US4758339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equipment for the anaerobic purification of waste water
Assignee: Paques BV
•
Filing: 1987-04-29
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Granted: 1988-07-19
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Expires: 2007-04-29
Abstract
Abstract To avoid considerable vertical and horizontal flows in the settler formed by gas collection hoods, of the upflow anaerobic sludge blanket (U.A.S.B.) reactor, each gas collection hood (3) debouches at one or two ends into a gas collection chamber (8) via one or more openings (19), the upper boundary of said openings being situated below the inside surface of the projection or the top of the hood (3) concerned. The gas collection hoods are situated immediately below the level of the effluent discharge and the depth of the settler is shallow. As a result of the decrease in pressure only a few gas bubbles are consequently liberated and the settling of the sludge is not appreciably disturbed.
Inventors
- 👤 Sjoerd H. J. Vellinga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:16
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; C02F3/2846; C02F1/00; C02F1/006; Y; Y02; Y02E; Y02E50/00; Y02E50/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
In a reactor for the anaerobic purification of waste water comprising a fermentation section including means for feeding waste water, a settler provided above said fermentation section, and means for discharge of purified water provided at the top of or above said settler, said settler comprising at least one tier of gas collection hoods, the improvement wherein each said hood includes a gas discharge means located at at least one end thereof, each gas discharge means including, in communication, an inlet means for gas to be discharged open to said hook and located below the top of said hood, and an outlet means for gas to be discharged having an upper boundary located below said inlet means, so as to prevent liquid from flowing into said gas discharge means.
Claim 2
Dependent Claim
129 words
In a reactor for the anaerobic purification of waste water comprising a fermentation section including means for feeding waste water, a settler provided above said fermentation section, and means for discharge of purified water provided at the top of or above said settler, said settler comprising at least one tier of gas collection hoods, the improvement wherein each said hood includes a gas discharge means located at at least one end thereof, each gas discharge means including, in communication, an inlet means for gas to be discharged open to said hook and located below the top of said hood, and an outlet means for gas to be discharged having an upper boundary located below said inlet means, so as to prevent liquid from flowing into said gas discharge means.
Claim 3
Dependent Claim
22 words
A reactor according to claim 1, additionally comprising a gas collection chamber in communication with said outlet for gas to be discharged.
Claim 4
Dependent Claim
44 words
A reactor according to claim 2, wherein said gas discharge means comprises a receptacle including a plurality of walls, one said wall including said inlet means for gas to be discharged, and another said wall including said outlet means for gas to be discharged.
Claim 5
Dependent Claim
45 words
A reactor according to claim 3, wherein said inlet means is located in a wall facing the top of the hood or in a wall facing the length of the hood, and said outlet means is located in a wall facing the gas collection chamber.
References Cited (Backward Citations)
FR833184A
Cited
US4253956A
Cited
US4391704A
Cited
EP0096825A1
Cited
US4613434A
Cited
US4530762A
Cited
US4622147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |