C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/2
C02F 11/12 (2006.01) B01D 37/00 (2006.01) B01D 37/03 (2006.01) C02F 1/54 (2006.01)
Patent
CA 1172391
Abstract of the Disclosure: A process for dewatering sewage sludges of which the sludge solids contain less than 70% of organic matter, and whose dewatering charac- teristics have been improved by adding organic flocculants, on a filter press, wherein the sewage sludges are concen- trated by adding an organic flocculant during thickening by gravity sedimentation from 0.5-5,0% by weight of sludge solids to 6-14, and especially 8-12, % by weight of sludge solids, the sewage sludges are mixed with additives, such as finely divided coal or ash or mixtures thereof, in an amount of from 0.5 to 1.5 parts by weight per part by weight of sludge solids, and the sludges are treated, before, during or after admixture of the additives, with a further 2-8 kg of organic flocculant/tonne of sludge solids and are then dewatered on the filter press.
390331
Lauer Herbert
Neuwirth Manfred
Sander Bruno
Basf Aktiengesellschaft
Robic Robic & Associes/associates
LandOfFree
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