Control system for waste water treatment plants
Abstract
Abstract A CONTROL SYSTEM FOR A SEWAGE PLANT HAVING MULTIPLE TANKS IN WHICH SEWAGE IS TREATED PRIOR TO DISCHARGING IT TO A RECEIVING STREAM. A DEVICE IN ONE TANK DETECTS AND MEASURES THE CONCENTRATION OF SUSPENDED SOLIDS THEREIN AND PROVIDES AN OUTPUT SIGNAL REPRESENTATIVE OF THE AMOUNT OF SOLIDS. SYSTEM COMPONENTS RESPOND TO THE SIGNALS AND SELECTIVELY CONTROL OPERATION OF A PUMP AND VALVE IN A LINE INTERCONNECTING TWO OF THE TANKS FOR RETURNING ACIVATED SLUDGE AT UNIFORM OR VARYING FLOW RATES, FROM ONE TANK TO ANOTHER TO AID IN THE SEWAGE DECOMPOSITION PROCESS, AND/OR PUMPING THE ACTIVATED SLUDGE TO WASTE. THE CONTROL COMPONENTS ALSO CONTROL THE DELIVERY OF AIR TO THE TANK BEING TREATED. BY UTILIZING A SYSTEM OF THIS TYPE, THE SUSPENDED SOLIDS CONCENTRATION CAN BE CLOSELY HELD WITHIN TOLERABLE LIMITS AND THEREBY PROVIDE EFFLUENT OF THE DESIRED QUALITY TO R RECEIVING STREAM.
Inventors
- 👤 Thomas A Rose
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |