Ethanol production by Zymomonas mobilis and its application on an industrial scale
A continuous culture of Zymomonas mobilis produced 60 g/l ethanol over a test period of 39 days. In the presence of oxygen and at ethanol concentrations exceeding 64 g/l, the substrate conversion was incomplete due to growth inhibition. The Zymomonas fermentation was used for ethanol production from an industrial, enzymatically hydrolyzed wheat starch fraction. Continuous cultures converted this substrate with productivities of up to 4.5 g/l.h at ethanol concentrations of 56-60 g/l. The fermentation of glucose derived from wheat starch has been scaled up to 50 cubic m in an industrial plant. Continuous operation has been possible up to 20 days. Disturbances to the process may be mainly due to the presence of lactic acid bacteria in the substrate feed.
- Research Organization:
- Institute fuer Biotechnologie der Kernforschungsanlage, Juelich, Germany, F.R.; Pfeifer and Langen, Dormagen, Germany, F.R.
- OSTI ID:
- 6451535
- Report Number(s):
- CONF-840509-
- Journal Information:
- Biotechnol. Bioeng. Symp.; (United States), Vol. 16:14; Conference: 6. symposium on biotechnology for fuels and chemicals, Gatlinburg, TN, USA, 15 May 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
59 BASIC BIOLOGICAL SCIENCES
ETHANOL
BIOSYNTHESIS
STARCH
ENZYMATIC HYDROLYSIS
FERMENTATION
ZYMOMONAS MOBILIS
CONTINUOUS CULTURE
GLUCOSE
GROWTH
INHIBITION
PRODUCTIVITY
SUBSTRATES
ALCOHOLS
ALDEHYDES
BACTERIA
BIOCONVERSION
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
HEXOSES
HYDROLYSIS
HYDROXY COMPOUNDS
LYSIS
MICROORGANISMS
MONOSACCHARIDES
ORGANIC COMPOUNDS
POLYSACCHARIDES
REAGENTS
SACCHARIDES
SOLVOLYSIS
SYNTHESIS
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