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Patent US3773179A successfully refreshed from Google Patents.
US3773179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating waste fluids by means of dissolved gases
Assignee: POLLUTION CONTROL ENGINEERING
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Filing: 1971-09-28
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Granted: 1973-11-20
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Expires: 1991-09-28
Abstract
Abstract Apparatus for treating waste water and the like to remove suspended pollutants therefrom comprising a tank having a plurality of compartments wherein the fluid is repeatedly pumped from one compartment to the next. At each pumping station, gas is injected at the suction side of the pump and back pressure is maintained in the discharge line to force more gas into solution. Effluent from each compartment is taken near the bottom and the discharge is located midway of the height, confined to a small area and then deflected by a deflector plate. Clarified water is removed by a riser tube from the bottom of the final compartment and flows over a weir. The floated matter is removed from the fluid surfaces in each compartment by skimming or other known methods.
Inventors
- 👤 G Hurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:50
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
Apparatus for treating fluids to remove suspended pollutants therefrom, comprising: a tank having a plurality of contiguous compartments, a first one of said compartments having a fluid inlet therein, a last one of said compartments having a fluid outlet; pump means coupled to said first compartment for pumping fluid out of said first compartment and then discharging it back into the same compartment, further pump means for pumping fluid from compartment to compartment terminating with said last compartment, injector means coupled to each of said pump means for injecting gas under pressure into said fluid prior to the discharge thereof into a compartment whereby some of said gas is forced into solution; means mounted upon said tank for collecting floated pollutants from the surface of the fluid in each compartment; and means for removing clarified fluid from said last compartment through said fluid outlet.
Claim 2
Dependent Claim
144 words
Apparatus for treating fluids to remove suspended pollutants therefrom, comprising: a tank having a plurality of contiguous compartments, a first one of said compartments having a fluid inlet therein, a last one of said compartments having a fluid outlet; pump means coupled to said first compartment for pumping fluid out of said first compartment and then discharging it back into the same compartment, further pump means for pumping fluid from compartment to compartment terminating with said last compartment, injector means coupled to each of said pump means for injecting gas under pressure into said fluid prior to the discharge thereof into a compartment whereby some of said gas is forced into solution; means mounted upon said tank for collecting floated pollutants from the surface of the fluid in each compartment; and means for removing clarified fluid from said last compartment through said fluid outlet.
Claim 3
Dependent Claim
56 words
The apparatus set forth in claim 1 further including conduit means coupled to the discharge side of each said pump means, each said conduit means extending into each compartment and having a discharge end stationed therein, deflector means mounted in each said compartment, the discharge end of each said conduit being directed toward said deflector means.
Claim 4
Dependent Claim
30 words
The apparatus set forth in claim 2 further including means mounted in each said conduit downstream of said pump means for creating back pressure in said conduit and said pump.
Claim 5
Dependent Claim
58 words
The apparatus set forth in claim 1 wherein said pollutant collecting means comprises an annular trough formed about the upper interior periphery of said tank, a plurality of adjustable weir gates stationed upon said trough each of said weir gates so positioned as to communicate each compartment with said trough, and an oulet means coupled to said trough.
Claim 6
Dependent Claim
29 words
The apparatus set forth in claim 1 wherein each of said compartments is separated by a partition, weep holes formed in each partition near the bottom of said tank.
Claim 7
Dependent Claim
59 words
The apparatus set forth in claim 4 wherein said means for removing clarified water comprises a riser, a weir box mounted at the top of said riser, an adjustable weir gate in said weir box whereby the level of fluid in said tank may be controlled consistent with the position of the aforesaid weir gates mounted on said trough.
Claim 8
Dependent Claim
48 words
The apparatus set forth in claim 2 wherein said deflector means comprises a planar member having a plurality of apertures therein, said member being mounted in said compartment intermediate the height thereof, said member being situated at an angle with respect to the vertical height of said tank.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |