US4269709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste water treatment system with aeration and circulation means
Assignee: Individual
•
Filing: 1979-08-06
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Granted: 1981-05-26
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Expires: 1999-08-06
Abstract
Abstract A flowing liquid system in which means are provided for simultaneously aerating and circulating said liquid comprising surface aerator means cooperating with partition means extending into a communication section between a first channel and a second channel with the aerator means located on the second channel side of and separated from the partition means and closer to the partition means than to the outside of the communication section, said system being particularly suited for use in an activated sludge waste water treatment system.
Inventors
- 👤 Paul I. Rongved
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:00
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1257; C02F3/14; C02F3/16; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/926
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
177 words
In a horizontally disposed flowing liquid system in which the liquid changes flow direction from a first channel through a communication section into a second channel, means for simultaneously aerating and circulating said liquid comprising substantially vertical partition means cooperating with surface aerator means, said partition means extending from the inside wall of said first channel into said communication section and said surface aerator means rotating about a substantially vertical axis on the second channel side of said partition means, said axis of said surface aerator means being separated from said partition means at the closest point by a distance corresponding to about 11/2 to 2 radii of said surface aerator means and an outer edge of said partition means extending past said closest point no more than a distance corresponding to about 1 said radius, said axis being separated from the closest point of the outside wall of said communication section by a distance corresponding to more than 2 said radii, whereby said aerator means is closer to said partition means than to said outside wall.
Claim 2
Dependent Claim
177 words
In a horizontally disposed flowing liquid system in which the liquid changes flow direction from a first channel through a communication section into a second channel, means for simultaneously aerating and circulating said liquid comprising substantially vertical partition means cooperating with surface aerator means, said partition means extending from the inside wall of said first channel into said communication section and said surface aerator means rotating about a substantially vertical axis on the second channel side of said partition means, said axis of said surface aerator means being separated from said partition means at the closest point by a distance corresponding to about 11/2 to 2 radii of said surface aerator means and an outer edge of said partition means extending past said closest point no more than a distance corresponding to about 1 said radius, said axis being separated from the closest point of the outside wall of said communication section by a distance corresponding to more than 2 said radii, whereby said aerator means is closer to said partition means than to said outside wall.
Claim 3
Dependent Claim
49 words
A system as defined in claim 1 wherein said liquid is waste waster to be treated and wherein said first channel, said second channel, and said communication section comprise a reservoir for said waste water, said reservoir being provided with waste water inlet means and treated liquid outlet means.
Claim 4
Dependent Claim
60 words
A system as defined in claim 2 which is an activated sludge continuous waste water treatment system and wherein said treated liquid outlet means is connected to clarifying means which removes at least some of the sludge carried by the treated liquid and sludge return means is provided to return at least some of the removed sludge to said reservoir.
Claim 5
Dependent Claim
18 words
A system as defined in claim 3 wherein said reservoir provides a single, closed, continuous, substantially horizontal path.
Claim 6
Dependent Claim
46 words
A system as defined in claim 3 wherein said waste water inlet means is loaded in said reservoir such that the distance between said inlet means and said surface aerator means in the flow direction is at least 10% of the distance completely around said reservoir.
Claim 7
Dependent Claim
35 words
A system as defined in claim 1 wherein said partition means extends at an angle in the direction of the outer wall of said first channel whereby the flow of said liquid is deflected laterally.
Claim 8
Dependent Claim
14 words
A system as defined in claim 6 wherein said partition means is substantially uniplanar.
Claim 9
Dependent Claim
42 words
A system as defined in claim 7 wherein said partition means comprises a separation wall provided with an opening therein permitting passage of said liquid from said first channel into said communication section only below the level of said surface aerator means.
Claim 10
Dependent Claim
13 words
A system as defined in claim 6 wherein said partition means is arcuate.
Claim 11
Dependent Claim
30 words
A system as defined in claim 9 wherein said partition means curves first in the direction of said outer wall and then curves in the direction of said inner wall.
Claim 12
Dependent Claim
20 words
A system as defined in claim 6 wherein said partition means comprises segments lying in at least two different planes.
Claim 13
Dependent Claim
44 words
A system as defined in claim 1 wherein said surface aerator means comprises aerator impeller means mounted perpendicularly on rotatable shaft means, said shaft means being coaxial with said axis and tilted so that the plane in which said impeller means rotated is non-horizontal.
Claim 14
Dependent Claim
28 words
A system as defined in claim 12 wherein said plane slops up and away from said partition means at an angle of up to 10° from the horizontal.
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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) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |