US3919086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment apparatus
Assignee: Halliburton Nus Corp
•
Filing: 1973-09-11
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Granted: 1975-11-11
•
Expires: 1993-09-11
Abstract
Abstract A technique for modifying a conventional Imhoff tank, which utilizes an anaerobic wastewater treatment process, to obtain an activated sludge system which is an aerobic process, the modifications comprising providing a plurality of air sparges in the lower portion of the digestion chamber of the Imhoff tank to aerate the wastewater contained therein, providing a pump means in the tank which has its suction end near the apex of the inverted pyramid-bottom of the tank and its discharge end disposed in the gas vent area of the tank, and relocating the feed to the tank into the gas vent areas rather than into the center settling compartment which is conventional. Also disclosed is the modified apparatus comprising the standard Imhoff tank elements and the new elements provided by the technique of the present invention.
Inventors
- 👤 David F Peck
- 👤 Joseph C Troy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:05
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; C02F3/2866; C02F3/2886; C02F3/02; C02F3/12; C02F3/1236; C02F3/1242; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
11 words
AN APPARATUS FOR TREATING AND PURIFYING WASTEWATER CONTAINING ORGANIC POLLUTATS COMPRISING:
Claim 2
Independent Claim
11 words
AN APPARATUS FOR TREATING AND PURIFYING WASTEWATER CONTAINING ORGANIC POLLUTATS COMPRISING:
Claim 3
Dependent Claim
18 words
A VESSEL HAVING VERTICAL END AND SIDEWALLS AND A BOTTOM PORTION IN THE SHAPE OF AN INVERTED PYRAMID,
Claim 4
Dependent Claim
18 words
A VESSEL HAVING VERTICAL END AND SIDEWALLS AND A BOTTOM PORTION IN THE SHAPE OF AN INVERTED PYRAMID,
Claim 5
Dependent Claim
69 words
AN INNER SETTLING COMPATMENT WITHIN SAID VESSEL AND SMALLER THAN SAID VESSEL DEFINED BY VERTICAL WALLS EXTENDING FROM ONE SIDE OF SAID VESSEL TO ITS OPPOSITE SAID, AND INCLINED LOWER PORTIONS WHICH DEFINE A SLOT COMMUNICATING BETWEEN SAID SETTLING COMPARTMENT AND THE LOWER PORTION OF SAID VESSEL, THE ERTIAL WALLS OF SAID SETTLING COMPARTMENT BEING SEPARATED FROM THE VERTICAL WALLS OF SAID VESSEL AND DEFINING A FIRST SPACE THEREBETWEEN,
Claim 6
Dependent Claim
69 words
AN INNER SETTLING COMPATMENT WITHIN SAID VESSEL AND SMALLER THAN SAID VESSEL DEFINED BY VERTICAL WALLS EXTENDING FROM ONE SIDE OF SAID VESSEL TO ITS OPPOSITE SAID, AND INCLINED LOWER PORTIONS WHICH DEFINE A SLOT COMMUNICATING BETWEEN SAID SETTLING COMPARTMENT AND THE LOWER PORTION OF SAID VESSEL, THE ERTIAL WALLS OF SAID SETTLING COMPARTMENT BEING SEPARATED FROM THE VERTICAL WALLS OF SAID VESSEL AND DEFINING A FIRST SPACE THEREBETWEEN,
Claim 7
Dependent Claim
69 words
an inner settling compartment within said vessel and smaller than said vessel defined by vertical walls extending from one side of said vessel to its opposite side, and inclined lower portions which define a slot communicating between said settling compartment and the lower portion of said vessel, the vertical walls of said settling compartment being separated from the vertical walls of said vessel and defining a first space therebetween;
Claim 8
Dependent Claim
69 words
an inner settling compartment within said vessel and smaller than said vessel defined by vertical walls extending from one side of said vessel to its opposite side, and inclined lower portions which define a slot communicating between said settling compartment and the lower portion of said vessel, the vertical walls of said settling compartment being separated from the vertical walls of said vessel and defining a first space therebetween;
Claim 9
Dependent Claim
27 words
The apparatus of claim 1 wherein said exit means comprises a weir over which the clarified water in the upper portion of said settling compartment can flow.
Claim 10
Dependent Claim
68 words
an inner settling compartment within said vessel and defined by a circle smaller than the larger circle forming said vessel, said inner settling compartment having inclined lower portions which define a slot communicating between said settling compartment and the bottom portion of said vessel, the vertical circular wall of said settling compartment being separated from the vertical circular wall of said vessel and defining an annular space therebetween;
Claim 11
Dependent Claim
68 words
an inner settling compartment within said vessel and defined by a circle smaller than the larger circle forming said vessel, said inner settling compartment having inclined lower portions which define a slot communicating between said settling compartment and the bottom portion of said vessel, the vertical circular wall of said settling compartment being separated from the vertical circular wall of said vessel and defining an annular space therebetween;
Claim 12
Dependent Claim
18 words
a plurality of air sparges disposed in the lower portion of said vessel to aerate the wastewater therein;
Claim 13
Dependent Claim
18 words
a plurality of air sparges disposed in the lower portion of said vessel to aerate the wastewater therein;
Claim 14
Dependent Claim
18 words
The apparatus as claimed in claim 1, wherein said slot is a minimum of 6 inches in width.
Claim 15
Dependent Claim
18 words
a plurality of air sparges disposed in the lower portion of said vessel to aerate the wastewater therein;
Claim 16
Dependent Claim
18 words
a plurality of air sparges disposed in the lower portion of said vessel to aerate the wastewater therein;
Claim 17
Dependent Claim
18 words
A PLURALITY OF AIR SPARGES DISPOSED IN THE LWER PORTION OF SAID VESSEL TO AERATE THE WASEWATER THEREIN,
Claim 18
Dependent Claim
18 words
A PLURALITY OF AIR SPARGES DISPOSED IN THE LWER PORTION OF SAID VESSEL TO AERATE THE WASEWATER THEREIN,
Claim 19
Dependent Claim
9 words
MEANS TO FEED SAID WASTWATER INTO SAID FIRST SPACE,
Claim 20
Dependent Claim
9 words
MEANS TO FEED SAID WASTWATER INTO SAID FIRST SPACE,
Claim 21
Dependent Claim
9 words
means to feed said wastewater into said first space;
Claim 22
Dependent Claim
9 words
means to feed said wastewater into said first space;
Claim 23
Independent Claim
11 words
An apparatus for treating and purifying wastewater containing organic pollutants comprising:
Claim 24
Independent Claim
11 words
An apparatus for treating and purifying wastewater containing organic pollutants comprising:
Claim 25
Dependent Claim
9 words
means to feed said wastewater into said annular space;
Claim 26
Dependent Claim
9 words
means to feed said wastewater into said annular space;
Claim 27
Dependent Claim
34 words
a pump means having its suction end disposed near the point of said inverted cone and its discharge end disposed in said annular space above the level of wastewater in said annular space; and
Claim 28
Dependent Claim
34 words
a pump means having its suction end disposed near the point of said inverted cone and its discharge end disposed in said annular space above the level of wastewater in said annular space; and
Claim 29
Dependent Claim
33 words
air-lift pump means having its suction end disposed near the apex of said inverted pyramid and its discharge end disposed in said first space above the level of wastewater in said first space;
Claim 30
Dependent Claim
33 words
air-lift pump means having its suction end disposed near the apex of said inverted pyramid and its discharge end disposed in said first space above the level of wastewater in said first space;
Claim 31
Dependent Claim
33 words
AIR-LIFT PUMP MEANS HAVING ITS SUCTION END DISPOSED NEAR THE APEX OF SAID INVERTED PYRAMID AND ITS DISCHARGE END DISPOSED IN SAID FIRST SPACE ABOVE THE LEEL OF WASTEWATER IN SAID FIRST SPACE,
Claim 32
Dependent Claim
33 words
AIR-LIFT PUMP MEANS HAVING ITS SUCTION END DISPOSED NEAR THE APEX OF SAID INVERTED PYRAMID AND ITS DISCHARGE END DISPOSED IN SAID FIRST SPACE ABOVE THE LEEL OF WASTEWATER IN SAID FIRST SPACE,
Claim 33
Dependent Claim
14 words
MEANS FOR REMOVING THE SLUDGE THAT ACCUMULATES IN THE APEX OF INVERTED PYRAMID, AND
Claim 34
Dependent Claim
14 words
MEANS FOR REMOVING THE SLUDGE THAT ACCUMULATES IN THE APEX OF INVERTED PYRAMID, AND
Claim 35
Dependent Claim
14 words
means for removing the sludge that accumulates in the apex of inverted pyramid; and
Claim 36
Dependent Claim
14 words
means for removing the sludge that accumulates in the apex of inverted pyramid; and
Claim 37
Dependent Claim
73 words
exit means in said vessel within said inner settling compartment; wherein tHe wastewater fed to said annular space descends in said vessel, is aerated in the lower portion thereof and then flows upwardly through said slot and out from said vessel through said exit means, wherein a bed of sludge is established in the lower portion of said settling compartment through which the aerated wastewater must flow upwardly thereby further purifying said wastewater.
Claim 38
Dependent Claim
73 words
exit means in said vessel within said inner settling compartment; wherein tHe wastewater fed to said annular space descends in said vessel, is aerated in the lower portion thereof and then flows upwardly through said slot and out from said vessel through said exit means, wherein a bed of sludge is established in the lower portion of said settling compartment through which the aerated wastewater must flow upwardly thereby further purifying said wastewater.
Claim 39
Dependent Claim
76 words
exit means in one end of said vessel within said inner settling compartment; wherein the wastewater fed to said first space descends in said vessel, is aerated in the lower portion thereof and then flows upwardly through said slot and out from said vessel through said exit means, wherein a bed of sludge is established in the lower portion of said settling compartment through which the aerated wastewater must flow, upwardly thereby further purifying said wastewater.
Claim 40
Dependent Claim
76 words
exit means in one end of said vessel within said inner settling compartment; wherein the wastewater fed to said first space descends in said vessel, is aerated in the lower portion thereof and then flows upwardly through said slot and out from said vessel through said exit means, wherein a bed of sludge is established in the lower portion of said settling compartment through which the aerated wastewater must flow, upwardly thereby further purifying said wastewater.
Claim 41
Dependent Claim
75 words
EXIT MEANS IN ONE END OF SAID VESSEL WITHIN SAID INNER SETTING COMPARTMENT, WHEREIN THE WASTEWATER FED TO SAID FIRST SPACE DESCENDS IN SAID VESSEL,IS AERATED IN THE LOWER PORTION THEREOF AND THEN FLOWS UPWARDLY THROUGH SAID SLOT AND OUT FROM SAID ESSEL THROUGH SAID EXIT MEANS, WHEREN A BED OF SLUDGE IS ESTABLISHED IN THE LOWER PORTION OF SAID SETTING COMPARTMENT THROUGH WHICH THE AERATE WASTEWATER MUST FLOW, UPWARDLY THEREBY FURTHE PUIFYING SAID WASTEWATER
Claim 42
Dependent Claim
75 words
EXIT MEANS IN ONE END OF SAID VESSEL WITHIN SAID INNER SETTING COMPARTMENT, WHEREIN THE WASTEWATER FED TO SAID FIRST SPACE DESCENDS IN SAID VESSEL,IS AERATED IN THE LOWER PORTION THEREOF AND THEN FLOWS UPWARDLY THROUGH SAID SLOT AND OUT FROM SAID ESSEL THROUGH SAID EXIT MEANS, WHEREN A BED OF SLUDGE IS ESTABLISHED IN THE LOWER PORTION OF SAID SETTING COMPARTMENT THROUGH WHICH THE AERATE WASTEWATER MUST FLOW, UPWARDLY THEREBY FURTHE PUIFYING SAID WASTEWATER
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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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |