Liquefying de-watered sludge preparatory to drying

Details Liquefying de-watered sludge preparatory to drying Liquefying de-watered sludge preparatory to drying

C - Chemistry, Metallurgy

02

F

C02F 11/18 (2006.01) C02F 11/00 (2006.01) C02F 11/12 (2006.01)

Patent

CA 2623785

Sewage sludge that has been de-watered to 25% solids is subjected to a combination of shearing and heating that liquefies the sludge, and drops its viscosity to below 12,000 cP. The fact of liquefaction prepares the sludge such that subsequent drying can be done more cost-effectively than hitherto. After drying, the dried sludge can be incinerated.

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