活性汚泥の糸状細菌に及ぼす硝化の影響

概要

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The relationship between nitrification activity and filamentous growth of activated sludge was studied using various artificial wastewaters on a laboratory scale by both continuous and batch reactors. The wastewaters, not only with a high C/N ratio but also with a low C/N ratio, had a tendency to produce filamentous bulking when the nitrification was not active. The extent of nitrification was evaluated in terms of (oxidized nitrogen)^2/(total inorganic nitrogen); when this was above 20 mg/l the filamentous growth was suppressed. According to Eikelboom's method the filamentous microorganisms were mainly Sphaerotilus natans and Type 1701. Type 0961 was found only when wastewater containing much peptone was treated. The effects of nitrification on the filamentous growth in the batch runs were similar to those in the continuous runs. The measurements of oxidation reduction potential were correlated to the extent of nitrification of mixed liquor.
社団法人日本生物工学会の論文
1985-11-25