[특허]Method for the treatment of sewage

Method for the treatment of sewage 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C02F-003/30
출원번호	US-0977200 (1992-11-16)
우선권정보	NL-0001917 (1991-11-18)
발명자 / 주소	Marsman Eric H. (Warnsveld NLX) Vlekke Garardus J. F. M. (Apeldoorn NLX) Urlings Leonardus G. C. M. (Hoevelaken NLX) Reitsma Berend A. H. (Deventer NLX)
출원인 / 주소	Tauw Milieu B.V. (Deventer NLX 03)
인용정보	피인용 횟수 : 63 인용 특허 : 0

초록 ▼

The invention relates to a method for the treatment of (raw) sewage in a package plant consisting of three bioreactors in series. The treatment is being carried out using three types of biomass. In a first step phosphate is removed by biological means and, at the same time, the chemical and biological oxygen demand is lowered in a highly loaded active sludge system, in a second step a nitrification is carried out, ammonium being converted to nitrate, and in a third step a denitrification is carried out using a carbon source. In the denitrification step acidified surplus sludge from the P-removing step can also be used instead of an external carbon source. The nitrifying and denitrifying bioreactors are both fixed film processes. The thickness of the biofilm on the support material in the nitrifying bioreactor can be influenced by adjusting the aeration system or by adjusting the hydraulic loading. In the denitrifying bioreactor the thickness of the biofilm can be adjusted by raising the shear by means of raising the superficial velocity in the support material. The system according to the invention makes possible effective treatment of raw sewage in a highly loaded system resulting in the far-reaching removal of COD, nitrogen and phosphate. The process can be operated in an alternative mode, where the nitrifying and denitrifying bioreactors are exchanged; first bioreactor: biological-P-removal and simultaneous reduction of COD, second bioreactor: denitrification and third bioreactor: nitrification. The effluent of the nitrifying bioreactor is recirculated to the denitrifying bioreactor. The first step is carried out in a plug flow bioreactor with an anaerobic and an aerobic zone. By using an intermediate settling tank between the first and the second step, it is possible to discharge phosphate-rich surplus sludge. The mixing in the nitrifying step is advantageously maintained by aeration under the packages of support material. Mixing in the denitrifying step is accomplished by means of a propellor.

대표청구항 ▼

Method for the treatment of sewage, wherein the treatment is carried out with the aid of three types of biomasses, said method comprising: a) biologically removing phosphate in a first step and, at the same time, reducing the chemical and biological oxygen demand in a highly loaded activated sludge system, b) converting ammonium to nitrate in a second step by biological nitrification, and c) carrying out in a third step, a denitrification using a carbon source, wherein the order of the second and the third step is exchangeable.

이 특허를 인용한 특허 (63)

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Cormier, Murphy J.; Suchecki, Jr., Ronald J.; Pertuit, Robert K.; Brown, Donald L.; Cormier, Troy L., Apparatus for denitrifying wastewater.
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Cormier, Murphy J.; Suchecki, Jr., Ronald J.; Pertuit, Robert K.; Brown, Donald L.; Cormier, Troy L., Apparatus for denitrifying wastewater.
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Cormier, Murphy J.; Suchecki, Jr., Ronald J.; Pertuit, Robert K.; Brown, Donald L.; Cormier, Troy L., Apparatus for denitrifying wastewater.
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Pollock David C. (Calgary CAX), Biodegradeable effluent nutrient removal.
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Huazhong Mao CA, Bioreactor systems for biological nutrient removal.
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Elefritz, Jr., Robert A.; Scott, III, James Holland, Continuous membrane filtration and solids reduction.
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McGrath,Michael B.; Kenny,Michael, Denitrification system for nitrified wastewater or nitrified water.
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Erdogan, Argun O.; Doyle, Michael L., Enhanced biosorption of wastewater organics using dissolved air flotation with solids recycle.
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Erdogan, Argun O.; Doyle, Michael L., Enhanced biosorption of wastewater organics using dissolved air flotation with solids recycle.
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Liu, Wenjun; Jordan, Edward J.; Zuback, Joseph E.; Smith, George W., Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods.
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Liu, Wenjun; Jordan, Edward John; Smith, George W., Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods.
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Liu, Wenjun; Jordan, Edward John; Smith, George W., Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods.
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Liu, Wenjun; Jordan, Edward John; Smith, George W., Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods.
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Liu, Wenjun; Jordan, Edward John; Smith, George W.; Zuback, Joseph Edward, Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods.
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Golcz, Andrzej, Installation and method for wastewater treatment.
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Daigger, Glen T., Low phosphorus water treatment systems.
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Goodley Mark D., Method and apparatus for denitrification of water.
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Petering John L. (804 S. Broad St. Mankato MN 56001), Method and apparatus for the treatment of concentrated wastewater.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Method for the treatment of sewage 원문보기

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Method for the treatment of sewage 원문보기

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