BATCH FERMENTATION KINETICS OF SUGAR-BEET MOLASSES BY ZYMOMONAS-MOBILIS

被引:27
作者
PARK, SC [1 ]
BARATTI, J [1 ]
机构
[1] UNIV PROVENCE, CNRS, CHIM BACTERIENNE LAB, BP71, F-13277 MARSEILLE 9, FRANCE
关键词
ZYMOMONAS-MOBILIS; MOLASSES; FERMENTATION; ETHANOL; OSMOLALITY; ETHANOL-PRODUCTION; GLUCOSE; STRAINS; ACID;
D O I
10.1002/bit.260380312
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
A new osmotolerant mutant strain of Zymomonas mobilis was successfully used for ethanol production from beet molasses. Addition of magnesium sulfate to hydrolyzed molasses allowed repeated growth without the need of yeast extract addition. The kinetics and yields parameters of fermentation on media with different molasses concentrations were calculated. The anabolic parameters (specific growth rate, mu, and biomass yields, Y(x/s)) were inhibited at elevated molasses concentrations while the catabolic parameters (specific ethanol productivity, q(p), and ethanol yield, Y(p/s)) were not significantly affected. In addition to ethanol and substrate inhibition, osmotic pressure effects can explain the observed results.
引用
收藏
页码:304 / 313
页数:10
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