US5227051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for processing organic waste liquid
Assignee: ZAIDAN HOJIN NANYO KYOKAI A CORP OF JAPAN
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Filing: 1991-02-01
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Granted: 1993-07-13
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Expires: 2011-02-01
Abstract
Abstract Waste liquid is cleaned or purified primarily by removing organic contaminants therefrom by combination of a floating filter layer and an anaerobic biological process. The floating filter layer consists of irregularly shaped small pieces of lipophilic substances such as polypropylene and other plastics, and the organic contaminants are on the one hand filtered by this floating filter layer, and on the other hand decomposed on the surface of the small pieces forming the floating filter layer through anaerobic biological process. The system of the present invention is economical to build, and can be used as a part of sewage and waste liquid processing installations either for industrial or for household use.
Inventors
- 👤 Katsutoshi Oshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:58
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; C02F3/2806; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0202; B01D17/08; C02F3/02; C02F3/06; C02F3/10; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
218 words
A biological system for processing organic waste liquid, comprising: a vessel having a sidewall and which vessel is substantially enclosed to define an inner chamber substantially free from external air supply and in which an anaerobic biological process is intended to take place, said vessel provided with an inlet and an outlet for inflow and outflow of waste liquid into and out of said vessel, respectively; aqueous liquid waste in the vessel; a floating filter layer in the aqueous liquid separating the interior of said vessel into two parts communicating with said inlet and said outlet, respectively, said floating layer being substantially horizontal and extending to the interior of the sidewall, said floating filter layer consisting of irregularly shaped pieces, particles or flakes of material having a true or apparent specific gravity substantially equal to or less than that of said waste liquid; bacteria in the floating layer; and grid means adjacent the filter layer for keeping said floating filter layer substantially submerged below a surface level of said waste liquid in said vessel, the grid means being substantially horizontal and extending to the interior of the sidewall; a flow rate of said waste liquid passing through said vessel being so determined as to allow said waste liquid to stay in said vessel at least for one hour.
Claim 2
Dependent Claim
218 words
A biological system for processing organic waste liquid, comprising: a vessel having a sidewall and which vessel is substantially enclosed to define an inner chamber substantially free from external air supply and in which an anaerobic biological process is intended to take place, said vessel provided with an inlet and an outlet for inflow and outflow of waste liquid into and out of said vessel, respectively; aqueous liquid waste in the vessel; a floating filter layer in the aqueous liquid separating the interior of said vessel into two parts communicating with said inlet and said outlet, respectively, said floating layer being substantially horizontal and extending to the interior of the sidewall, said floating filter layer consisting of irregularly shaped pieces, particles or flakes of material having a true or apparent specific gravity substantially equal to or less than that of said waste liquid; bacteria in the floating layer; and grid means adjacent the filter layer for keeping said floating filter layer substantially submerged below a surface level of said waste liquid in said vessel, the grid means being substantially horizontal and extending to the interior of the sidewall; a flow rate of said waste liquid passing through said vessel being so determined as to allow said waste liquid to stay in said vessel at least for one hour.
Claim 3
Dependent Claim
35 words
A system according to claim 1, including means for controlling the flow rate of said waste liquid passed through said vessel so that said waste liquid stays in said vessel at least for three hours.
Claim 4
Dependent Claim
40 words
A system according to claim 1, wherein said floating filter layer separates said internal chamber into upper and lower chambers, and said inlet is provided above said floating filter layer while said outlet is provided below said floating filter layer.
Claim 5
Dependent Claim
29 words
A system according to claim 3, wherein said vessel is provided with an outlet in an uppermost part of said vessel for expelling gaseous substances out of said vessel.
Claim 6
Dependent Claim
36 words
A system according to claim 3, wherein said vessel is provided with an outlet in an uppermost part of said vessel for removing liquid substances which are collected in an upper part of said internal chamber.
Claim 7
Dependent Claim
36 words
A system according to claim 3, wherein said vessel is provided with an outlet in a lowermost part of said vessel for removing heavier substances which are collected in a lower part of said internal chamber.
Claim 8
Dependent Claim
51 words
A system according to claim 3, wherein said vessel is provided with a vertically disposed cylindrical shape, and an inflow of said liquid waste from said inlet defines a certain angle with respect to a radial line as seen on a horizontal plane of projection and/or a vertical plane of projection.
Claim 9
Dependent Claim
22 words
A system according to claim 3, further comprising a second vessel for carrying out an aerobic biological process connected to said outlet.
Claim 10
Dependent Claim
27 words
A system according to claim 8, wherein said second vessel is provided with means for introducing air or oxygen thereinto for aeration of waste liquid received therein.
Claim 11
Dependent Claim
18 words
A system according to claim 8, wherein said second vessel is also provided with a floating filter layer.
Claim 12
Dependent Claim
40 words
A system according to claim 1, wherein said floating filter layer separates said internal chamber into upper and lower chambers, and said inlet is provided below said floating filter layer while said outlet is provided above said floating filter layer.
Claim 13
Dependent Claim
46 words
A system according to claim 11, wherein said inlet provided below said floating filter layer for introducing waste liquid into said inner chamber defines a certain angle with respect to a horizontal plane to stir heavy substances settling in a lower part of said inner chamber.
Claim 14
Dependent Claim
29 words
A system according to claim 11, wherein said vessel is provided with an outlet in an uppermost part of said vessel for expelling gaseous substances out of said vessel.
Claim 15
Dependent Claim
36 words
A system according to claim 11, wherein said vessel is provided with an outlet in an uppermost part of said vessel for removing liquid substances which are collected in an upper part of said internal chamber.
Claim 16
Dependent Claim
36 words
A system according to claim 11, wherein said vessel is provided with an outlet in a lowermost part of said vessel for removing heavier substances which are collected in a lower part of said internal chamber.
Claim 17
Dependent Claim
51 words
A system according to claim 11, wherein said vessel is provided with a vertically disposed cylindrical shape, and an inflow of said liquid waste from said inlet defines a certain angle with respect to a radial line as seen on a horizontal plane of projection and/or a vertical plane of projection.
Claim 18
Dependent Claim
51 words
A system according to claim 1, wherein said floating filter layer fills up said inner chamber up to an uppermost part thereof, and said means for keeping said floating filter layer within a prescribed part of said inner chamber prevents said floating filter layer from flowing out of said inner chamber.
Claim 19
Dependent Claim
22 words
A system according to claim 1, further comprising a second vessel for carrying out an aerobic biological process connected to said outlet.
Claim 20
Dependent Claim
27 words
A system according to claim 18, wherein said second vessel is provided with means for introducing air or oxygen thereinto for aeration of waste liquid received therein.
Claim 21
Dependent Claim
18 words
A system according to claim 18, wherein said second vessel is also provided with a floating filter layer.
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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) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |