US3788476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment system
Assignee: Individual
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Filing: 1971-09-23
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Granted: 1974-01-29
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Expires: 1991-09-23
Abstract
Abstract A system is described for removing pollutants of waste waters, including domestic and other sewage, by simultaneous oxidation of organic wastes, both soluble and insoluble, and by sedimentation of insoluble particles causing turbidity. This is essentially a conventional solids-liquid contactor clarifier with some additions to provide means for: (a) addition of air or purer oxygen to sewage waters; (b) pressurizing the sewage water up to 10 atmospheres to increase solubility and concentration of oxygen-hence velocity of chemical and/or aerobic reaction; (c) withdrawing and depressurizing the sewage water to atmospheric pressure to allow most of dissolved gases to be released and to be discharged because of lower solubility for gases at atmospheric pressure; (d) recycling the sewage water for from 2 to 50 times through this pressurizing-depressurizing cycle; and, when used aboard ship, (e) means for installation in the ship''s hold to minimize effects of the ship''s movements on the sedimentation operation. It is particularly useful for smaller installations, for use on ships, and other places where waste from not more than several thousand people is to be handled. It also may be used as a sedimentation system alone wherein insoluble solids are settled out to give a clear effluent. The sludge solids produced in an earlier sedimentation, either with or without oxidation, may be oxidized and sedimented in a separate step in the equipment.
Inventors
- 👤 D Othmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:00
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1236; C02F3/1242; C02F1/00; C02F1/72; C02F11/00; C02F11/06; C02F11/08; C02F2201/00; C02F2201/001; C02F2301/00; C02F2301/06; C02F2301/066; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y02W10/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
205 words
A solids-liquid contact clarifier for removing pollutants from waste water comprising, in combination: a. an enclosed clarification vessel capable of operating under a super-atmospheric pressure; b. waste water inlet means connected to said vessel; c. pump means connected to said waste water inlet means; d. inlet means for oxygen containing gas, connecting with said waste water inlet means prior to said pump connection, for increasing the concentration of oxygen in said waste water; e. means in the upper part of said vessel for withdrawing water containing a lesser amount of said pollutants than is contained in said original waste water; f. means connected to said withdrawing means for depressurizing said withdrawn water to decrease the amount of gas dissolved in said water, and to release gas; g. means connected to said depressurizing means for venting said released gas; and h. means for returning at least a part of said withdrawn water containing a lesser amount of said pollutants, to said vessel, including inlet means for oxygen containing gas and means for pressurizing back to super-atmospheric pressure both said withdrawn water and said gas, whereby said withdrawn water containing a lesser amount of said pollutants and an additional supply of oxygen is recycled through said clariFier.
Claim 2
Dependent Claim
205 words
A solids-liquid contact clarifier for removing pollutants from waste water comprising, in combination: a. an enclosed clarification vessel capable of operating under a super-atmospheric pressure; b. waste water inlet means connected to said vessel; c. pump means connected to said waste water inlet means; d. inlet means for oxygen containing gas, connecting with said waste water inlet means prior to said pump connection, for increasing the concentration of oxygen in said waste water; e. means in the upper part of said vessel for withdrawing water containing a lesser amount of said pollutants than is contained in said original waste water; f. means connected to said withdrawing means for depressurizing said withdrawn water to decrease the amount of gas dissolved in said water, and to release gas; g. means connected to said depressurizing means for venting said released gas; and h. means for returning at least a part of said withdrawn water containing a lesser amount of said pollutants, to said vessel, including inlet means for oxygen containing gas and means for pressurizing back to super-atmospheric pressure both said withdrawn water and said gas, whereby said withdrawn water containing a lesser amount of said pollutants and an additional supply of oxygen is recycled through said clariFier.
Claim 3
Dependent Claim
61 words
The clarifier of claim 1, wherein said inlet means for oxygen containing gas is connected with said waste water inlet at the suction of said pump means, whereby mixing of said gas with said waste water in said pump means dissolves more oxygen at said super-atmospheric pressure of said vessel than could be dissolved in said waste water at atmospheric pressure.
Claim 4
Dependent Claim
44 words
The system of claim 1 in combination with means provided for recovering some part of the mechanical energy released in said withdrawal of said water containing a lesser amount of pollutants, said energy recovery means connected to said means for depressurizing said withdrawn water.
Claim 5
Dependent Claim
221 words
A solids-liquid contact clarifier, for removing pollutants from waste water, in combination with a ship and comprising, in combination: a. an enclosed clarification vessel capable of operating under a super-atmospheric pressure; b. waste water inlet means connected to said vessel; c. pump means connected to said waste water inlet means; d. inlet means for oxygen containing gas, connecting with said waste water inlet means prior to said pump connection, for increasing the concentration of oxygen in said waste water; e. means in the upper part of said vessel for withdrawing water containing a lesser amount of said pollutants than is contained in said original waste water; f. means connected to said withdrawing means for drpressurizing said withdrawn water to decrease the amount of gas dissolved in said water, and to release gas; g. means connected to said depressurizing means for venting said released gas; h. means for returning at least a part of said withdrawn water containing a lesser amount of said pollutants to said vessel, including inlet means for oxygen containing gas and means for pressurizing back to super-atmospheric pressure both said withdrawn water and said gas, whereby said withdrawn water containing a lesser amount of said pollutants and an additional supply of oxygen is recycled through said clarifier; and i. means for support of said clarifier in said ship.
Claim 6
Dependent Claim
221 words
A solids-liquid contact clarifier, for removing pollutants from waste water, in combination with a ship and comprising, in combination: a. an enclosed clarification vessel capable of operating under a super-atmospheric pressure; b. waste water inlet means connected to said vessel; c. pump means connected to said waste water inlet means; d. inlet means for oxygen containing gas, connecting with said waste water inlet means prior to said pump connection, for increasing the concentration of oxygen in said waste water; e. means in the upper part of said vessel for withdrawing water containing a lesser amount of said pollutants than is contained in said original waste water; f. means connected to said withdrawing means for drpressurizing said withdrawn water to decrease the amount of gas dissolved in said water, and to release gas; g. means connected to said depressurizing means for venting said released gas; h. means for returning at least a part of said withdrawn water containing a lesser amount of said pollutants to said vessel, including inlet means for oxygen containing gas and means for pressurizing back to super-atmospheric pressure both said withdrawn water and said gas, whereby said withdrawn water containing a lesser amount of said pollutants and an additional supply of oxygen is recycled through said clarifier; and i. means for support of said clarifier in said ship.
Claim 7
Dependent Claim
51 words
The clarifier of claim 4 in combination with means provided in the lower part of said vessel for withdrawing some part of said pollutants as sludge solids, and means connected from said sludge withdrawal means to said pump means, whereby at least part of said sludge is recycled through said clarifier.
Claim 8
Dependent Claim
34 words
The clarifier in combination with a ship, of claim 4, wherein the vertical axis of said clarifier is located near a line drawn between the center of buoyancy and the meta-center of said ship.
Claim 9
Dependent Claim
32 words
The clarifier in combination with a ship, of claim 4, wherein the vertical axis of said clarifier is located near the central vertical plane of said ship extending from stem to stern.
Claim 10
Dependent Claim
41 words
The clarifier in combination with a ship, of claim 4, wherein said clarifier is supported from the structural frame of said ship by a pendulous suspension means, to compensate automatically for the motions due to roll and pitch of said ship.
Claim 11
Dependent Claim
41 words
The clarifier in combination with a ship, of claim 4, wherein said clarifier is supported from the structural frame of said ship by a gimbaled suspension means to compensate automatically for the motions due to roll and pitch of said ship.
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |