Effect of Xonotlite on Activated Sludge Immobilization

概要

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Experimental investigations were carried out on the immobilization effect of activated sludge in case of supplying Xonotlite continuously to the aeration basin, which was calcium silicate hydrate.<BR>Initial diameters of activated sludge floc were about 30-100μm. But, the floc diameters of activated sludge were about 500-1000μm after 3 weeks, increasing gradually during the experimental period. It was shown obviously that Xonotlite was to act as the bridge-building material and to promote the binding immobilization of activated sludge from microscopic observation.<BR>The accumulated amount of Xonotlite in activated sludge was derived from the mass balance in aeration basin. It was suggested that set values of both sludge retention time and influent Xonotlite were very important, applying its formula to the experimental results.<BR>Moreover, it was considered that theoretical and experimental investigations on the influent inorganic matter affecting to activated sludge were significant problems in future.
日本水処理生物学会の論文