Continuous ethanol production and cell growth in an immobilized-cell bioreactor employing Zymomonas mobilis

Journal Article · Mon Mar 01 00:00:00 EST 1982 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260240306· OSTI ID:5122217

Arcuri, E J

Ethanol-producing bioreactors employing cells of Zymomonas attached to glass-fiber pads were operated continuously for as long as 28 days. Ethanol production, which is related to bed-associated biomass levels, was found to occur in three distinct phases: an exponential phase, a linear phase, and a ''steady-state'' phase. After prolonged operation, a bacterial floc developed in the reactor. The maximum effluent ethanol concentration and the maximum volumetric productivity were 6.4% and 152 g/L/h, respectively, and both were attained at a liquid residence time of from 10-15 minutes. Both maxima occurred after the development of the bacterial floc. The flocculant bacterium has been isolated and tentatively identified as a flocculant strain of Z. mobilis. (Refs. 17).

• Research Organization: Chemical Tech Div, Oak Ridge National Lab Oak Ridge, Tennessee 37830
• OSTI ID: 5122217
• Journal Information: Biotechnol. Bioeng.; (United States), Vol. 24:3
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
59 BASIC BIOLOGICAL SCIENCES
ETHANOL
PRODUCTION
ZYMOMONAS MOBILIS
IMMOBILIZED CELLS
CONTINUOUS CULTURE
FLOCCULATION
GROWTH
ALCOHOLS
BACTERIA
HYDROXY COMPOUNDS
MICROORGANISMS
ORGANIC COMPOUNDS
PRECIPITATION
SEPARATION PROCESSES
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