Method and apparatus for sewage treatment
Abstract
Abstract A SEWAGE TREATMENT SYSTEM COMPRISES A TANK CONTAINING SEWAGE TO BE AERATED AND CIRCULATED BY AN AERATION ROTOR PARTIALLY IMMERGED IN THE LIQUID CONTAINED IN THE TANK. THE AERATOR IS SUSPENDED FROM A FLOATING SYSTEM WHICH IS FLOATING ON THE LIQUID IN THE TANK, SO THAT THE AERATOR CAN MOVE UP AND DOWN WITH THE VARYING LIQUID LEVEL IN THE TANK. AT CERTAIN PERIODS, AS FOR EXAMPLE DURING THE NIGHT WHEN NO SEWAGE IS SUPPLIED, THE AERATOR IS STOPPED SO THAT SLUDGE IS ALLOWED TO SETTLE TO THE BOTTOM OF THE TANK AND CLARIFIED LIQUID CAN BE WITHDRAWN FROM THE UPPER PORTION OF THE TANK, WHILE AT DAYBREAK WHEN SEWAGE BEGINS TO ACCUMULATE, THE AERATOR IS OPERATED TO DIFFUSE ATMOSPHERIC OXYGEN IN THE LIQUID IN THE TANK AND ACTIVATE THE SLUDGE CONTAINED THEREIN.
Inventors
- 👤 Joseph Richard Kaelin
Bibliographic Details
Claims Analysis
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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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |