On-line extraction of ethanol from fermentation broths using hydrophobic adsorbents
The effect of removing ethanol during fermentation on the batch kinetics of glucose utilization by the yeast Saccharomyces cerevisiae was examined using several hydrophobic adsorbents. The addition of the molecular sieve, silicalite, to fermentation broths greatly reduced the concentration of ethanol present, but did not increase the glucose utilization rate to the extent predicted by product-inhibition kinetic models obtained from adsorbent-free continuous culture experiments. Addition of two polymeric adsorbents (XAD-4 and XAD-7) greatly inhibited cell growth. This was due to nutrient and cell adsorption by the resin. Adsorption systems were compared to other on-line schemes (vacuferm, solvent extraction) and it was concluded that all of these currently proposed systems would not appear to confer any added advantage if integrated into a high biomass concentration fermenter system. 19 references, 7 figures, 1 table.
- Research Organization:
- Univ. of Waterloo, Ontario
- OSTI ID:
- 6925504
- Report Number(s):
- CONF-830567-
- Journal Information:
- Biotechnol. Bioeng. Symp.; (United States), Vol. 13; Conference: 5. symposium on biotechnology for fuels and chemicals, Gatlinburg, TN, USA, 10 May 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ADSORBENTS
COMPARATIVE EVALUATIONS
ETHANOL
MATERIALS RECOVERY
ADSORPTION ISOTHERMS
BATCH CULTURE
BIOCHEMICAL REACTION KINETICS
COST
CULTURE MEDIA
FERMENTATION
GAS CHROMATOGRAPHY
GLUCOSE
INHIBITION
MOLECULAR SIEVES
ON-LINE CONTROL SYSTEMS
RESINS
SACCHAROMYCES CEREVISIAE
SEPARATION PROCESSES
ALCOHOLS
ALDEHYDES
BIOCONVERSION
CARBOHYDRATES
CHROMATOGRAPHY
CONTROL SYSTEMS
FUNGI
HEXOSES
HYDROXY COMPOUNDS
ISOTHERM
KINETICS
MANAGEMENT
MICROORGANISMS
MONOSACCHARIDES
ON-LINE SYSTEMS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLANTS
POLYMERS
PROCESSING
REACTION KINETICS
RECOVERY
SACCHARIDES
SACCHAROMYCES
WASTE MANAGEMENT
WASTE PROCESSING
YEASTS
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