活性汚泥中のメタン醗酵助成因子のアルコール醗酵促進効果

概要

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In a previous paper dealing with the isolation of stimulatory substances for methane fermentation contained in dried activated sludge, it was shown that Fraction G involving unknown brownish colored substances and some purine derivatives was most effective. The present paper describes the effect of the fraction and its components obtained in the course of further purification on the alcoholic fermentation using Saccharomyces sake as a test organism. The G-Fraction, without a further fractionation, was effective in alcoholic fermentation as in methane fermentation. Fraction K, derived from Fraction G by succesive purifications, also exhibited a similar effect to that of Fraction G. It had two characteristic peaks at 240 and 260 mμ. These two fractions enhanced the growth activity as well as fermentation ability under unappropriate circumstances such as in a medium containing a high concentration of glucose or alcohol. Adenine and hypoxanthine, which were contained in Fraction G and effective on methane formation, did not show an obvious effect on alcoholic formation under the experimental conditions.
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