Method for producing ethanol in high concentration by using...

Details Method for producing ethanol in high concentration by using... Method for producing ethanol in high concentration by using...

C - Chemistry, Metallurgy

12

P

195/2

C12P 7/06 (2006.01) C12M 1/40 (2006.01)

Patent

CA 1143307

Abstract of the Disclosure The specification discloses a method for producing ethanol in a high concentration, e.g. 200 mg/ml, by using an immobilized microorganism which comprises the steps of contacting the immobilized cells of a microorganism of the genera of Saccharomyces or Zymomonas with a culture broth containing a fermentative sugar and other nutrients necessary for the growth of the microorganism; microbiologically converting the sugar into ethanol; adding an additional fresh culture broth containing the sugar to the conversion reaction system; if required, intermittently or continuously repeating the addition of a broth containing the sugar; and then separating the broth containing ethanol produced. This method avoids the disad- vantage of prior art processes, such as low concentrations of ethanol and immobilization of the microorganism by high concentrations of the fermentative sugar.

353890

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