Method of removing metallic impurities from sewage sludge

Details Method of removing metallic impurities from sewage sludge Method of removing metallic impurities from sewage sludge

C - Chemistry, Metallurgy

02

F

362/2

C02F 11/00 (2006.01) C02F 1/72 (2006.01) C02F 11/18 (2006.01)

Patent

CA 1102456

- 1 - Abstract: A method of removing metallic impurities from sewage sludge wherein the sludge is first acidified in the presence of an oxidising agent and held to take metallic impurities into solution. The sludge is then treated with a flocculating agent and thickened by removing liquid prior to dilution with an aqueous liquid free from metallic impurities and wherein the sludge is finally dewatered by a mechanical method.

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