Ethanol Production from Molasses using Cell Recycling of Saccharomyces cerevisiae

概要

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Plysiological studies of five strains (Sc6,JIL, R1,G, and HSR) of Saccharomyces cerevisiae capable of undergoing more than 5 cycles of fermentation, using cell recycling technique, were done for further maximising ethanol production. The potential of different strains in terms of ethanol production showed that strains JIL, HSR, G, and Sc6 could tolerate up to 10% ethanol and R1 up to 9% only. An initial sugar concentration of 18% (w/v) and a fermentation tempereture of 30℃ were found potimum for fermentation. Addition of urea increased the fermentation rate significantly in all the strains except JIL. A concentration of 0.1% in JIL, 0.2% in R1 and HSR and 0.3% urea (based on fermentable sugars) in Sc6 and G gave maximum fermentation efficiency. Urea at its optimum concentration increased ethanol yield by 1.84 to 4.84% over control and reduced the time to ferment the same amount of sugar by 3.22 to 26.5% in all the strains except JIL, thereby further increasing the ethanol productioin by 1.84 tto 40.4% in the fermentation time saved.
公益社団法人日本生物工学会の論文
1984-10-25