Waste water treatment
Abstract
Abstract THE PRESENT DISCLOSURE RELATES TO A PROCESS AND AN APPARATUS FOR AFFECTING THE PROCESS FOR THE REMOVAL OF VARIOUS CONTAMINANTS FROM WASTE WATERS AND IN PARTICULAR, FROM INDUSTRIAL WASTE WATERS. WATER SYSTEMS ARE CONVENTIONALLY TREATED WITH CHROMATE, PHOSPHATE AND ZINC COMPOUNDS EITHER ALONE OR IN COMBINATION WITH EACH OTHER AND WITH BIOCIDES AND THE PRESENT INVENTION PROVIDES FOR THE REMOVAL OF THESE MATERIALS FROM THE WATER AND ANY OIL DISPERSED THEREIN PRIOR TO ITS DISPOSAL. THE WATER IS FIRST ACIDIFIED, PASSED THROUGH A UNIT CONTAINING A BED OF METAL PARTICLES, PASSED INTO A MIXING TANK AND THEN INTO A FLOCCULATING TANK WHERE THE WATER IS BROUGHT TO AN ALKALINE PH. VARIOUS INSOLUBLE PRECIPITATES ARE FORMED WHICH ARE SEPARATED FROM THE SOLUTION BY DEPOSITION IN A SETTING TANK AND BY FILTRATION.
Inventors
- 👤 Philip J Gaughan
- 👤 James K Brown
- 👤 Charles A Noll
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |