活性スラッジ中の粘質物に関する研究 : (第2報)粘質物の粘性と活性スラッジの沈降性との関係

概要

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In order to examine the role of the mucilage in practical treatment, the correlation between viscosity of the mucilage and settling characteristics of activated sluge was studied. Results of the present investigation may be summaried as follows. : 1) The activated sludges with various sludge volume were prepared by varying temperature at treatment, adding nutrients in various concentrations, and adding various coagulants. Determinig the viscosity of mucilages extracted from the above sludges, the correlation was observed distinctly. 2) The same effect of pH on settling of the sludge as on viscosity of the mucilage was observed. i. e. The sludge volume was decreased with adjusting pH below 5. 3) Oweing to removal of the mucilage with alkali extraction, the settling of the bulked sludge was accelerated and delayed by addition of the mucilage.The above facts and the conditions for the mucilage production support the conclusion that bulking of activated sludge is caused by accumulation of the muculage in it.
社団法人日本生物工学会の論文
1968-06-25