by S.cerivisiae in overflow tower.When the fed hydrolyzate of bagasse was concentrated five folds and the dilution rate was0.1h -1 ,the total utilization ratio of reducing sugar was 97.2%;the concentration of ethanol was 46.5g/L the ethanol productivity was 4.1g/L·h.

关 键 词：发酵 乙醇 酵母 甘蔗渣 利用 

分 类 号：TS262.2[轻工技术与工程—发酵工程] TS249.2[轻工技术与工程—食品科学与工程]