Sludge dewatering process

Details Sludge dewatering process Sludge dewatering process

C - Chemistry, Metallurgy

02

F

362/2

C02F 11/12 (2006.01)

Patent

CA 1070864

SLUDGE DEWATERING PROCESS ABSTRACT OF THE DISCLOSURE Sewage sludges of the waste-activated, raw and digested types are dewatered for yielding a product having a sufficiently high heat value to support autogenous combustion. The process in- cludes the addition of a polymeric flocculent to the sludge, mixing the flocculated sludge with a slurry containing a small percentage of newsprint pulp, thereafter dewatering the mixed flocculated sludge until a firm filter cake is obtained containing up to 25 percent dry solids and a clear filtrate is obtained, and lastly dewatering the filter cake to yield a final product containing up to 49 per- cent dry solids.

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