Ethanol production by high performance bacterial fermentation

Details Ethanol production by high performance bacterial fermentation Ethanol production by high performance bacterial fermentation

1987-10-13

1989-05-16

Penland, R. B.

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

Preparing oxygen-containing organic compound

435813, C12P 714

Patent

active

048309648

ABSTRACT:
The present invention is directed to the preparation of ethanol by bacterial fermentation. It makes use of a microorganism capable of producing ethanol and the process is carried out in two stages. In the first stage a bacterial cell suspension is produced together with ethanol in an ethanol concentration range that does not substantially inhibit production of the bacterial cells in a medium containing a source of nitrogen and a source of carbon. Ethanol is then produced in the absence of substantial bacterial cell production by the addition of fermentable sugar to the bacterial cell suspension which is produced in the first stage. The preferred microorganism is a member of the genus Zymomonas.

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Rogers et al., "High Productivity Ethanol Fermentation with Zymomonas Mobilis", Process Biochemistry Aug.-Sep. (1980), pp. 9-11.
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Belaich et al., "Uncoupling in Bacterial Growth: Effect of Pantothenate Starvation on Growth of Zymomonas Mobilis", J. Gen. Microbiol. 70(1972), pp. 179-185.
Rogers et al., "Kinectics of Alcohol Production by Zymomonas Mobilis at High Sugar Concentrations", Chem. Abst., vol. 91(1979), Abstract No. 3905p.

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