C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/62, 204/89
C02F 1/00 (2006.01)
Patent
CA 1091830
WASTEWATER FLOTATION Abstract of the Disclosure: A flow of wastewater is adjusted to near zero streaming potential by injecting a combination of a mineral acid and a multivalent metal coagulant into the wastewater. The potential is measured in streaming detector units. The thus adjusted flow enters a coagulation cell for contacting the flow with dense quantities of small bubbles to form an initial floc. The flow then passes to a basin where a combined floc is separated and skimmed along the surface of the basin to a location generally above the entrance to the basin. A supplemental supply of bubbles preferably is maintained below the surface of the skimmings at this location in order to decrease the water content of the skimmings.
293867
Johnson Dennis L.
Ramirez Ernest R.
Dravo Corporation
Gowling Lafleur Henderson Llp
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