Performance of tapered column packed-bed bioreactor for ethanol production

Journal Article · Thu Jan 01 04:00:00 EST 1987 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260290811· OSTI ID:6386799

Hamamci, H; Ryu, D D.Y.

A tapered column type of bioreactor system packed with immobilized Saccharomcyes cerevisiae was used to study the bioreactor performance as a function of design and operating variables. The performance of tapered column bioreactor system was found to be better than that of the conventional cylindrical column reactor system for the ethanol fermentation. The new bioreactor design alleviated problems associated with carbon dioxide evolution and provided a significantly better flow pattern for both liquid and gas phases in the bioreactor without local channelling. A mathematical simulation model, which takes into account the axial convection and dispersion, interphase mass transfer, and apparent kinetic design parameters, was developed. The effect of radial concentration gradients on the bioreactor performance was found to be insignificant. For the reactor system studied, the maximum ethanol productivity obtained was 60 g ethanol/L gel/h, and the maximum glucose assimilation rate was 140 g glucose/L gel/h. One of the most important findings from this study was the apparent kinetic parameters change at the glucose concentration of 2 g/L. This change was found to be due to the changes in yeast physiology and metabolism.

• Research Organization: Univ. of California, Davis
• OSTI ID: 6386799
• Journal Information: Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 29:8; ISSN BIBIA
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090222* -- Alcohol Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
ALCOHOLS
ALDEHYDES
BIOREACTORS
CARBOHYDRATES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
DESIGN
ETHANOL
FUNGI
GLUCOSE
HEXOSES
HYDROXY COMPOUNDS
IMMOBILIZED CELLS
MATHEMATICAL MODELS
MICROORGANISMS
MONOSACCHARIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PLANTS
SACCHARIDES
SACCHAROMYCES
SACCHAROMYCES CEREVISIAE
TESTING
YEASTS
YIELDS