活性汚泥から抽出した汚泥凝集物質 : 乳業廃水の処理に関する研究(第3報)

概要

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An artificially prepared wastewater was treated under the same loading conditions in two different test plants. An activated sludge with a low sludge volume index(ml/gMLSS) gave a pH 3 fraction (precipitated from the alkaline extract of activated sludge by reducing pH from 5.0 to 3.0) containing 5.9% of flocculants on a dry matter basis and a pH 5 fraction (similarly obtained by reducing pH from 7.0 to 5.0)containing 1.1%. On the other hand, an activated sludge with a high sludge volume index gave 10.5% of flocculants in the pH 3 fraction and 0.8% in the pH 5 fraction.Both fractions from each sludge were capable of flocculating kaolineite, though the flocculants from the low sludge volume index activated sludge had greater flocculating abilities than those of the high sludge volume index activated sludge.
社団法人日本生物工学会の論文
1981-03-25