Nitrogen-containing compounds for bacterial control in water based fluids
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C02F-003/30
C02F-003/34
C02F-101/34
출원번호
US-0268554
(2014-05-02)
등록번호
US-9399591
(2016-07-26)
발명자
/ 주소
Hernandez-Mena, Roy
출원인 / 주소
Baker Hughes Incorporated
대리인 / 주소
Mossman, Kumar & Tyler, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
An effective amount of at least one nitrogen-containing compound may be added to a wastewater stream within a water treatment system. The wastewater stream may have or include an aqueous-based fluid, a first bacteria, a second bacteria, organic acids, and combinations thereof. The first bacteria may
An effective amount of at least one nitrogen-containing compound may be added to a wastewater stream within a water treatment system. The wastewater stream may have or include an aqueous-based fluid, a first bacteria, a second bacteria, organic acids, and combinations thereof. The first bacteria may be or include, but is not limited to, filamentous bacteria, Zoogloea bacteria, and combinations thereof. The second bacteria may be or include, but is not limited to facultative bacteria, spore-forming bacteria, phenol degrading bacteria, denitrifying bacteria, organic acid-degrading bacteria, high temperature bacteria, and combinations thereof. The addition of the nitrates to an anoxic zone within the wastewater treatment system may at least partially reduce the amount of the first bacteria within the wastewater stream as compared to an otherwise identical wastewater stream in the absence of the nitrogen-containing compound(s).
대표청구항▼
1. A method comprising: adding an effective amount of at least one nitrogen-containing composition to a wastewater stream within a water treatment system; wherein the wastewater stream comprises an aqueous-based fluid, a first bacteria, a second bacteria, and at least one organic acid; and wherein t
1. A method comprising: adding an effective amount of at least one nitrogen-containing composition to a wastewater stream within a water treatment system; wherein the wastewater stream comprises an aqueous-based fluid, a first bacteria, a second bacteria, and at least one organic acid; and wherein the first bacteria is selected from the group consisting of filamentous bacteria, Zoogloea bacteria, and combinations thereof; and whereby the second bacteria out-competes the first bacteria in consuming the at least one organic acid;at least partially reducing an amount of the at least one organic acid; andat least partially reducing an amount of the first bacteria within the wastewater stream as compared to an otherwise identical wastewater stream absent the at least one nitrogen-containing composition. 2. The method of claim 1, wherein the at least one nitrogen-containing composition is selected from the group consisting of nitrates, nitrites, a denitrification intermediate, and combinations thereof. 3. The method of claim 1, wherein the second bacteria is selected from the group consisting of facultative bacteria, spore-forming bacteria, phenol degrading bacteria, denitrifying bacteria, organic acid-degrading bacteria, high temperature bacteria, and combinations thereof. 4. The method of claim 1, wherein the second bacteria consumes more of the at least one organic acid in the presence of the at least one nitrogen-containing composition as compared to an otherwise identical wastewater stream absent the at least one nitrogen-containing composition. 5. The method of claim 1, wherein the at least one organic acid is selected from the group consisting of glycolic acid, malic acid, acetic acid, lactic acid, butyric acid, propionic acid, succinic acid, fumaric acid, benzoic acid and combinations thereof. 6. The method of claim 1, wherein the at least one nitrogen-containing composition is added to at least one anoxic zone within the water treatment system selected from the group consisting of a return activated sludge (RAS) line, a secondary clarifier downstream from an aeration basin, a tank upstream from an aeration basin, an anoxic zone within the aeration basin, and combinations thereof. 7. The method of claim 1, wherein the adding the at least one nitrogen-containing composition to the wastewater stream occurs at a rate selected from the group consisting of continuously, intermittently at consistent intervals, intermittently at inconsistent intervals, and combinations thereof. 8. The method of claim 1, wherein the adding the at least one nitrogen-containing composition to the wastewater stream occurs at a nitrogen to carbon ratio of about 0.01:1 to about 100:1. 9. The method of claim 1, wherein the wastewater stream is selected from the group consisting of desalter wash water, overhead water from atmospheric or vacuum process units, strip sour water, coker blowdown, cooling water blowdown, boiler blowdown, oily water sewers, equalization tanks, cleaning solutions used for scale removal, water bottoms from storage tanks, API units, dissolved gas flotation units, and combinations thereof. 