Ethanol production by Zymomonas mobilis

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5705553

Strandberg, G W; Scott, C D; Donaldson, T L; Worden, R M

Research progress is described on the development of laboratory-scale columnar bioreactors utilizing the flocculent bacterium, X. mobilis, for ethanol production. X. mobilis forms stable, ball-like aggregates which maintain structural integrity even when subjected to the high shear forces generated in the active 3-phase fluidized-bed reactors. Cell retention and ethanol production were studied using 3 bioreactor configurations. Ethanol productivity appeared to be primarily affected by glucose feed concentration. In addition, it was found that in the absence of nutrients, the level of ethanol productivity can be maintained for at least 1 h before a severe drop occurred. Ethanol inhibition is considered to be a limiting factor in ethanol production. (DMC)

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5705553
• Report Number(s): CONF-8308107-1; ON: DE83017251
• Country of Publication: United States
• Language: English

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59 BASIC BIOLOGICAL SCIENCES
ALCOHOLS
ALDEHYDES
BACTERIA
BIOCONVERSION
BIOREACTORS
BIOSYNTHESIS
CARBOHYDRATES
DESIGN
ETHANOL
FERMENTATION
FLOCCULATION
FLUIDIZED BED REACTORS
FUEL DISPERSION REACTORS
GLUCOSE
GROWTH
HEXOSES
HOMOGENEOUS REACTORS
HYDROXY COMPOUNDS
MICROORGANISMS
MONOSACCHARIDES
ORGANIC COMPOUNDS
PERFORMANCE
PRECIPITATION
REACTORS
SACCHARIDES
SEPARATION PROCESSES
SYNTHESIS