PRODUCTION OF ETHANOL BY THE THERMOTOLERANT YEAST KLUYVEROMYCES-MARXIANUS IMB3 DURING GROWTH ON LACTOSE-CONTAINING MEDIA

被引:33
作者
BRADY, D
MARCHANT, R
MCHALE, L
MCHALE, AP
机构
[1] Biotechnology Research Group, School of Applied Biological and Chemical Sciences, University of Ulster, Coleraine, BT52 1SA, Londonderry
关键词
D O I
10.1007/BF00136482
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The thermotolerant yeast strain, Kluyveromyces marxianus IMB3 was shown to be capable of growth and ethanol production on lactose containing media at 45 degrees C. On media containing 4% (w/v) lactose, ethanol production increased to 6.0g/l within 50h and this represented 29% of theoretical yield. During growth on lactose containing media the organism was shown to produce a cell-associated beta-galactosidase and no significant enzyme could be detected in the extracellular culture filtrate. Addition of beta-galactosidase, released from Kluyveromyces marxianus IMB3 cells, to active fermentations, resulted in increasing ethanol production to 53% of theoretical yield at 45 degrees C.
引用
收藏
页码:737 / 740
页数:4
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