Rapid process for the conversion of xylose to ethanol

C - Chemistry – Metallurgy – 12 – P

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195/14, 195/9

C12P 7/06 (2006.01)

Patent

CA 1266245

TITLE RAPID PROCESS FOR THE CONVERSION OF XYLOSE TO ETHANOL INVENTORS Gode B. Calleja Sue Levy-Rick George Mahmourides John Labelle Henry Schneider ABSTRACT OF DISCLOSURE This invention concerns a method for producing ethanol from a D-xylose-containing substrate which comprises (a) culturing selected yeast cells for several generations aerobically in the presence of D-xylose to condition the cells to D-xylose as a major carbon source, subsequently harvesting such cells when they are in a physiological state where ethanol productivity is at or near a maximum and (b) inoculating a D-xylose-containing medium with cells conditioned to D-xylose-containing medium and allowing fermentation to proceed under conditions where the availability of oxygen is low. The conditioned cells can be recycled through step (b) many times.

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