Ethanol production by Zymomonas mobilis in fed-batch fermentations

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260260308· OSTI ID:6764403

Silman, R W

The production of ethanol by Zymomonas mobilis NRRLB-4286 was studied in fed-batch cultures. Initial percent (w/v) glucose, rate of feed, and quantity of 50% (w.v) glucoses feed were varied. Glucose inhibition of growth rate occurred at concentrations greater than 85 (w.v). Feed was begun after 4 h incubation. Feed volume was ca. 36% of starting batch volume to get ca. 10% (w/v) ethanol at harvest. The range of feed rates studied varied from 16% batch volume/h (glucose concentration increased to an inhibitory level) to 4% batch volume/h (glucose concentration dropped rapidly to zero and was limiting). Increasing feed volume to 46% of starting volume at the best feed rate (ca. 10% feed volume/h) increased final ethanol concentration to 11.3% (w/v). However, the resultant increase in fermentation time from ca. 21 to 29 h decreased ethanol volumetric productivity from 5.2 to 4.6 g/L h.

• Research Organization: Dept. of Agriculture, Peoria, IL
• OSTI ID: 6764403
• Journal Information: Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 26:3; ISSN BIBIA
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
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ALCOHOLS
ALDEHYDES
BACTERIA
BATCH CULTURE
BIOCHEMICAL REACTION KINETICS
BIOCONVERSION
BIOSYNTHESIS
CARBOHYDRATES
ETHANOL
FERMENTATION
GLUCOSE
HEXOSES
HYDROXY COMPOUNDS
KINETICS
MICROORGANISMS
MONOSACCHARIDES
ORGANIC COMPOUNDS
PRODUCTIVITY
REACTION KINETICS
SACCHARIDES
SYNTHESIS
ZYMOMONAS MOBILIS