Back to results
US 4,306,968 AGranted
Sewage treatment system
AssigneeMcNeil Corporation
InventorKenneth J. Yost
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeMcNeil Corporation
InventorKenneth J. Yost
Estimating the term…
A sewage treatment system comprising means defining a receptacle including at least one chamber for receiving a body of sewage composed of liquid and solids the top of which is exposed to air, means for applying air, under pressure, immediately below the upper surface of said body of sewage in said one chamber, at an angle thereto to physically lift portions of said sewage from the upper surface of said body thereof in a spray form, thereby to expose said lifted portions to air and to infuse said portions with oxygen, the nature and angle of application of the air being effective at the same time to induce a current in the body of sewage having a downward spiral and an ever-decreasing velocity, said current being effective to induce suspended solids to be driven to the bottom of said chamber together with the heavy solids settled thereon, thereby to facilitate an extremely rapid aerobic digestion.
A sewage treatment system comprising means defining at least one chamber for receiving a body of sewage composed of liquid and solids the upper surface of which body is exposed to air, means for delivering air under pressure to first enter said body of sewage in said at least one chamber at a point slightly below the upper surface thereof comprising a nozzle structure with a generally rectangular outlet having a width greater than its height and at a downwardly directed angle to said upper surface to physically lift portions of said body from said upper surface in a spray form, thereby to disperse said lifted portions in the air above said upper surface in the form of finely divided liquid and solid fractions thereof and to infuse said fractions with oxygen for return therewith to said body under the influence of gravity to propagate aerobic digestion throughout said body.
A sewage treatment system comprising at least one chamber for receiving a body of sewage composed of liquids and solids, means for delivering air under pressure to first enter said body of sewage at a point below the upper surface thereof at an angle to said upper surface to lift portions of said body of sewage from the upper surface in a spray form and to cause said body of sewage to rotate with a downwardly spiralling current therein to force suspended solids to the bottom of said chamber, said air delivering means comprising a nozzle with a generally rectangular outlet having a width greater than its height and angled downwardly into said body of sewage.
Dependencies are inferred from the claim text.