Patent US3061843A successfully refreshed from Google Patents.
US3968034A
Expired / Lapsed
US
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Process and apparatus for treating wastes by a combined activated sludge and biological filter bed
Assignee: Individual
•
Filing: 1974-10-15
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Granted: 1976-07-06
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Expires: 1994-10-15
Abstract
Abstract This invention relates to aerobic biological processes for treating waste waters or sewage and an apparatus for carrying out the process.
Inventors
- 👤 Jerzy Tymoszczuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:19
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: 36
Claim 1
Independent Claim
152 words
A process for the treatment of wastes such as sewage and waste liquid, said process comprising: maintaining a submerged aerated biological filter bed zone containing finely divided particulate filtering media which is circulated in said zone; maintaining an aerated activated sludge zone in upstream fluid zone, feeding waste to be treated to said activated sludge zone; recycling said waste from said activated sludge zone through said biological filter bed back to said activated sludge zone; maintaining a biological stable filter bed zone in downstream fluid flow relationship to said aerated biological filter bed zone and said activated sludge zone so that the waste passes thereto; draining treated waste from said biological stable filter bed zone; and backwashing said biological stable filter bed zone as often as required to maintain the operating effectiveness of said biological stable filter bed zone and an acceptable headloss at the point of withdrawal of the treated effluent.
Claim 2
Dependent Claim
152 words
A process for the treatment of wastes such as sewage and waste liquid, said process comprising: maintaining a submerged aerated biological filter bed zone containing finely divided particulate filtering media which is circulated in said zone; maintaining an aerated activated sludge zone in upstream fluid zone, feeding waste to be treated to said activated sludge zone; recycling said waste from said activated sludge zone through said biological filter bed back to said activated sludge zone; maintaining a biological stable filter bed zone in downstream fluid flow relationship to said aerated biological filter bed zone and said activated sludge zone so that the waste passes thereto; draining treated waste from said biological stable filter bed zone; and backwashing said biological stable filter bed zone as often as required to maintain the operating effectiveness of said biological stable filter bed zone and an acceptable headloss at the point of withdrawal of the treated effluent.
Claim 3
Dependent Claim
18 words
The process according to claim 1 wherein the waste is fed to the aerated biological filter bed zone.
Claim 4
Dependent Claim
33 words
The process according to claim 1, wherein sludge in excess of that required in the process is collected in a sludge concentrator zone adjacent to and in communication with the activated sludge zone.
Claim 5
Dependent Claim
37 words
A process as claimed in claim 1 in which the biological stable filter bed is made of a plurality of layers, the particles in each layer being different in size from the particles in a neighbouring layer.
Claim 6
Dependent Claim
32 words
A process as claimed in claim 1 in which there are a plurality of aerated biological filter bed and biological stable filter bed zones, each zone being spaced from its neighbouring zone.
Claim 7
Dependent Claim
18 words
A process as claimed in claim 1 in which the waste is fed through said process under pressure.
Claim 8
Dependent Claim
18 words
A process as claimed in claim 1 in which the waste is drawn through said process under vacuum.
Claim 9
Dependent Claim
34 words
A process as claimed in claim 1 in which aeration of said aerated biological filter bed zone is carried out by feeding air into the bottom part of said aerated biological filter bed zone.
Claim 10
Dependent Claim
29 words
A process as claimed in claim 1 in which aeration of said biological filter bed zone is carried out by air-lifts placed in said aerated biological filter bed zone.
Claim 11
Dependent Claim
27 words
A process as claimed in claim 1 in which aeration of said activated sludge zone is carried out by submerged aerators placed in the activated sludge zone.
Claim 12
Dependent Claim
41 words
A method as claimed in claim 1 in which said backwashing is carried out by first draining the liquid from the activated sludge zone and then backwashing the filter media with air and sufficient water to refill the activated sludge zone.
Claim 13
Dependent Claim
19 words
A process as claimed in claim 1 in which aeration is carried out with a compressed gas utilizing oxygen.
Claim 14
Dependent Claim
21 words
A process as claimed in claim 1 in which aeration of said aerated biological filter bed zone in carried out intermittently.
Claim 15
Dependent Claim
21 words
A process as claimed in claim 1 in which the biological stable filter bed zone is replaced by a settling zone.
Claim 16
Dependent Claim
30 words
The process claimed in claim 1 wherein aeration of said activated sludge zone and said aerated biological filter bed zone is carried out with a compressed gas utilizing oxygen-enriched air.
Claim 17
Independent Claim
144 words
An apparatus for the treatment of wastes such as sewage and waste liquid, said apparatus comprising: a submerged aerated biological filter bed zone containing finely divided particulate filtering media; means for continuously circulating the particulate filtering media in said aerated biological filter bed zone; an aerated activated sludge zone located in upstream fluid flow relationship to said aerated filter bed zone; means for supplying waste to be treated to said activated sludge zone; means for recycling waste from activated sludge zone through said aerated filter bed back to activated sludge zone; a biological stable filter bed zone located in downstream fluid flow relationship to said aerated biological filter bed zone and said activated sludge zone; means for removing treated effluent from said biological stable filter bed zone; means for backwashing said biological filter bed zone as often as required and means for removing backwashings.
Claim 18
Independent Claim
144 words
An apparatus for the treatment of wastes such as sewage and waste liquid, said apparatus comprising: a submerged aerated biological filter bed zone containing finely divided particulate filtering media; means for continuously circulating the particulate filtering media in said aerated biological filter bed zone; an aerated activated sludge zone located in upstream fluid flow relationship to said aerated filter bed zone; means for supplying waste to be treated to said activated sludge zone; means for recycling waste from activated sludge zone through said aerated filter bed back to activated sludge zone; a biological stable filter bed zone located in downstream fluid flow relationship to said aerated biological filter bed zone and said activated sludge zone; means for removing treated effluent from said biological stable filter bed zone; means for backwashing said biological filter bed zone as often as required and means for removing backwashings.
Claim 19
Dependent Claim
20 words
An apparatus as claimed in claim 15 that includes an excess sludge concentrator operatively associated with said activated sludge zone.
Claim 20
Dependent Claim
23 words
An apparatus as claimed in claim 17 in which the sludge concentrator is open at the bottom to allow recirculation of the sludge.
Claim 21
Dependent Claim
27 words
An apparatus as claimed in claim 15 in which the media within said aerated filter bed zone is circulated by upwards flow of sewage or the like.
Claim 22
Dependent Claim
21 words
An apparatus as claimed in claim 15 in which the media within said aerated filter bed zone is circulated by air-lifts.
Claim 23
Dependent Claim
25 words
An apparatus as claimed in claim 20 in which the upper part of each air-lift is rotated by the force of emission of the air.
Claim 24
Dependent Claim
22 words
An apparatus as claimed in claim 20 in which a separate waste water supply is connected to the bottom of each air-lift.
Claim 25
Dependent Claim
23 words
An apparatus as claimed in claim 20 in which each air-lift has a conic baffle positioned below its outlet to direct filtering media.
Claim 26
Dependent Claim
20 words
An apparatus as claimed in claim 20 in which there is a defelector plate over the top of each air-lift.
Claim 27
Dependent Claim
28 words
An apparatus as claimed in claim 15 in which said means for backwashing is a set of air-lifts placed in bottom of said biological stable filter bed zone.
Claim 28
Dependent Claim
25 words
An apparatus as claimed in claim 16 in which the means for supplying waste is positioned to feed waste to the aerated filter bed zone.
Claim 29
Dependent Claim
21 words
An apparatus as claimed in claim 15 that includes means to reduce the amount of foam in said activated sludge zone.
Claim 30
Dependent Claim
26 words
An apparatus as claimed in claim 16 which said circulating means comprises means for introducing compressed air into the bottom of said aerated filter bed zone.
Claim 31
Dependent Claim
15 words
An apparatus as claimed in claim 15 in which said circulating means comprises an air-lift.
Claim 32
Dependent Claim
21 words
An apparatus as claimed in claim 15, in which said means to circulate said sewage and the like is a pump.
Claim 33
Dependent Claim
15 words
An apparatus as claimed in claim 15 in which said circulating means comprises an aerator.
Claim 34
Dependent Claim
23 words
An apparatus as claimed in claim 15 in which the aerated filter bed zone is divided into separate compartments by a permeable wall.
Claim 35
Dependent Claim
27 words
An apparatus as claimed in claim 16 in which the aerated filter bed zone is separated from the biological stable filter bed zone by a waste-permeable wall.
Claim 36
Dependent Claim
27 words
An apparatus as claimed in claim 16 in which said means for removing treated effluent comprises inverted "V"-shaped baffles placed within the biological stable filter bed media.
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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) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |