Continuous process for ethanol production by bacterial fermentat

Details Continuous process for ethanol production by bacterial fermentat Continuous process for ethanol production by bacterial fermentat

1985-05-20

1989-03-14

Warren, Charles F.

Chemistry: molecular biology and microbiology

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

Preparing oxygen-containing organic compound

435244, 435813, C12P 706, C12N 120, C12N 138

Patent

active

048124109

ABSTRACT:
A continuous process for the production of ethanol by fermentation with strains of Zymomonas is provided. Metabolic processes are limited by the nutrients nitrogen, potassium and phosphorus. When growth is limited by one of these nutrients, the biomass expresses its maximum value for both q.sub.s and q.sub.p at any given value of D and S.sub.r. The process is conducted at a lower biomass concentration and a higher specific rate of ethanol formation than a similar process conducted with a nutrient medium that is not limited in nitrogen, potassium or phosphorus. A method of improving performance of Zymomonas in continuous ethanol fermentation at increased temperatures is also provided.

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