汚濁河川水中の微生物群による有機物の嫌気的分解 : II 乳酸発酵と単離された乳酸生成菌の代謝

概要

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In the previous paper, the authors reported on the occurrence of organic acid fermentation coupled with sulfate reduction in the polluted river-water under anaerobic condition and explained the mechanism of the phenomenon on the basis of the assumption that the carbohydrates discharged into the river-water undergo successive metabolism of lactic acid fermentation and sulfate reduction with the ultimate production of acetate. To justify the above assumption, an experiment in which sulfate reduction was blocked by lowering the supply of sulfate and increasing that of carbohydrate was carried out, and as the result heterolactic acid fermentation was found where lactate and acetate were produced predominantly. Furthermore, two coliform bacteria, i. e. Escherichia coli and Aerobacter aerogenes were isolated as the heterolactic spccies from the culture. As the fermentation types of the single-species populations of these two bacteria were almost the same as that of the mixed-species population of the polluted river-water, it was suggested that the coliform bacteria might play a decisive role in the first step-breakdown of carbohydrates within the polluted river-water.
日本生態学会の論文
1964-02-01