Patent US3894953A successfully refreshed from Google Patents.
US3894953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wastewater treatment plant
Assignee: Siemens Water Technologies Holding Corp
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Filing: 1973-05-29
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Granted: 1975-07-15
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Expires: 1993-05-29
Abstract
Abstract A modified septic tank with a plurality of troughs arranged to be fed in parallel controls the detention time of wastewater passing through the troughs to the range of from 2 to 4 hours thereby minimizing the addition of gasses to the effluent wastewater, particularly hydrogen sulphide that is evolved in the lower portion of the tank in connection with the digestion of settled organic solids. A biological treatment unit such as those employing rotating contactors can be provided to treat the effluent from the septic tank. The substantial reduction in hydrogen sulphide in the effluent wastewater from the septic tank makes available a maximum amount of surface for the growth and maintenance of organisms oxidizing carbonaceous and/or nitrogenous pollutants on the downstream rotating contactors.
Inventors
- 👤 Wilbur N Torpey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:49
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/08; C02F3/082; B; B01; B01D; B01D21/00; B01D21/0039; B01D21/0042; B01D21/02; B01D21/24; B01D21/2488; C02F3/12; C02F3/1205; C02F3/121; C02F3/28; C02F3/30; C02F3/302; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
260 words
A WASTEWATER TREATMENT PLANT FOR TREATING WASTEWATER CONTAINING SETTLEABLE ORGANIC SOLIDS, COMPRISING A SETTLING TANK STRUCTURE FOR CONFINING SAID WASTEWATER AT A PREDETERMINED DEPTH, SAID TANK STRUCTURE BEING DEFINED BY A PAIR OF SIDE WALLS SEPARATED BY AN END WALL AT EACH END AND A BOTTOM WALL, INLET MEANS DISPOSED ADJACENT ONE OF SAID END WALLS FOR SUPPLYING WASTEWATER TO SAID SETTLING TANK, OUTLET MEANS DISPOSED ADJACENT THE OTHER OF SAID END WALLS FOR REMOVING WASTEWATER FROM SAID SETTLING TANK, A BIOLOGICAL TREATMENT UNIT INCLUDING A PLURALITY OF ROTATABLE CONTACTORS HAVING SURFACE AREA FOR THE GROWTH AND MAINTENANCE OF AEROBIC BIOLOGICAL SLIMES, AND CONDUIT MEANS FOR SUPPLYING EFFLUENT WASTEWATER FROM SAID OUTLET MEANS OF SAID SETTLING TANK TO SAID BIOLOGICAL TREATMENT UNIT, SAID SETTLING TANK STRUCTURE INCLUDING A PLURALITY OF TROUGHS EXTENDING BETWEEN AND COMMUNICATING WITH SAID INLET AND OUTLET MEANS, SAID TROUGHS BEING ARRANGED TO RECEIVE WASTEWATER FROM SAID INLET MEANS IN PARALLEL, EACH OF SAID WASTEWATER TO SAID OUTLET MEANS IN PARALLEL, EACH OF SAID TROUGHS BEING SPACED FROM EACH OTHER AND THE SIDE WALLS OF SAID SETTLING TANK STRUCTURE AND INCLUDING PASSAGE MEANS FOR PERMITTING SOLIDS SETTLED THEREIN TO PASS INTO THE PORTION OF SAID SETTLING TANK BENEATH SAID TROUGHS AND ABOVE SAID BOTTOM WALL WHEREIN SETTLED ORGANIC SOLIDS ARE DIGESTED ANAEROBICALLY, SAID PLURALITY OF TROUGHS BEING ADAPTED TO PROVIDE SAID WASTEWATER WITH A DETENTION TIME IN SAID SETTLING TANK OF FROM ABOUT 2 TO ABOUT 4 HOURS AND SUPPLY INFLUENT WASTEWATER TO SAID BIOLOGICAL TREATMENT UNIT THAT IS VIRTUALLY FREE FROM SIGNIFICANT AMOUNTS OF HYDROGEN SULPHIDE.
Claim 2
Dependent Claim
260 words
A WASTEWATER TREATMENT PLANT FOR TREATING WASTEWATER CONTAINING SETTLEABLE ORGANIC SOLIDS, COMPRISING A SETTLING TANK STRUCTURE FOR CONFINING SAID WASTEWATER AT A PREDETERMINED DEPTH, SAID TANK STRUCTURE BEING DEFINED BY A PAIR OF SIDE WALLS SEPARATED BY AN END WALL AT EACH END AND A BOTTOM WALL, INLET MEANS DISPOSED ADJACENT ONE OF SAID END WALLS FOR SUPPLYING WASTEWATER TO SAID SETTLING TANK, OUTLET MEANS DISPOSED ADJACENT THE OTHER OF SAID END WALLS FOR REMOVING WASTEWATER FROM SAID SETTLING TANK, A BIOLOGICAL TREATMENT UNIT INCLUDING A PLURALITY OF ROTATABLE CONTACTORS HAVING SURFACE AREA FOR THE GROWTH AND MAINTENANCE OF AEROBIC BIOLOGICAL SLIMES, AND CONDUIT MEANS FOR SUPPLYING EFFLUENT WASTEWATER FROM SAID OUTLET MEANS OF SAID SETTLING TANK TO SAID BIOLOGICAL TREATMENT UNIT, SAID SETTLING TANK STRUCTURE INCLUDING A PLURALITY OF TROUGHS EXTENDING BETWEEN AND COMMUNICATING WITH SAID INLET AND OUTLET MEANS, SAID TROUGHS BEING ARRANGED TO RECEIVE WASTEWATER FROM SAID INLET MEANS IN PARALLEL, EACH OF SAID WASTEWATER TO SAID OUTLET MEANS IN PARALLEL, EACH OF SAID TROUGHS BEING SPACED FROM EACH OTHER AND THE SIDE WALLS OF SAID SETTLING TANK STRUCTURE AND INCLUDING PASSAGE MEANS FOR PERMITTING SOLIDS SETTLED THEREIN TO PASS INTO THE PORTION OF SAID SETTLING TANK BENEATH SAID TROUGHS AND ABOVE SAID BOTTOM WALL WHEREIN SETTLED ORGANIC SOLIDS ARE DIGESTED ANAEROBICALLY, SAID PLURALITY OF TROUGHS BEING ADAPTED TO PROVIDE SAID WASTEWATER WITH A DETENTION TIME IN SAID SETTLING TANK OF FROM ABOUT 2 TO ABOUT 4 HOURS AND SUPPLY INFLUENT WASTEWATER TO SAID BIOLOGICAL TREATMENT UNIT THAT IS VIRTUALLY FREE FROM SIGNIFICANT AMOUNTS OF HYDROGEN SULPHIDE.
Claim 3
Dependent Claim
77 words
A wastewater treatment plant according to claim 1, wherein said inlet means includes a receiving chamber for said wastewater defined by at least a portion of one end wall of said tank structure and a weir member spaced from and parallel to said end wall, said weir member adapted to evenly transmit wastewater in said receiving chamber to each of said troughs and to exclude a flow of wastewater from said receiving chamber into said tank structure.
Claim 4
Dependent Claim
20 words
Apparatus according to claim 1, wherein said outlet means includes a manifold simultaneously removing wastewater from each of said troughs.
Claim 5
Dependent Claim
31 words
A wastewater treatment plant according to claim 1, wherein said inlet means includes distribution means for simultaneously supplying each of said troughs with a substantially equal portion of said raw wastewater.
Claim 6
Dependent Claim
30 words
A wastewater treatment plant according to claim 1, wherein said passage means includes a baffled longitudinal slot extending along the bottom of each of said troughs along its full length.
Claim 7
Dependent Claim
42 words
A wastewater treatment plant according to claim 5, wherein said longitudinal slot is formed by downwardly converging wall members of each of said troughs and one of said converging wall members extends below the point where the converging wall members would intersect.
Claim 8
Dependent Claim
15 words
A wastewater treatment plant according to claim 1, wherein said plurality is at least 3.
Claim 9
Dependent Claim
38 words
A treatment plant according to claim 1, wherein said predetermined depth is from about 10 to about 18 feet and the distance beneath said troughs and above said bottom wall is from about 3 to about 10 feet.
Claim 10
Dependent Claim
21 words
A treatment plant according to claim 8, wherein the distance between said end wall is not more than about 10 feet.
Claim 11
Dependent Claim
23 words
A treatment plant according to claim 9, wherein the width of each of said troughs is from about 2 to about 4 feet.
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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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |