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US4277343A
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US
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Method for continuously monitoring and controlling alkalinity for environmental purposes using a pCO2 probe
Assignee: Individual
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Filing: 1979-09-07
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Granted: 1981-07-07
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Expires: 1999-09-07
Abstract
Abstract A novel method for continuously monitoring and controlling the total alkalinity attributable to carbon dioxide, bicarbonate ion and carbonate ion such as is found in water and waste water treatment systems and in cooling towers. This method includes the steps of sampling the aqueous solution, adjusting the pH of the sample, detecting with a pCO 2 probe the total carbon dioxide of the sample, and adding an alkalinity-controlling chemical to the aqueous solution. Also provided is a method for continuously monitoring this total alkalinity in a natural body of water.
Inventors
- 👤 Jacob D. Paz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:33
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/008; G; G01; G01N; G01N33/00; G01N33/18; G01N33/182; C02F1/52; C02F1/5236; C02F1/72; C02F1/76; C02F2101/00; C02F2101/10; C02F2101/105; C02F2101/16; C02F2103/00; C02F2103/02; C02F2103/023; C02F2209/00; C02F2209/07; C02F5/00; C02F5/02; C02F5/06; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903; Y10S210/906; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/034
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
126 words
A method for continuously monitoring and controlling the total alkalinity attributable to carbon dioxide, bicarbonate ion and carbonate ion in an aqueous solution in which it is desirable to maintain alkalinity near a value customary for drinking water for environmental purposes, said method comprising the steps of (a) sampling the aqueous solution, (b) in a closed system automatically adjusting the pH of the sample to a value of about 3.5, (c) in a closed system detecting with a pCO 2 probe the total carbon dioxide of the pH-adjusted sample, the sample having been adjusted to and being maintained at a selected temperature value, and (d) adding a sufficient amount of an alkalinity-controlling chemical to said solution to maintain alkalinity near a value customary for drinking water.
Claim 2
Independent Claim
126 words
A method for continuously monitoring and controlling the total alkalinity attributable to carbon dioxide, bicarbonate ion and carbonate ion in an aqueous solution in which it is desirable to maintain alkalinity near a value customary for drinking water for environmental purposes, said method comprising the steps of (a) sampling the aqueous solution, (b) in a closed system automatically adjusting the pH of the sample to a value of about 3.5, (c) in a closed system detecting with a pCO 2 probe the total carbon dioxide of the pH-adjusted sample, the sample having been adjusted to and being maintained at a selected temperature value, and (d) adding a sufficient amount of an alkalinity-controlling chemical to said solution to maintain alkalinity near a value customary for drinking water.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein the aqueous solution is in a water treatment system.
Claim 4
Dependent Claim
15 words
The method of claim 2 wherein the water treatment system is a surface-water treatment system.
Claim 5
Dependent Claim
57 words
The method of claim 3 wherein said surface-water treatment system comprises a flocculator and a settling tank; wherein the aqueous solution is sampled at a point prior to any treatment step being carried out in said system; wherein the aqueous solution is sampled in the flocculator; and wherein the aqueous solution is sampled in the settling tank.
Claim 6
Dependent Claim
17 words
The method of claim 2 wherein the water treatment system is a lime-soda ash water softening system.
Claim 7
Dependent Claim
42 words
The method of claim 5 wherein said softening system comprises a flocculator-clarifier; wherein the aqueous solution is sampled at a point prior to any treatment step being carried out in said system; and wherein the aqueous solution is sampled in the flocculator-clarifier.
Claim 8
Dependent Claim
25 words
The method of claim 6 wherein said softening system further comprises a recarbonation tank, and wherein the aqueous solution is additionally sampled in said tank.
Claim 9
Dependent Claim
16 words
The method of claim 2 wherein the water treatment system is a waste water treatment system.
Claim 10
Dependent Claim
16 words
The method of claim 8 wherein said waste water treatment system is a phosphorus removal system.
Claim 11
Dependent Claim
40 words
The method of claim 9 wherein said phosphorus removal system uses lime as the precipitating agent for the removal of phosphorus, and wherein the aqueous solution is sampled at a point prior to the lime being added to said solution.
Claim 12
Dependent Claim
58 words
The method of claim 9 wherein said phosphorus removal system uses tertiary treatment by chemical precipitation for phosphorus removal; wherein said phosphorus removal system comprises a sedimentation tank; wherein the aqueous solution is sampled at a point prior to the addition of the additives for chemical precipitation, and wherein the aqueous solution is sampled in the sedimentation tank.
Claim 13
Dependent Claim
16 words
The method of claim 8 wherein said waste water treatment system is a biological nitrification system.
Claim 14
Dependent Claim
49 words
The method of claim 12 wherein said nitrification system comprises a compartmented aeration tank; wherein the aqueous solution is sampled at a point prior to any treatment step being carried out in said nitrification system; and wherein the aqueous solution is sampled in each compartment of said aeration tank.
Claim 15
Dependent Claim
16 words
The method of claim 8 wherein said waste water treatment system is a breakpoint chlorination system.
Claim 16
Dependent Claim
45 words
The method of claim 14 wherein said chlorination system comprises a breakpoint chamber; wherein the aqueous solution is sampled at a point prior to any treatment step being carried out in said chlorination system; and wherein the aqueous solution is sampled in said breakpoint chamber.
Claim 17
Dependent Claim
14 words
The method of claim 1 wherein the aqueous solution is in a cooling tower.
References Cited (Backward Citations)
US2661332A
Cited
US3129717A
Cited
US3147081A
Cited
US3238128A
Cited
US3300404A
Cited
US3398079A
Cited
US3361150A
Cited
US3592212A
Cited
US3705088A
Cited
US3709812A
Cited
US3719576A
Cited
US3673069A
Cited
US3844303A
Cited
DE2452863A1
Cited
US3957613A
Cited
US4116834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-06 | 1985-01-05 | 1985-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-06 | 1989-01-05 | 1989-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-06 | 1993-01-05 | 1993-07-07 | $7700.00 | Window Closed / Lapsed |