Ethanol fermentation by ionically adsorbed Zymomonas mobilis: environmental effects on cell immobilization
Batch ethanol fermentation by cells of Zymomonas mobilis ATCC 29191, ionically adsorbed on a DEAE-cellulose ion exchanger, was investigated in a stirred fermentor. Adsorption isotherms in different media were determined and used to interpret the effects of the environment on cell immobilization. Other factors affecting cell immobilization during an actual fermentation were studied. Mechanical agitation was found to cause detachment of cells from the ion exchange particles. The results suggest that the amount of cells adsorbed during a fermentation process is different from that found from adsorption isotherm data. Consequently, application of equilibrium adsorption data to actual fermentations should be done with caution.
- Research Organization:
- Univ. of Virginia, Charlottesville
- OSTI ID:
- 6526964
- Journal Information:
- Biotechnol. Bioeng.; (United States), Vol. 29:9
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CELLULOSE
FERMENTATION
ETHANOL
YIELDS
ZYMOMONAS MOBILIS
IMMOBILIZED CELLS
ADSORPTION ISOTHERMS
BATCH CULTURE
ION EXCHANGE
ALCOHOLS
BACTERIA
BIOCONVERSION
CARBOHYDRATES
HYDROXY COMPOUNDS
ISOTHERMS
MICROORGANISMS
ORGANIC COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
090222* - Alcohol Fuels- Preparation from Wastes or Biomass- (1976-1989)