Ethanol production by Zymomonas mobilis in fed-batch fermentations

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

OSTI ID:6897956

Silman, R W

The production of ethanol by Zymomonas mobilis NRRL B-4286 was studied in fed-batch cultures. Initial percent (w/v) glucose, rate of feed, and quantity of 50% (w/v) glucose feed were varied. Glucose inhibition of growth rate occurred at concentrations greater than 8% (w/v). Feed was begun after 4 hours 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 5.2-4.6 g/L h. (Refs. 9).

• Research Organization: Northern Regional Research Center, Agricultural Research Service, US Dept of Agriculture, Peoria, IL 61604
• OSTI ID: 6897956
• 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
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
ALCOHOLS
ALDEHYDES
BACTERIA
BIOCONVERSION
CARBOHYDRATES
ETHANOL
FERMENTATION
GLUCOSE
GROWTH
HEXOSES
HYDROXY COMPOUNDS
INHIBITION
LOADING RATE
MICROORGANISMS
MONOSACCHARIDES
OPTIMIZATION
ORGANIC COMPOUNDS
PRODUCTION
SACCHARIDES
SEMIBATCH CULTURE
ZYMOMONAS MOBILIS