Ethanol production in a continuous process with cell recycle

Details Ethanol production in a continuous process with cell recycle Ethanol production in a continuous process with cell recycle

1981-03-03

1984-04-17

Penland, R. B.

Chemistry: molecular biology and microbiology

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

Preparing oxygen-containing organic compound

435801, 435813, 435822, C12P 714

Patent

active

044435444

ABSTRACT:
An improved method for the production of ethanol from a fermentable carbohydrates such as glucose, fructose or sucrose using the bacterium Zymomonas mobilis which method involves continuously culturing the bacterium in a culture medium containing the fermentable carbohydrate, continuously drawing off a portion of the culture medium and replacing that portion with fresh culture medium, separating from the removed portion of the culture medium cells of Zymomonas mobilis contained therein and returning those cells to the culture medium and recovering the ethanol contained in the portion of the culture medium from which the cells have been removed.
It has been found that this method results in greatly improved ethanol production without the disadvantages which have been found when yeasts are continuously cultured.

REFERENCES:
Rogers et al., "Kinetics of Alcohol Production by Zymomonas mobilis at High Sugar Concentrations", Chemical Abstracts, vol. 91 (1979), Abstract No. 3905p.
Lee et al., "Ethanol Production by Zymomonas mobilis in Continuous Culture at High Glucose Concentrations", Chemical Abstracts, vol. 92 (1980), Abstract No. 4686a.

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