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Sludge dewatering

Sludge activated treatment: belt press

Introduction to sludge dewatering

Dewatering processes provide a concentrated, consolidated product − retaining most of the solids from the original sludge – along with a diluted stream which is predominantly water.

Dewatering processes apply a significant mechanical force to achieve increased water removal over that possible from thickening.

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Fig. 4.  SP filtrate and acidified sludge samples

Phosphorus recovery by sludge acidification and dewatering

A pilot-scale Danish study of phosphorus extraction from acidified anaerobic and aerobic sludge samples has revealed removal to be more effective from anaerobic sludges, even though the digested sludge alkalinity increases the total acid demand.

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