Process of dewatering sewage sludge

Details Process of dewatering sewage sludge Process of dewatering sewage sludge

C - Chemistry, Metallurgy

02

F

362/2

C02F 11/12 (2006.01)

Patent

CA 1073564

INVENTION OF: NORWOOD K. TALBERT FOR: PROCESS OF DEWATERING SEWAGE SLUDGE, ABSTRACT OF THE DISCLOSURE . Sludge from a municipal or industrial sewage treatment facility is mixed with a mineral acid or anhydride thereof to release the entrapped water in the sludge. The resulting mixture of said solids and diluted acid or anhydride is then mixed with a basic material, such as ammonia, the heat generated by reaction of the base and acid evaporates the water to form either a completely dry mixture of sludge solids and a salt, or a mixture having a predetermined moisture content which may be air dried. In some applications it is preferable to recycle a portion of the end product by adding it to the reaction vessel.

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