INFLUENCE OF THE CONCENTRATIONS OF D-XYLOSE AND YEAST EXTRACT ON ETHANOL-PRODUCTION BY PACHYSOLEN-TANNOPHILUS

被引:17
作者
BRAVO, V
CAMACHO, F
SANCHEZ, S
CASTRO, E
机构
[1] UNIV JAEN,FAC CIENCIAS EXPTL,DEPT INGN QUIM,E-23071 JAEN,SPAIN
[2] UNIV GRANADA,FAC CIENCIAS,DEPT INGN QUIM,E-18071 GRANADA,SPAIN
来源
JOURNAL OF FERMENTATION AND BIOENGINEERING | 1995年 / 79卷 / 06期
关键词
ETHANOLIC FERMENTATION; D-XYLOSE; YEAST EXTRACT; PACHYSOLEN TANNOPHILUS;
D O I
10.1016/0922-338X(95)94749-H
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
To determine the most favorable conditions for the production of ethanol by Pachysolen tannophilus, this yeast was grown in batch cultures with various initial concentrations of two of the constituents of the culture medium: D-xylose (s(0)), ranging from 1 g . l(-1) to 200 g . l(-1), and yeast extract (l(0)), ranging from 0 g . l(-1) to 8 g . l(-1). The most favorable conditions proved to be initial concentrations of s(0)=25 g . l(-1) and l(o)=4 g . l(-1), which gave a maximum specific growth rate of 0.26 h(-1), biomass productivity of 0.023 g . l(-1) . h(-1), overall biomass yield of 0.094 g . g(-1), specific xylose-uptake Fate (q(s)) of 0.3 g . g(-1) . h(-1) (for t=50 h), specific ethanol-production rate (q(E)) of 0.065 g . g(-1) . h(-1) and overall ethanol yield of 0.34 g . g(-1); q(s) values decreased after the exponential growth phase while q(E) remained practically constant.
引用
收藏
页码:566 / 571
页数:6
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