10. A method comprising: adding at least one nitrogen-containing composition to at least one anoxic zone within a water treatment system in an amount ranging from a nitrogen to carbon ratio of about 0.01:1 to about 100:1, wherein the anoxic zone comprises a wastewater stream, a first bacteria, a second bacteria, and at least one organic acid; wherein the first bacteria is selected from the group consisting of filamentous bacteria, Zoogloea bacteria, and combinations thereof; and wherein the second bacteria is selected from the group consisting of facultative bacteria, spore-forming bacteria, phenol degrading bacteria, denitrifying bacteria, organic acid-degrading bacteria, high temperature bacteria, and combinations thereof;at least partially reducing an amount of the at least one organic acid;at least partially reducing an amount of the first bacteria within the at least one anoxic zone as compared to an otherwise identical anoxic zone absent the at least one nitrogen-containing composition; andwherein the at least one anoxic zone within the water treatment system is selected from the group consisting of a return activated sludge (RAS) line downstream from an aeration basin, a secondary clarifier downstream from an aeration basin, a tank upstream from an aeration basin, an anoxic zone within the aeration basin, and combinations thereof. 11. A water treatment system having a wastewater stream flowing therethrough, the water treatment system comprising: an influent wastewater stream flowing into the water treatment system having at least a first bacteria and at least one organic acid; wherein the first bacteria is selected from the group consisting of filamentous bacteria, Zoogloea bacteria, and combinations thereof;at least one anoxic zone comprising the influent wastewater stream, an effective amount of at least one nitrogen-containing composition, and a second bacteria; wherein the second bacteria is selected from the group consisting of facultative bacteria, spore-forming bacteria, phenol degrading bacteria, denitrifying bacteria, organic acid-degrading bacteria, high temperature bacteria, and combinations thereof;an aeration basin;an effluent wastewater stream flowing out of the water treatment system; andwherein the effluent wastewater stream comprises a reduced amount of the first bacteria as compared to an otherwise identical effluent wastewater stream absent the at least one nitrogen-containing composition. 12. The water treatment system of claim 11, wherein the at least one anoxic zone is selected from the group consisting of a tank upstream from the aeration basin, a return activated sludge (RAS) line downstream from the aeration basin, a secondary clarifier downstream from the aeration basin, an anoxic zone within the aeration basin, and combinations thereof. 13. The water treatment system of claim 11, wherein the water treatment system comprises a first anoxic zone upstream from the aeration basin and a second anoxic zone downstream from the aeration basin; and wherein the wastewater stream flows from the first anoxic zone to the aeration basin to the second anoxic zone and then back to the first anoxic zone as a loop until the amount of the first bacteria is reduced to a predetermined level. 14. The water treatment system of claim 11, wherein the at least one nitrogen-containing composition is selected from the group consisting of nitrates, nitrites, a denitrification intermediate, and combination thereof. 15. The water treatment system of claim 11, wherein the at least one organic acid is selected from the group consisting of glycolic acid, malic acid, acetic acid, lactic acid, butyric acid, propionic acid, succinic acid, fumaric acid, benzoic acid, and combinations thereof. 16. The water treatment system of claim 11, wherein the effective amount of the at least one nitrogen-containing composition ranges from a nitrogen to carbon ratio of about 0.01:1 to about 100:1. 17. The water treatment system of claim 11, wherein the influent wastewater stream is selected from the group consisting of desalter wash water, overhead water from atmospheric or vacuum process units, strip sour water, coker blowdown, cooling water blowdown, boiler blowdown, oily water sewers, equalization tanks, cleaning solutions used for scale removal, water bottoms from storage tanks, API units, dissolved gas flotation units, and combinations thereof. 18. A water treatment system having a wastewater stream flowing therethrough, the water treatment system comprising: an influent wastewater stream flowing into the water treatment system having at least a first bacteria, and at least one organic acid; wherein the first bacteria is selected from the group consisting of filamentous bacteria, Zoogloea bacteria, and combinations thereof;a first anoxic zone upstream from an aeration basin;the aeration basin;a second anoxic zone downstream from the aeration basin; wherein the wastewater stream flows from the first anoxic zone to the aeration basin to the second anoxic zone and then back to the first anoxic zone as a loop until the amount of the first bacteria is reduced to a pre-determined level;an effluent wastewater stream flowing out of the water treatment system; andwherein the first anoxic zone, the second anoxic zone, and combinations thereof comprise the influent wastewater stream, an effective amount of at least one nitrogen-containing composition for the influent wastewater stream, and a second bacteria; and wherein the second bacteria is selected from the group consisting of facultative bacteria, spore-forming bacteria, phenol degrading bacteria, denitrifying bacteria, organic acid-degrading bacteria, high temperature bacteria, and combinations thereof.
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이 특허에 인용된 특허 (3)
Carolan,Adrian F.; Foreman, III,William F.; Shepherd, Jr.,John K., Biological nutrient removal process and process control system for same.
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