Process for purifying sludge containing mainly water

Details Process for purifying sludge containing mainly water Process for purifying sludge containing mainly water

C - Chemistry, Metallurgy

02

F

C02F 11/14 (2006.01) C02F 1/52 (2006.01) C02F 1/54 (2006.01)

Patent

CA 2140631

The invention relates to a method for improving purification of sludge containing mainly water, so that before a mechani- cal dewatering stage two components are added to the sludge in order to improve its dewatering properties. First a water-contain- ing coagulating mixture is added, which contains a ferric salt and an organic polymer having a molecular weight of under 1 000 000, and then a polyelectrolyte with a molecular weight of above 3 000 000 is added.

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