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US 4,216,085 AGranted
Flotation method and apparatus
AssigneeIowa Beef Processors, Inc.
InventorJimmie A. Chittenden
Life of this patent
Estimating the term…
Abstract
Aerated liquid injected into contaminated wastewater provides minute bubbles which ascend slowly and become attached to contaminants to buoy them to the liquid surface. To produce an intimate mix of the aerated liquid and wastewater, the aerated liquid is injected into the wastewater through opposed mutually confronting openings. Streams emerging from the openings collide to create an area of high turbulence.
Claims20
Apparatus for removing contaminants from wastewater, comprising,
- a flotation chamber,
- inlet means for introducing wastewater into the flotation chamber, said inlet means including walls for enclosing a stream of wastewater moving in an axial flow path,
- effluent discharge means for discharging clarified liquid from the flotation chamber at a location spaced from said inlet means,
- means for producing a gas-containing liquid,
- supply means for introducing said gas-containing liquid into the wastewater,
- said supply means have a pair of discharge openings located in the inlet means and surrounded by the wall of the inlet means, said discharge openings being in spaced opposed mutually confronting relationship whereby streams of gas-containing liquid emerging therefrom collide to create an area of high turbulence and produce an intimate mix of gas-containing liquid and wastewater.
3 more elements
A method of removing contaminants from wastewater comprising the steps of
- moving the wastewater in an axial flow path through an inlet passage to a flotation tank
- introducing gas-containing liquid into the wastewater by directing two streams of said liquid against each other within said inlet passage located in the inlet means and surrounded by the walls of the inlet means, said streams colliding to provide an area of high turbulence and produce an intimate mix of said liquid and wastewater, introducing said intimate mix into said flotation chamber, and
- buoying contaminants to the surface of said mix by permitting bubbles formed in said liquid to attach themselves to said contaminants.
Dependencies are inferred from the claim text.