Filtration of sewage sludge

Details Filtration of sewage sludge Filtration of sewage sludge

C - Chemistry, Metallurgy

02

F

362/48

C02F 11/14 (2006.01) B01D 37/03 (2006.01)

Patent

CA 1192321

ABSTRACT FILTRATION OF ORGANIC SUSPENSIONS An organic suspension, such as sewage sludge, is conditioned by adding a conditioner and then filter- ing the suspension through a filter element to form a filter cake on the element. Improved dryness proper- ties of the cake are obtained by using as conditioner during the formation of at least the first half (by weight solids), but not all, of the cake a high molecular weight polyelectrolyte conditioner and by using as conditioner during the formation of the remain- der of the cake an inorganic conditioner or a low molecular weight polyelectrolyte conditioner.

421349

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