Patent US3897334A successfully refreshed from Google Patents.
US3897334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single basin aerated sewage lagoon with spring time intensified aeration
Assignee: Atara Corp
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Filing: 1972-03-14
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Granted: 1975-07-29
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Expires: 1992-03-14
Abstract
Abstract An aerated sewage lagoon has aerators disposed densely near the inflow, then gradually less densely proceeding towards the outflow and then densely disposed again and finally an area of no aeration. The aerators can be shut off so that in spring there is a second high intensity area to cope with the suddenly increased demand due to winter dormancy; and in summer the high intensity aeration is followed by an area over which the aeration continues but at gradually reduced intensity as the sewage moves downstream to the outflow. In winter aerators nearer the outflow can be shut off entirely.
Inventors
- 👤 Declan S Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:15
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
171 words
A METHOD OF SEWAGE TREATMENT COMPRISING: INTRODUCING RAW SEWAGE FROM AN INLET AT ONE END OF A LAGOON, PASSING SAID SEWAGE THROUGH THE LAGOON IN A FLOW PATH AND REMOVING THE TREATED EFFLUENT AT AN OUTLET AT THE OPPOSITE END OF SAID LAGOON, TREATING SAID SEWAGE IN A FIRST ZONE OF HIGH INTENSITY AERATION PROVIDED BY A FIRST DENSELY DISPOSED MULTIPLE OF AERATORS LOCATED IN ROWS ACROSS THE FLOW PATH IN SAID LAGOON ADJACENT THE INLET, FURTHER TREATING SAID SEWAGE IN A SECOND ZONE OF HIGH INTENSITY AERATION PROVIDED BY A SECOND MULTIPLE OF AERATORS LOCATED IN ROWS ACROSS THE FLOW PATH BETWEEN SAID FIRST MULTIPLE AND SAID OUTLET, SAID SECOND MULTIPLE OF AERATORS BEING LESS DENSELY DISPOSED THAN SAID FIRST MULTIPLE OF AERATORS, SUBJECTING SAID SEWAGE TO A THIRD ZONE OF HIGH INTENSITY AERATION PROVIDED BY A THIRD MULTIPLE OF AERATORS LOCATED IN ROWS ACROSS THE FLOW PATH BETWEEN SAID SECOND MULTIPLE OF AERATORS AND SAID OUTLET, SAID THIRD MULTIPLE BEING MORE DENSELY DISPOSED THAN SAID SECOND MULTIPLE OF AERATORS,
Claim 2
Independent Claim
171 words
A METHOD OF SEWAGE TREATMENT COMPRISING: INTRODUCING RAW SEWAGE FROM AN INLET AT ONE END OF A LAGOON, PASSING SAID SEWAGE THROUGH THE LAGOON IN A FLOW PATH AND REMOVING THE TREATED EFFLUENT AT AN OUTLET AT THE OPPOSITE END OF SAID LAGOON, TREATING SAID SEWAGE IN A FIRST ZONE OF HIGH INTENSITY AERATION PROVIDED BY A FIRST DENSELY DISPOSED MULTIPLE OF AERATORS LOCATED IN ROWS ACROSS THE FLOW PATH IN SAID LAGOON ADJACENT THE INLET, FURTHER TREATING SAID SEWAGE IN A SECOND ZONE OF HIGH INTENSITY AERATION PROVIDED BY A SECOND MULTIPLE OF AERATORS LOCATED IN ROWS ACROSS THE FLOW PATH BETWEEN SAID FIRST MULTIPLE AND SAID OUTLET, SAID SECOND MULTIPLE OF AERATORS BEING LESS DENSELY DISPOSED THAN SAID FIRST MULTIPLE OF AERATORS, SUBJECTING SAID SEWAGE TO A THIRD ZONE OF HIGH INTENSITY AERATION PROVIDED BY A THIRD MULTIPLE OF AERATORS LOCATED IN ROWS ACROSS THE FLOW PATH BETWEEN SAID SECOND MULTIPLE OF AERATORS AND SAID OUTLET, SAID THIRD MULTIPLE BEING MORE DENSELY DISPOSED THAN SAID SECOND MULTIPLE OF AERATORS,
Claim 3
Dependent Claim
52 words
The method of claim 1 wherein certain of said conduits to said third multiple of aerators are closed by closure means actuated by a timing mEans, said closure means being activated by said timing means at a preset time measured from the time at which the lagoon temperature rises above about 10*C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |