US4944886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sewage treatment
Assignee: Individual
•
Filing: 1989-03-20
•
Granted: 1990-07-31
•
Expires: 2009-03-20
Abstract
Abstract A method of sewage treatment is disclosed which consists of the following described steps: Firstly, directing the sewage to be treated into a holding tank; secondly, subjecting the sewage in the holding tank to ultrasonic vibrations in a range between 15 and 150 kilohertz for a period in excess of 12 seconds thereby achieving cavitation of the sewage; thirdly, draining the liquids from the sewage; and fourthly, removing the sewage residue remaining after drainage of liquids.
Inventors
- 👤 Saad A. Masri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:29
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/28; B01D21/283; C; C02; C02F; C02F1/00; C02F1/34; C02F1/36
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
113 words
A method of sewage treatment, comprising the steps of: a. firstly, directing the sewage to be treated into a first tank in which a mechanical rake is rotatably mounted to screen out coarse solids; b. secondly, passing the sewage into a second tank and subjecting the sewage in said second tank to ultrasonic vibrations in a range between 15 and 150 kilohertz for a period in excess of 12 seconds through use of a plurality of ultrasonic probes mounted on one or more arms which rotate in the second tank thereby achieving cavitation of the sewage; c. thirdly, draining liquids from the sewage; d. fourthly, removing sewage residue remaining after drainage of liquids.
Claim 2
Independent Claim
113 words
A method of sewage treatment, comprising the steps of: a. firstly, directing the sewage to be treated into a first tank in which a mechanical rake is rotatably mounted to screen out coarse solids; b. secondly, passing the sewage into a second tank and subjecting the sewage in said second tank to ultrasonic vibrations in a range between 15 and 150 kilohertz for a period in excess of 12 seconds through use of a plurality of ultrasonic probes mounted on one or more arms which rotate in the second tank thereby achieving cavitation of the sewage; c. thirdly, draining liquids from the sewage; d. fourthly, removing sewage residue remaining after drainage of liquids.
Claim 3
Dependent Claim
31 words
A method as defined in claim 1, wherein the sewage is subjected to ultrasonic vibrations for a further period of approximately 3 hours such that a degassing of the sewage occurs.
Claim 4
Dependent Claim
31 words
A method as defined in claim 1, including a further step of letting the sewage stand to permit sedimentation and the formation of the sewage residue prior to drainage of liquids.
Claim 5
Dependent Claim
22 words
A method as defined in claim 1, including a further step of passing the liquids through a series of filters after drainage.
Claim 6
Dependent Claim
21 words
A method as defined in claim 1, including a further step of dehydrating the sewage residue remaining after drainage of liquids.
Claim 7
Dependent Claim
22 words
A method as claimed in claim 1, the second tank being generally oval in shape thereby enhancing the reflection of ultrasonic vibrating.
Claim 8
Independent Claim
162 words
A method of sewage treatment, comprising the steps of: a. firstly, passing the sewage into a first tank having a rotatably mounted mechanical rake to screen out coarse solids; b. secondly, passing the sewage into a second tank having a plurality of ultrasonic probes mounted on rotating arms such that each of the probes extends into and subjects the sewage to ultrasonic vibrations in a range of between 15 kilohertz and 150 kilohertz for a period of approximately 3 hours such that cavitation and degassing of the sewage occurs; c. thirdly, letting the sewage stand in the second tank for a period of between 6 and 24 hours to permit sedimentation and the forming of sewage sediment residue; d. fourthly, draining liquids from the sewage in the second tank and passing the liquids through a series of filters formed of an organic material; and e. fifthly, dehydrating and removing the sewage sediment residue remaining in the second tank after drainage of liquids.
Claim 9
Independent Claim
162 words
A method of sewage treatment, comprising the steps of: a. firstly, passing the sewage into a first tank having a rotatably mounted mechanical rake to screen out coarse solids; b. secondly, passing the sewage into a second tank having a plurality of ultrasonic probes mounted on rotating arms such that each of the probes extends into and subjects the sewage to ultrasonic vibrations in a range of between 15 kilohertz and 150 kilohertz for a period of approximately 3 hours such that cavitation and degassing of the sewage occurs; c. thirdly, letting the sewage stand in the second tank for a period of between 6 and 24 hours to permit sedimentation and the forming of sewage sediment residue; d. fourthly, draining liquids from the sewage in the second tank and passing the liquids through a series of filters formed of an organic material; and e. fifthly, dehydrating and removing the sewage sediment residue remaining in the second tank after drainage of liquids.
References Cited (Backward Citations)
CA809080A
Cited
US3264213A
Cited
US3537655A
Cited
US3630377A
Cited
US3906679A
Cited
US4211744A
Cited
US4340488A
Cited
US4308229A
Cited
US4358204A
Cited
US4462909A
Cited
US4517159A
Cited
US4596658A
Cited
US4483695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |