Fluidized-bed bioreactors using a flocculating strain of Zymomonas mobilis for ethanol production

Journal Article · Sun Jan 01 04:00:00 EST 1984 · Ann. N.Y. Acad. Sci.; (United States)

OSTI ID:6317938

Scott, C D

A recently isolated strain of Zymomonas mobilis (NRRL B-12526) has been shown to form stable floc particles that can effectively convert glucose to ethanol at rates in excess of 400 g/l/hr in a fluidized-bed bioreactor. Preliminary results indicate that such a system, yielding particles which are in the size range of 0.5 to 1mm, may have extremely high productivity, even higher than Saccharomyces cerevisiae. However, the system is so reactive that the CO/sub 2/ off-gas makes it difficult to maintain a high biomass loading in the upper part of the reactor. This lower biomass content results in a decreased ethanol productivity, which approaches 100 g/l/hr for the entire active reactor volume when over 95% of the glucose is metabolized.

• Research Organization: Oak Ridge National Lab., TN
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6317938
• Journal Information: Ann. N.Y. Acad. Sci.; (United States), Journal Name: Ann. N.Y. Acad. Sci.; (United States); ISSN ANYAA
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090222* -- Alcohol Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
ALCOHOLS
ALDEHYDES
BACTERIA
BIOCONVERSION
BIOMASS
BIOREACTORS
BIOSYNTHESIS
CARBOHYDRATES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
ENERGY SOURCES
ETHANOL
FERMENTATION
FLUIDIZED BED REACTORS
FUEL DISPERSION REACTORS
GLUCOSE
GROWTH
HEXOSES
HOMOGENEOUS REACTORS
HYDROXY COMPOUNDS
METABOLISM
MICROORGANISMS
MONOSACCHARIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
REACTORS
RENEWABLE ENERGY SOURCES
SACCHARIDES
SIZE
SYNTHESIS