Activated sludge sewage treatment process and system
Abstract
Abstract AN ACTIVATED SLUDGE SEWAGE TREATMENT PROCESS AND SYSTEM WHICH INCLUDES AN INITIAL ENCLOSED AERATION CHAMBER PROVIDING A VESSEL FOR AMIXED LIQUOR FORMED FROM A LIQUID BIOLOGICALLY DEGRADABLE WASTE AND RECIRCULATED SLUDGE WHERE THE LIQUOR IS AERATED IN AN OXYGEN ENRICHED ENVIRONMENT AND A SUBSEQUENT AERATION CHAMBER WHERE THE LIQUOR, AFTER BEING TREATED IN THE INITIAL CHAMBER, IS AERATED IN THE SUBSEQUENT CHAMBER IN THE PRESENCE OF ATMOSPHERIC AIR OR A GAS WHICH HAS A SLIGHTLY HIGHER PERCENTAGE OF OXYGEN ENRICHMENT THAN ATMOSPHERIC AIR. THE SYSTEM IS DESIGNED SO THAT BETWEEN 15 TO 95% OF THE OXYGEN UTILIZED BY THE MIXED LIQUOR, TO EFFECT BIOLOGICAL DEGRADATION, IS UTILIZED BY THE LIQUOR IN THE INITIAL CHAMBER AND THE REMAINDERO THE OXYGEN UTILIZED BY THE LIQUOR FOR BIOLOGICAL DEGRADATION IS UTILIZED IN THE LIQUOR WHEN THE LIQUOR IS IN THE SUBSEQUENT AERATION CHAMBER.
Inventors
- 👤 M Spector
- 👤 R Jones
- 👤 C Mcdowell
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |