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Alcoholic fermentation of cellulose hydrolysate byZymomonas mobilis

โœ Scribed by Soon Chul Park; Ali Kademi; Jacques C. Baratti

Book ID
104634273
Publisher
Springer Netherlands
Year
1993
Tongue
English
Weight
514 KB
Volume
15
Category
Article
ISSN
0141-5492

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โœฆ Synopsis

Growth and ethanol production by three strains of the bacterium Zymomonas mobilis were tested, at 40ยฐC, in a medium containing cellulose hydrolysate (hexose fraction) as carbon source. The thermotolerant mutant C107 exhibited the best growth compared to wild type ZM4 and to the osmotolerant mutant SBE 15. When cultivated in media supplemented with various nutrients, growth was only observed in presence of yeast extract (10 g/l) which acted both as a vitamin supplier and pH stabilizer. Using calcium pantothenate instead of yeast extract and sodium acetate to control pH resulted in growth inhibition by the high medium osmolality. Batch fermentation with pH control (KOH addition) showed good growth and ethanol production with the mineral medium.

๐Ÿ“œ SIMILAR VOLUMES

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โœ A. Kademi; J. Baratti ๐Ÿ“‚ Article ๐Ÿ“… 1996 ๐Ÿ› Springer Netherlands ๐ŸŒ English โš– 472 KB

Growth and ethanol production by three strains (MSN77, thermotolerant, SBE15, osmotolerant and wild type ZM4) of the bacterium Zymomonas mobilis were tested in a rich medium containing the hexose fraction from a cellulose hydrolysate (Aspen wood). The variations of yield and kinetic parameters with

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A cellulose hydrolysate from Aspen wood, containing mainly glucose, was fermented into ethanol by a thermotolerant strain MSN77 ofZymomonas mobilis. The effect of the hydrolysate concentration on fermentation parameters was investigated. Growth parameters (specific growth rate and biomass yield) wer

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โœ Lisa A. Kirk; Horst W. Doelle ๐Ÿ“‚ Article ๐Ÿ“… 1992 ๐Ÿ› Springer ๐ŸŒ English โš– 542 KB

The inclusion of specific salts in Zymomonas mobilis batch sucrose fermentations can limit by-product formation. Sorbitol and fructo-oligosaccharide formation can be reduced and ethanol production enhanced by manipulating mineral salt concentrations. Chloride salts reduced the production of biomass

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The influence of initial substrate concentration on fermentation kinetics of Zymomonas mobilis on glucose has been studied in batch cultures over the range 50-190 gl-1 glucose. With increasing glucose, parameters relative to growth (B and RGX) are more rapidly and more noticeably affected than those