Ethanol production by high performance bacterial fermentation

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

C - Chemistry, Metallurgy

12

P

195/2

C12P 7/06 (2006.01)

Patent

CA 1186644

Inventor: Hugh Gibson Lawford ETHANOL PRODUCTION BY HIGH PERFORMANCE BACTERIAL FERMENTATION ABSTRACT The present invention is directed to the preparation of ethanol by bacterial fermentation. It makes use of a micro- organism capable of producing ethanol and the process is car- ried out in two stages. In the first stage a bacterial cell suspension is produced together with ethanol in an ethanol con- centration range that does not substantially inhibit produc- tion 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 sus- pension which is produced in the first stage. The preferred microorganism is a member of the genus Zymomonas.

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