US3756410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage disposal effluent purifier
Assignee: Moody Aquamatic System Inc
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Filing: 1971-11-08
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Granted: 1973-09-04
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Expires: 1991-11-08
Abstract
Abstract Liquid sewage, which preferably has been subjected to a primary sewage treatment phase to minimize its turbidity, is fed to a contact tank where it passes through a porous filter that removes any remaining solids, and then has ozone gas bubbled through it to oxidize impurities in the liquid and to remove objectionable odors. An ozone gas diffuser is mounted in the tank beneath the filter so that any excess ozone gas will pass upwardly through the filter to keep it purified. A plurality of ozone generators are used to supply the ozone gas continuously to the tank; and a stepper switch automatically and successively energizes the generators one by one in a continuous cycle.
Inventors
- 👤 D Moody
- 👤 V Troglione
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:24
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/78; B; B01; B01D; B01D29/00; B01D29/01
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
286 words
Apparatus for purifying sewage effluent, comprising a tank having an inlet adjacent its upper end connected to a supply of liquid sewage effluent, and having an outlet spaced beneath said inlet, a baffle extending across said tank between said inlet and said outlet, and having a lower edge slightly above the bottom of said tank and an upper edge projecting above said inlet, whereby liquid sewage entering through said inlet must pass downwardly in said tank and beneath the lower edge of said baffle to reach said outlet. a porous filter for removing solids from the sewage water entering said tank, means mounting said filter in said tank beneath said inlet, and between said bafflE and the portion of the tank containing said inlet, so that any liquid sewage entering the tank through said inlet must pass downwardly through said filter before passing beneath said baffle for discharge from the tank through said outlet, a diffuser mounted in said tank adjacent the lower end thereof, with at least a portion of said diffuser being positioned beneath and in registry with said filter, means of supplying ozone gas to said diffuser for distribution thereby into the liquid effluent in said tank in the form of small bubbles of ozone gas, and means for venting the upper end of said tank to atmosphere so that the level of the liquid in the tank normally is spaced beneath said upper end, said mounting means supporting said filter with the upper surface thereof confronting on the space formed in said tank above the level of the liquid in said tank, whereby said upper surface is exposed to any excess ozone gas that bubbles upwardly through said liquid to said space.
Claim 2
Dependent Claim
286 words
Apparatus for purifying sewage effluent, comprising a tank having an inlet adjacent its upper end connected to a supply of liquid sewage effluent, and having an outlet spaced beneath said inlet, a baffle extending across said tank between said inlet and said outlet, and having a lower edge slightly above the bottom of said tank and an upper edge projecting above said inlet, whereby liquid sewage entering through said inlet must pass downwardly in said tank and beneath the lower edge of said baffle to reach said outlet. a porous filter for removing solids from the sewage water entering said tank, means mounting said filter in said tank beneath said inlet, and between said bafflE and the portion of the tank containing said inlet, so that any liquid sewage entering the tank through said inlet must pass downwardly through said filter before passing beneath said baffle for discharge from the tank through said outlet, a diffuser mounted in said tank adjacent the lower end thereof, with at least a portion of said diffuser being positioned beneath and in registry with said filter, means of supplying ozone gas to said diffuser for distribution thereby into the liquid effluent in said tank in the form of small bubbles of ozone gas, and means for venting the upper end of said tank to atmosphere so that the level of the liquid in the tank normally is spaced beneath said upper end, said mounting means supporting said filter with the upper surface thereof confronting on the space formed in said tank above the level of the liquid in said tank, whereby said upper surface is exposed to any excess ozone gas that bubbles upwardly through said liquid to said space.
Claim 3
Dependent Claim
36 words
Apparatus as defined in claim 1, wherein said filter is buoyant, and is guided by said baffle and said portion of said tank to float therebetween on the surface of the liquid sewage in said tank.
Claim 4
Dependent Claim
26 words
Apparatus as defined in claim 1, wherein said diffuser extends beneath said lower edge of said baffle and laterally beyond opposite sides, respectively, of said baffle.
Claim 5
Dependent Claim
77 words
Apparatus as defined in claim 3 wherein said tank is cylindrical and said inlet and said outlet open on diametrically opposite sides, respectively, of said tank, said baffle comprises a vertical plate extending between opposite sides of said tank transverse to the axes of said inlet and said outlet, and said filter is segmental cylindrical in configuration, having a plane surface confronting said plate and an arcuate surface confronting said portion of the tank containing said inlet.
Claim 6
Dependent Claim
24 words
Apparatus as defined in claim 2, wherein said filter comprises a hollow housing containing superposed layers of metal screen, activated charcoal and sand, respectively.
Claim 7
Dependent Claim
52 words
Apparatus as defined in claim 1, wherein said means for supplying ozone gas comprises a plurality of ozone generators, means connecting the outputs of said generators to said diffuser, and control means for cyclically and successively actuating said generators one at a time thereby continuously to supply ozone gas to said diffuser.
Claim 8
Dependent Claim
57 words
Apparatus as defined in claim 6, including a supply of compressed air, means for selectively connecting said compressed air supply to the interior of said tank adjacent said lower end thereof, and means responsive to said control means selectively to connect said compressed air supply to the input of the ozone generator actuated by said control means.
Claim 9
Dependent Claim
213 words
Apparatus for purifying sewage effluent, comprising a tank having an inlet connected to a supply of liquid sewage, and an outlet for discharging the sewage from said tank after it has been purified, a porus filter mounted in said tank transverse to the path of flow of sewage through the tank to filter solids from the sewage before it is discharged from said outlet, means including a diffuser for bubbling ozone gas into said sewage after it has passed through said filter, and during the flow of said sewage toward said outlet, thereby to purify said sewage, said tank having therein a chamber disposed to receive excess ozone gas that is bubbled through said sewage without being absorbed thereby, said filter having a portion thereof contronting on said chamber to be exposed to said excess ozone gas therein, and a baffle mounted in said tank between said inlet and said outlet and operative to cause sewage passing through said tank to flow first in one direction from said inlet toward said diffuser, and then in the opposite direction from said diffuser toward said outlet, said filter being disposed between said baffle and the side of said tank containing said inlet thereby to filter said sewage during the Flow thereof in said one direction.
Claim 10
Dependent Claim
213 words
Apparatus for purifying sewage effluent, comprising a tank having an inlet connected to a supply of liquid sewage, and an outlet for discharging the sewage from said tank after it has been purified, a porus filter mounted in said tank transverse to the path of flow of sewage through the tank to filter solids from the sewage before it is discharged from said outlet, means including a diffuser for bubbling ozone gas into said sewage after it has passed through said filter, and during the flow of said sewage toward said outlet, thereby to purify said sewage, said tank having therein a chamber disposed to receive excess ozone gas that is bubbled through said sewage without being absorbed thereby, said filter having a portion thereof contronting on said chamber to be exposed to said excess ozone gas therein, and a baffle mounted in said tank between said inlet and said outlet and operative to cause sewage passing through said tank to flow first in one direction from said inlet toward said diffuser, and then in the opposite direction from said diffuser toward said outlet, said filter being disposed between said baffle and the side of said tank containing said inlet thereby to filter said sewage during the Flow thereof in said one direction.
Claim 11
Dependent Claim
48 words
Apparatus as defined in claim 8, wherein said means for bubbling ozone gas into said sewage further comprises a plurality of ozone generators having their outputs connected to said diffuser to supply ozone gas thereto, and electrical control means for intermittently actuating said generators one at a time.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |