US3598236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for purifying sewage water by means of floculation and aeration
Assignee: Xylem Water Solutions AB
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Filing: 1969-02-18
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Granted: 1971-08-10
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Expires: 1989-02-18
Abstract
Abstract A system for purifying sewage water by flocculation and aeration using a buffer chamber, a flocculating chamber, a sedimentation and sludge concentration chamber and a regenerating and sludge activating chamber. The system uses activated sludge as a flocculating agent. The system further comprises a mammoth pump between the buffer and flocculating chambers and another between sedimentation and regenerating chambers. A tiltable bucket regulates the sludge feed to the regenerating chamber permitting a part of the fluid flow to pass by the side. The bucket by means of a valve, further controls a driving air supply to another mammoth pump, the transmitted quantity of activated sludge to the regenerating chamber being thus adjusted to match the quantity of sewage water measured by the bucket.
Inventors
- 👤 Nils-Olof Nordlander
- 👤 Sixten Englesson
- 👤 Sven Gustaf Yngve Gamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:24
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1242; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
22 words
The system of claim 1 wherein said sensing means comprises a tiltable bucket and said control means further controls said first pump.
Claim 2
Dependent Claim
39 words
The system of claim 1 further comprising a fluid flow sensing means connected to the outlet of said first pump for decreasing the proportion of fluid supplied to said sensing means when the quantity of incoming sewage water increases.
Claim 3
Dependent Claim
53 words
The system of claim 3 wherein said fluid flow sensing means comprises a spring suspended gutter with a skiboard and an inclined supporting surface for said gutter whereby an increased quantity of sewage water will cause said gutter to swing sideways down said incline thereby diverting the fluid flowing from said detecting means.
Claim 4
Dependent Claim
24 words
The system of claim 1 wherein said means for transferring said activated sludge from said regeneration chamber to said flocculating chamber comprises a spillway.
Claim 5
Dependent Claim
38 words
The system of claim 5 wherein said spillway of said sedimentation chamber is connected to said buffer chamber, said buffer chamber further comprising a spillway the level of which is lower than the spillway of said sedimentation chamber.
Claim 6
Dependent Claim
40 words
The system of claim 1 wherein said buffer chamber includes an outlet comprising a pipe with an elbow at its end whereby the edge of the end forms an inclined circular opening in relation to the axis of said pipe.
Claim 7
Dependent Claim
26 words
The system of claim 7 further comprising collar means surrounding the end of said pipe for protecting against the penetration of oil into said buffer chamber.
Claim 8
Dependent Claim
101 words
The system of claim 1 further comprising a. a third pump in said sedimEntation chamber wherein the pump is set at a level such that it only pumps purified water from said sedimentation chamber; b. level sensing means located in said buffer chamber for producing an output when the sewage water level in said buffer chamber is lower than a predetermined value; control means connected to said level sensing means for controlling the operation of said third pump whereby when said sewage water drops below said predetermined level said third pump pumps water from said water phase into said buffer chamber.
Claim 9
Dependent Claim
34 words
The system of claim 9 wherein said control means further comprises means for stopping said third pump after a predetermined time or when the level in said buffer chamber reaches a second predetermined level.
Claim 10
Dependent Claim
41 words
The system of claim 10 wherein said sedimentation chamber further includes an aeration means covering the bottom of said sedimentation chamber wherein said aeration means starts to aerate when the level of said buffer chamber is lower than a predetermined value.
References Cited (Backward Citations)
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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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |