US4207179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biotreatment using carbon treated recycle and/or clarifier effluent backwash
Assignee: Phillips Petroleum Co
•
Filing: 1977-08-22
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Granted: 1980-06-10
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Expires: 1997-08-22
Abstract
Abstract In a process for biotreating industrial waste water, a portion of the effluent is treated with activated carbon and recycled to the biotreater. This results in a substantial improvement in the biotreater performance. In another embodiment, the biotreatment is an activated sludge process and the clarifier effluent is filtered to stop loss of bacteria and periodically the filter is backwashed to return the bacteria to the system.
Inventors
- 👤 William C. McCarthy
- 👤 Howard W. Goard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:47
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1226; C02F1/00; C02F1/28; C02F1/283; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
159 words
A method comprising: passing industrial waste water containing predominately soluble organic industrial waste to a biochemical treatment zone wherein said industrial waste water is treated in a biological treatment zone by an activated sludge process utilizing aerobic bacteria, passing an effluent from said biological treatment zone to a clarifier zone and recycling sludge from said clarifier to said biological treatment zone; withdrawing a water stream containing some microorganisms from an upper portion of said clarifier zone and passing said water stream to a filtration zone; withdrawing a purified water stream from said filtration zone; passing a portion of said purified water stream into contact with activated carbon and then back to said biochemical treatment zone as dilution water, thereby maintaining biological activity in said biological treatment zone; and discharging the remainder of said purified water stream without activated carbon treatment; wherein the ratio of said industrial waste water to dilution water is within the range of 1:1 to 1:4.
Claim 2
Independent Claim
159 words
A method comprising: passing industrial waste water containing predominately soluble organic industrial waste to a biochemical treatment zone wherein said industrial waste water is treated in a biological treatment zone by an activated sludge process utilizing aerobic bacteria, passing an effluent from said biological treatment zone to a clarifier zone and recycling sludge from said clarifier to said biological treatment zone; withdrawing a water stream containing some microorganisms from an upper portion of said clarifier zone and passing said water stream to a filtration zone; withdrawing a purified water stream from said filtration zone; passing a portion of said purified water stream into contact with activated carbon and then back to said biochemical treatment zone as dilution water, thereby maintaining biological activity in said biological treatment zone; and discharging the remainder of said purified water stream without activated carbon treatment; wherein the ratio of said industrial waste water to dilution water is within the range of 1:1 to 1:4.
Claim 3
Dependent Claim
26 words
A method according to claim 1 wherein said activated carbon is given an exposure within the range of 0.2 to 0.4 grams COD per gram carbon.
Claim 4
Dependent Claim
33 words
A method according to claim 1 wherein said industrial waste water has a COD of greater than 1000 mg/liter, over 50 percent of the material creating said COD being soluble in said water.
Claim 5
Dependent Claim
34 words
A method according to claim 1 wherein said waste water is the effluent from an oxidative dehydrogenation process and wherein greater than 90 percent of the material creating said COD is soluble in water.
Claim 6
Dependent Claim
23 words
A method according to claim 1 wherein a ratio of said industrial waste water:dilution water is within the range of 1:1 to 1:2.
Claim 7
Dependent Claim
39 words
A method according to claim 1 wherein said industrial waste water has a COD of greater than 1,000 and said purified water discharge has a COD of less than 200 grams/liter and a BOD of less than 20 grams/liter.
Claim 8
Dependent Claim
76 words
A method according to claim 1 wherein a ratio of said industrial waste water:dilution water is within the range of 1:1 to 1:2, said carbon is given an exposure of 0.2 to 0.4 gram COD/gram carbon and said contact with said carbon is carried out at a rate of 1 to 10 volumes of purified water per volume of said activated carbon per hour, said activated carbon having a particle size of 12 by 40 mesh.
Claim 9
Independent Claim
132 words
A method comprising: passing industrial waste water to a biochemical treatment, wherein said biochemical treatment involves the use of gram negative bacteria with sludge recycle and said waste water is effluent from an oxidative dehydrogenation process; withdrawing a purified water stream from said biochemical treatment; passing a portion thereof into contact with activated carbon at the rate of 1 to 10 volumes of waste water per volume of said activated carbon per hour, said activated carbon having a particle size of 12 to 40 mesh, and then passing said portion of the purified water stream back to said biochemical treatment as dilution water, the ratio of said industrial waste water:dilution water being within the range of 1:1 to 1:2; and discharging the remainder of said purified water stream without activated carbon treatment.
