US3853752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for treating wastes by a combined activated sludge and biological filter bed
Assignee: Individual
•
Filing: 1970-12-02
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Granted: 1974-12-10
•
Expires: 1990-12-02
Abstract
Abstract This invention relates to an improvement in aerobic biological processes for treating waste fluids or sewage.
Inventors
- 👤 J Tymoszczuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:13
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/08; C02F3/085; C02F3/06; C02F3/12; C02F3/1205; C02F3/121; C02F3/26; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
176 words
A PROCESS FOR THE TREATMENT OF SEWAGE AND THE LIKE, SAID PROCESS COMPRISING: MAINTAINING A SUBMERGED BIOLOGICAL FILTER BED ZONE CONTAINING FINELY DIVIDED, PARTICULATE FILTER MEDIA, MAINTAINING AN ACTIVATED SLUDGE ZONE IN UPSTREAM FLUID FLOW RELATIONSHIP TO SAID BIOLOGICAL FILTER BED ZONE; FEEDING SEWAGE OR THE LIKE TO BE TREATED TO SAID ACTIVATED SLUDGE ZONE; AERATING BOTH SAID BIOLIGICAL FILTER BED ZONE AND SAID ACTIVATED SLUDGE ZONE; WITHDRAWING TREATED EFFLUENT FROM SAID BIOLOGICAL FILTER BED ZONE; AND BACKWASHING SAID BIOLOGICAL FILTER BED ZONE AS OFTEN AS REQUIRED TO MAINTAIN THE OPERATING EFFECTIVENESS OF SAID BIOLOGICAL FILTER BED ZONE AND AN ACCEPTABLE HEAD AT THE POINT OF WITHDRAWAL OF THE TREATED EFFLUENT, AN UPPER LAYER OF SAID FILTER MEDIA BEING TRANSPORTED TO A CONDUIT HAVING AN UPPER SAID ACTIVATED SLUDGE ZONE, SAID CONDUIT HAVING UPPER LIMIT END FOR THE TRANSPORTED FILTER MEDIA AND A LOWER OUTLET END THROUGH WHICH SAID TRANSPORT FILTER MEDIA IS RETURNED TO SAID UPPER LAYER OF SAID FILTER MEDIA, THE SAID TRANSPORTED FILTER MEDIA BEING AERATED DURING THE PASSAGE THEREOF THROUGH SAID CONDUIT.
Claim 2
Dependent Claim
176 words
A PROCESS FOR THE TREATMENT OF SEWAGE AND THE LIKE, SAID PROCESS COMPRISING: MAINTAINING A SUBMERGED BIOLOGICAL FILTER BED ZONE CONTAINING FINELY DIVIDED, PARTICULATE FILTER MEDIA, MAINTAINING AN ACTIVATED SLUDGE ZONE IN UPSTREAM FLUID FLOW RELATIONSHIP TO SAID BIOLOGICAL FILTER BED ZONE; FEEDING SEWAGE OR THE LIKE TO BE TREATED TO SAID ACTIVATED SLUDGE ZONE; AERATING BOTH SAID BIOLIGICAL FILTER BED ZONE AND SAID ACTIVATED SLUDGE ZONE; WITHDRAWING TREATED EFFLUENT FROM SAID BIOLOGICAL FILTER BED ZONE; AND BACKWASHING SAID BIOLOGICAL FILTER BED ZONE AS OFTEN AS REQUIRED TO MAINTAIN THE OPERATING EFFECTIVENESS OF SAID BIOLOGICAL FILTER BED ZONE AND AN ACCEPTABLE HEAD AT THE POINT OF WITHDRAWAL OF THE TREATED EFFLUENT, AN UPPER LAYER OF SAID FILTER MEDIA BEING TRANSPORTED TO A CONDUIT HAVING AN UPPER SAID ACTIVATED SLUDGE ZONE, SAID CONDUIT HAVING UPPER LIMIT END FOR THE TRANSPORTED FILTER MEDIA AND A LOWER OUTLET END THROUGH WHICH SAID TRANSPORT FILTER MEDIA IS RETURNED TO SAID UPPER LAYER OF SAID FILTER MEDIA, THE SAID TRANSPORTED FILTER MEDIA BEING AERATED DURING THE PASSAGE THEREOF THROUGH SAID CONDUIT.
Claim 3
Dependent Claim
30 words
The process according to claim 1, wherein the sewage or like is fed to the biological filter bed zone in an upstream fluid flow relationship to the activated sludge zone.
Claim 4
Dependent Claim
29 words
The process according to claim 1, wherein sludge is concentrated in an activated sludge concentrating zone adjacent to and in communication with said activated sludge zone for removal therefrom.
Claim 5
Dependent Claim
28 words
A process as claimed in claim 1, in which the sewage or the like is fed through said filter bed zone and said activated sludge zone under pressure.
Claim 6
Dependent Claim
28 words
A process as claimed in claim 1, in which the sewage or the like is drawn through said filter bed zone and said activated sludge zone under vacuum.
Claim 7
Dependent Claim
28 words
A process as claimed in claim 1, in which at least a portion of the filtering media is circulated to enable said backwashing to be carried out continuously.
Claim 8
Dependent Claim
19 words
A process as claimed in claim 6, in which at least part of the circulating filter media is aerated.
Claim 9
Dependent Claim
22 words
A process as claimed in claim 1, in which air is fed into the bottom portion of the biological filter bed zone.
Claim 10
Dependent Claim
21 words
A process as claimed in claim 1, in which air is fed into the bottom portion of the activated sludge zone.
Claim 11
Dependent Claim
15 words
A process as claimed in claim 1, in which said aerating is carried out intermittently.
Claim 12
Dependent Claim
22 words
A process as claimed in claim 1, in which aeration is carried out with a gas selected from oxygen and oxygen-enriched air.
Claim 13
Dependent Claim
169 words
Apparatus for the treatment of sewage and the like, said apparatus comprising: means for maintaining a submerged biological filter bed zone containing finely divided, particulate filter media; means for maintaining an activated sludge zone in upstream fluid flow relationship to said biological filter bed zone; means for supplying sewage or the like to said activated sludge zone; means for aerating said biological filter bed zone and said activated sludge zone; means for removing treated effluent from said biological filter zone; means for backwashing said biological filter bed; and means for removing backwashings from a point upstream from the said filter bed zone, said apparatus further comprising means for transporting an upper layer of said filter media, a conduit positioned in said activated sludge zone, said conduit having an upper inlet end for the transported filter media and a lower outlet end through which transported filter media is returned to said upper layer of said filter media, and means for aerating said filter media as it passes through Said conduit.
Claim 14
Dependent Claim
169 words
Apparatus for the treatment of sewage and the like, said apparatus comprising: means for maintaining a submerged biological filter bed zone containing finely divided, particulate filter media; means for maintaining an activated sludge zone in upstream fluid flow relationship to said biological filter bed zone; means for supplying sewage or the like to said activated sludge zone; means for aerating said biological filter bed zone and said activated sludge zone; means for removing treated effluent from said biological filter zone; means for backwashing said biological filter bed; and means for removing backwashings from a point upstream from the said filter bed zone, said apparatus further comprising means for transporting an upper layer of said filter media, a conduit positioned in said activated sludge zone, said conduit having an upper inlet end for the transported filter media and a lower outlet end through which transported filter media is returned to said upper layer of said filter media, and means for aerating said filter media as it passes through Said conduit.
Claim 15
Dependent Claim
24 words
An apparatus as claimed in claim 12, that includes an activated sludge concentrator operatively associated with said means for maintaining an activated sludge zone.
Claim 16
Dependent Claim
20 words
An apparatus as claimed in claim 13 that includes means to reduce the amount of foam in said sludge concentrator.
Claim 17
Dependent Claim
24 words
An apparatus as claimed in claim 13, in which the sludge concentrator is open at the bottom to allow a recirculation of the sludge.
Claim 18
Dependent Claim
14 words
An apparatus as claimed in claim 12, including means to circulate said filter media.
Claim 19
Dependent Claim
20 words
An apparatus as claimed in claim 16, in which said means to circulate said filter media is an air lift.
Claim 20
Dependent Claim
19 words
An apparatus as claimed in claim 16, including means to aerate at least part of the circulated filter media.
References Cited (Backward Citations)
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US2364298A
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US2388795A
Cited
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US3220706A
Cited
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |