US3607737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the aerobic purification of sewage water at a temperature higher than the ambient temperature
Assignee: Xylem Water Solutions AB
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Filing: 1969-01-28
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Granted: 1971-09-21
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Expires: 1989-01-28
Abstract
Abstract An aerobic method for purification of sewage water taking place at a sludge temperature above the ambient temperature, according to which method sludge is at first sedimented and then passed to a reactor vessel of small size, which vessel is insulated against loss of heat to the surroundings and in which vessel the sludge is subjected to exothermic oxygenation, while retaining the reaction heat generated.
Inventors
- 👤 Sven Gustaf Yngve Gamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:15
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/121; C02F3/006; C02F3/1221; C02F3/1236; C02F3/1242; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
In an apparatus for the aerobic purification of sewage water, means for separating the sludge contained in the sewage water from the main body of the sewage water by sedimentation, an aerating reactor vessel of small volume corresponding to a small portion of the main body of the sewage water, said vessel having small outer defining surfaces, insulating layers arranged at said surfaces against loss of heaT to the surroundings, a blower device to aerate the sludge during operation of the system, means for recovering compression heat generated by said blower device, means for passing said recovered heat to the reactor vessel during the starting of the same, a reactor vessel cover member for collecting moist air departing from the reactor, and means for using said moist air to preheat the fresh air passed to the blower device.
Claim 2
Dependent Claim
50 words
The apparatus of claim 2 wherein the reactor vessel is provided with a heat responsive member which electrically regulates the supply of additional sludge to the reactor vessel dependent upon the sludge temperature therein, so that the supply of sludge is increased upon reaching optimum reaction temperature in the reactor.
References 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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |