Dewatering of sludges

Details Dewatering of sludges Dewatering of sludges

C - Chemistry, Metallurgy

02

F

204/99.09

C02F 11/12 (2006.01) B01D 35/06 (2006.01) B01D 57/02 (2006.01) B01D 61/56 (2006.01)

Patent

CA 2229642

Dewatering of an aqueous sludge such as a sewage sludge is effected by mixing fibrous material (such as shredded cellulosic material) into the sludge and simultaneously applying (a) vacuum or pressure to the mixture when supported on a filter and (b) an electric field to cause liquid to be drawn through the filter.

L'invention porte sur un procédé de déshydratation de boues aqueuses telles que des boues d'épuration. Ce procédé consiste à mélanger un matériau fibreux (par exemple un matériau cellulosique broyé) aux boues tout en les soumettant (a) à une pression ou à une dépression alors qu'elles se trouvent sur un filtre, puis (b) à un champ électrique entraînant le liquide à travers le filtre.

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