Treating sewage or like sludge

Details Treating sewage or like sludge Treating sewage or like sludge

C - Chemistry, Metallurgy

02

F

C02F 11/14 (2006.01) C02F 11/18 (2006.01)

Patent

CA 2402728

There is disclosed a process for treating sewage sludge or similar organic sludge in which dewatered sludge cake and an alkaline admixture are mixed and then dried under pasteurisation conditions utilising heat from the exothermic reaction with the alkali, in which drying is effected by extraction of moisture evaporated from the mixture by the exothermic heat.

L'invention concerne un procédé de traitement des boues résiduaires ou boues organiques similaires, consistant à mélanger un gâteau de boue essorée et un produit d'addition alcalin puis à sécher ce mélange dans des conditions de pasteurisation en utilisant la chaleur de la réaction exothermique avec l'alcali. Le séchage s'effectue par extraction de l'humidité qui s'évapore du mélange via la chaleur exothermique.

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