固定化微生物によるエタノールの連続発酵

概要

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Technology for a continuous ethanol fermentation process was developed by means of immobilized living cells using yeast cells and specially designed artificial resins.<BR>Yeast which has the ability to produce ethanol was screened from <I>Saccharomyces</I> genus and mixed with prepolymers of photocrosslinkable resin, then illuminated with an active ray (for example, chemical lamp) to change the prepolymers into three dimensional cross-linked polymers in which yeast was entrapped. Immobilized yeast processed into appropriate thinner sheet was packed in a fermentor and a diluted molasses solution fed to the fermentor. The fermentation temperature was kept at about 30-32°C and the pH at 4-5.<BR>As a result of a bench scale test (10 litres of ethanol a day) and pilot plant test (250 litres of ethanol a day), the constant activity of the yeast and high ethanol yield on sugar during long-term operation was confirmed and it was also established that the ethanol productivity was several times that of conventional suspended state batch system fermentation.
社団法人有機合成化学協会の論文