Continuous process for ethanol production by bacterial...

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

C - Chemistry, Metallurgy

12

P

195/10

C12P 7/06 (2006.01) C12M 1/36 (2006.01)

Patent

CA 1265078

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 qs and qp at any given value of D and Sr. 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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