Reduction of the amount of sulphur compounds in a sulphur compounds contaminated wastewater stream using a granular sludge treatment system
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C02F-003/34
C02F-003/00
C02F-003/28
C02F-101/10
C02F-103/36
출원번호
US-0116237
(2015-02-05)
등록번호
US-10059610
(2018-08-28)
우선권정보
NO-20140141 (2014-02-05)
국제출원번호
PCT/EP2015/052374
(2015-02-05)
국제공개번호
WO2015/118048
(2015-08-13)
발명자
/ 주소
Bakke, Rune
Dinamarca, Carlos Antonio Saldias
Franke, Wolfram
출원인 / 주소
Yara International ASA
대리인 / 주소
Amster, Rothstein & Ebenstein LLP
인용정보
피인용 횟수 :
0인용 특허 :
5
초록▼
The invention relates to a process for reducing the amount of sulphur compounds in a sulphur compounds contaminated wastewater stream, using a granular sludge treatment system (10) comprising anaerobic microorganisms, wherein the process comprises the steps of adding an aqueous nitrate solution to t
The invention relates to a process for reducing the amount of sulphur compounds in a sulphur compounds contaminated wastewater stream, using a granular sludge treatment system (10) comprising anaerobic microorganisms, wherein the process comprises the steps of adding an aqueous nitrate solution to the wastewater stream, contacting the wastewater stream with the anaerobic microorganisms, and anoxic oxidation of at least part of the sulphur compounds in the sulphur compounds contaminated wastewater stream by the anaerobic microorganisms, resulting in a sulphur compounds depleted wastewater stream. The invention furthermore relates to such a granular sludge treatment system (10).
대표청구항▼
1. Process for reducing the amount of sulphur compounds in a sulphur compounds contaminated wastewater stream, using a granular sludge treatment system (10) comprising anaerobic microorganisms, wherein the process comprises the steps of contacting the sulphur compounds contaminated wastewater stream
1. Process for reducing the amount of sulphur compounds in a sulphur compounds contaminated wastewater stream, using a granular sludge treatment system (10) comprising anaerobic microorganisms, wherein the process comprises the steps of contacting the sulphur compounds contaminated wastewater stream with the anaerobic microorganisms; andoxidation of at least part of the sulphur compounds in the sulphur compounds contaminated wastewater stream by the anaerobic microorganisms, CHARACTERIZED IN THAT the process further comprises the step of adding an aqueous nitrate solution to the sulphur compounds contaminated wastewater stream prior to being contacted with the anaerobic microorganisms, enabling the anaerobic microorganisms to oxidize the sulphur compounds without the presence of oxygen; and IN THAT the aqueous nutrient solution comprises a phosphorous source. 2. The process according to claim 1, wherein the aqueous nitrate solution is chosen from an ammonium, calcium, potassium or sodium nitrate solution or any combination thereof. 3. The process according to claim 1, wherein the phosphorous source is an aqueous phosphoric acid solution. 4. The process according to claim 2, wherein the process comprises the step of automatically adjusting the dosage of the nutrients solution added to the wastewater stream in relation to the sulphur compound content in the sulphur compounds contaminated wastewater stream at an inlet of the granular sludge treatment system. 5. The process according to claim 1, wherein the sulphur compounds comprise hydrogen sulphide. 6. The process according to claim 1, wherein the wastewater stream is an industrial wastewater stream. 7. Granular sludge treatment system (10) arranged to reduce the amount of sulphur compounds in a sulphur compounds contaminated wastewater stream, the granular sludge treatment system (10) comprising anaerobic microorganisms capable of oxidizing the sulphur compounds, these anaerobic microorganisms being arranged to be contacted with the sulphur compounds and being arranged to oxidize at least part of the sulphur compounds in the sulphur compounds contaminated wastewater stream, resulting in a sulphur compounds depleted wastewater stream, CHARACTERIZED IN THAT the granular sludge treatment system comprises a dosage system (6) for adding an aqueous nitrate solution to the sulphur compounds contaminated wastewater stream before being contacted with the anaerobic microorganisms, enabling the anaerobic microorganisms to oxidize the sulphur compounds without the presence of oxygen. 8. Granular sludge treatment system (10) according to claim 7, wherein the granular sludge treatment system (10) comprises a controller (5) that is arranged to monitor one or more signals from loads of sulphur compounds at an inlet (1) of a granular sludge reactor (11) forming part of the granular sludge treatment system (10);calculate the demand of the nitrogen and/or the phosphor source in the nutrient solution for the anaerobic microorganisms; andadjust the dosage of the nitrogen and/or the phosphor source in the nutrient solution based on the demand of the nitrogen and/or the phosphor source equaling to a ratio of sulphur compound, nitrogen and phosphor source of 20:10:1 based on weight. 9. Granular sludge treatment system (10) according to claim 8, wherein the controller (5) is arranged to simultaneously adapt the dosage of the nitrogen and the phosphor source in the nutrient solution. 10. Granular sludge treatment system (10) according to claim 9, wherein the controller (5) is arranged to adapt the dosage of the nitrogen and the phosphor source in the nutrient solution separately. 11. Granular sludge treatment system (10) according to claim 7, wherein the system (10) comprises a supersonic probe (7) arranged to measure the flow volume stream at the inlet (1) of the granular sludge reactor (11). 12. Granular sludge treatment system (10) according to claim 7, wherein the system (10) comprises a headspace (3) arranged to allow the produced off-gas to leave the granular sludge reactor (11). 13. Use of a granular sludge treatment system (10) according to claim 7 for reducing the amount of sulphur compounds in a sulphur compounds contaminated wastewater stream.
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이 특허에 인용된 특허 (5)
Hitzman, Donald O.; Dennis, D. Michael; Iiams, Bruce Alan, Apparatus for on-site production of nitrate ions.
Hyvik Henrik (Skien NOX) Eskilt Jan P. (Eidanger NOX) Hovland Jon (Skien NOX), Method for removing hydrogen sulphide from oil-containing water and equipment therefor.
Tellier Jacques (Lons FRX) Sirvins Andre (Pau FRX) Gautier Jean-Claude (Billre FRX) Tramier Bernard (Billre FRX), Microemulsion of nutrient substances.
Hudson Alice P. ; Peggs Sasha J., Use of bioaugmentation and a controlled release nitrate source to reduce hydrogen sulfide concentrations in wastewater systems.
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