Claim 10
Independent Claim
132 words
A method comprising: passing industrial waste water to a biochemical treatment, wherein said biochemical treatment involves the use of gram negative bacteria with sludge recycle and said waste water is effluent from an oxidative dehydrogenation process; withdrawing a purified water stream from said biochemical treatment; passing a portion thereof into contact with activated carbon at the rate of 1 to 10 volumes of waste water per volume of said activated carbon per hour, said activated carbon having a particle size of 12 to 40 mesh, and then passing said portion of the purified water stream back to said biochemical treatment as dilution water, the ratio of said industrial waste water:dilution water being within the range of 1:1 to 1:2; and discharging the remainder of said purified water stream without activated carbon treatment.
Claim 11
Dependent Claim
152 words
A process comprising: passing industrial waste water containing predominately soluble organic industrial waste to a biological treatment zone of a biochemical treatment system using activated sludge, passing an effluent from said biological treatment zone to a clarifier zone and recycling sludge from said clarifier to said biological treatment zone; withdrawing a water stream containing some microorganisms from an upper portion of said clarifier zone and passing said water stream to a filtration zone; withdrawing a purified water stream from said filtration zone; periodically backwashing through said filtration zone to return microorganisms from said filtration zone to said activated sludge system; and passing a portion of said purified water stream through an activated carbon filter and returning it to said biological treatment zone as dilution water, thereby maintaining biochemical activity in said biochemical treatment system, the ratio of said industrial waste water to dilution water being within the range of 1:1 to 1:4.
Claim 12
Dependent Claim
152 words
A process comprising: passing industrial waste water containing predominately soluble organic industrial waste to a biological treatment zone of a biochemical treatment system using activated sludge, passing an effluent from said biological treatment zone to a clarifier zone and recycling sludge from said clarifier to said biological treatment zone; withdrawing a water stream containing some microorganisms from an upper portion of said clarifier zone and passing said water stream to a filtration zone; withdrawing a purified water stream from said filtration zone; periodically backwashing through said filtration zone to return microorganisms from said filtration zone to said activated sludge system; and passing a portion of said purified water stream through an activated carbon filter and returning it to said biological treatment zone as dilution water, thereby maintaining biochemical activity in said biochemical treatment system, the ratio of said industrial waste water to dilution water being within the range of 1:1 to 1:4.
Claim 13
Dependent Claim
14 words
A method according to claim 9 wherein said activated sludge process utilizes aerobic bacteria.
Claim 14
Dependent Claim
19 words
A method according to claim 10 wherein said filter media is made up of anthracite coal, sand and garnet.
Claim 15
Dependent Claim
27 words
A method according to claim 9 wherein said filtration zone is made up of a filter media of at least one of anthracite coal, sand and garnet.
Claim 16
Dependent Claim
34 words
A method according to claim 9 wherein said industrial waste water has a COD of greater than 1000 mg/liter, over 50 percent of the material creating said COD being soluble in said waste water.
Claim 17
Dependent Claim
36 words
A method according to claim 9 wherein said waste water is the effluent from an oxidative dehydrogenation process and wherein greater than 90 percent of the material creating said COD is soluble in said waste water.
Claim 18
Dependent Claim
36 words
A method according to claim 9 wherein said biochemical treatment involves the use of gram negative bacteria and said waste water is effluent from an oxidative dehydrogenation process, said process being carried out at ambient temperature.
Claim 19
Dependent Claim
18 words
A method according to claim 9 wherein said backwashing is carried out once every 12 to 36 hours.
Claim 20
Dependent Claim
32 words
A method according to claim 9 wherein said industrial waste water has a COD of greater than 1000 mg/liter and said purified water discharge has a BOD of less than 20 mg/liter.
Claim 21
Dependent Claim
17 words
A method according to claim 9 wherein said filtration zone is backflushed to said biological treatment zone.
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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) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |