The Role of Acetic Acid Degrading Bacteria in Self-Purification of Freshwater Streams

概要

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From the point of view that acetic acid degrading bacteria in bacterial flora is the key to purifying such waters as polluted rivers and sewage, this study was directed toward clarifying the role of this organism in self-purification of freshwater streams. The results of this study have shown that : 1. Several strains of acetic acid degrading bacteria were found to inhabit such waters as rivers, lakes, reservoirs, sea and sewage effluent, and these organisms could be enumerated in the presence of acetate and mineral salts. 2. These organisms played a vital role in the final stage of river self-purification process. 3. These organisms occupied about one sixth the total number of aerobic heterotrophic bacteria living in river waters, and the higher the extent of pollution, the larger the number of these organisms. 4. Most of these organisms isolated from the Dojima river were identified to be Pseudomonas arvilla, which is similar to Zoogloea ramigera. 5. In river self-purification, it became desirable that dissimilation of the organisms was equal or greater than assimilation, and the BOD value of the condition may be a new water criterion to support the normal self-purification capacity. The criterion was about 4.5mg/l BOD under natural conditions and about 40mg/l BOD under artificial laboratory conditions using a Petri dish.
公益社団法人日本生物工学会の論文
1967-06-25