IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0552558
(2009-09-02)
|
등록번호 |
US-8262911
(2012-09-11)
|
우선권정보 |
CN-2009 1 0115351 (2009-05-15) |
발명자
/ 주소 |
- Liao, Zhimin
- Xiong, Jianzhong
- Yang, Shengyun
- Zhou, Jialin
- Jiang, Xingfu
- He, Lingyun
- He, Qihu
- Ju, Dejin
- Wan, Aiguo
- Yuan, Zhihua
- Cao, Jiejun
- Tao, Kun
|
출원인 / 주소 |
- Jiangxi JDL Environmental Protection Research Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
5 |
초록
▼
A method for treatment of sludge with a facultative-organism-adapted membrane bioreactor by providing a sludge treatment system comprising a facultative digestion tank, a membrane module, an aeration system, a sludge pump, and a drainage pump, pumping sludge into the facultative digestion tank via t
A method for treatment of sludge with a facultative-organism-adapted membrane bioreactor by providing a sludge treatment system comprising a facultative digestion tank, a membrane module, an aeration system, a sludge pump, and a drainage pump, pumping sludge into the facultative digestion tank via the sludge pump and allowing for digestion, synchronously aerating and scouring the membrane module by the aeration system, pumping the sludge by the drainage pump and filtrating by the membrane module so that sludge and water are separated, and draining the water via the drainage pump. The method can digest sludge completely in the digestion tank, and solves problems existing in conventional sludge treatment methods such as large investment and high transportation cost, even achieves a subject of zero discharge of sludge.
대표청구항
▼
1. A method for treatment of sludge, comprising a) providing a sludge treatment system comprising a facultative digestion tank, a membrane module, an aeration system, a sludge pump, and a drainage pump;b) pumping sludge into said facultative digestion tank via said sludge pump;c) synchronously aerat
1. A method for treatment of sludge, comprising a) providing a sludge treatment system comprising a facultative digestion tank, a membrane module, an aeration system, a sludge pump, and a drainage pump;b) pumping sludge into said facultative digestion tank via said sludge pump;c) synchronously aerating and scouring said membrane module by said aeration system;d) maintaining most of the area of said facultative digestion tank in a facultative or anaerobic state; maintaining an average concentration of dissovled oxygen in said facultative digestion tank at below 1.0 mg/L; and controlling facultative microbes to be predominant in said facultative digestion tank, thereby allowing for facultative digestion of said sludge to be conducted in said facultative digestion tank;e) pumping said sludge by said drainage pump and filtrating by said membrane module so that said sludge and water are separated; andf) draining said water via said drainage pump. 2. The method of claim 1, wherein an opening and closure of said sludge pump is controlled by a ball-float level indicator in said facultative digestion tank. 3. The method of claim 1, wherein said facultative digestion tank is made of reinforced concrete or steel. 4. The method of claim 1, wherein said membrane module is a micro-filtration membrane module, the amount thereof is based on the amount of daily treated sludge, and the water yield thereof is equivalent to the amount of daily treated organic excess sludge. 5. The method of claim 1, wherein said aeration system is a blower aeration system and provides air-water scouring against said membrane module. 6. The method of claim 1, wherein said aeration system is a jet aeration system and provides air-water scouring against said membrane module. 7. The method of claim 5, wherein said blower aeration system comprises a blower, an air duct, an aeration pipe, an aeration branch pipe, and a perforated aeration tube, said perforated aeration tube being disposed below said membrane module, said blower being disposed out of said facultative digestion tank and being connected to said perforated aeration tube via said air duct, and providing air-water scouring against said membrane module, and an air-water ratio being 10-30: 1. 8. The method of claim 5, wherein said perforated aeration tube is disposed equidistantly below said membrane module, and connected to said blower via said aeration branch pipe, said aeration pipe, and said air duct. 9. The method of claim 5, wherein one end of said perforated aeration tube is connected to said aeration branch pipe, the other end is closed; a plurality of aeration holes is disposed at both sides of said perforated aeration tube, and an angle between said aeration hole and vertical line is ±44°-46°; a diameter of said aeration hole is 4-10 mm; and a distance between two aeration holes is 100-300 mm. 10. The method of claim 6, wherein said jet aeration system comprises a jet aerator, an air inlet, a water inlet, an outlet, an aeration pipe, an aeration branch pipe, and a perforated aeration tube; said jet aerator is disposed between said membrane modules or at the side of said membrane module;said air inlet is disposed above the liquid surface of said facultative digestion tank;said water inlet is disposed below the liquid surface of said facultative digestion tank; andsaid outlet is connected to said perforated aeration tube via said aeration pipe and said aeration branch pipe. 11. The method of claim 10, wherein when said jet aeration system works, a negative pressure is formed due to high speed of fluid flow in said jet aerator, air is absorbed by said air inlet and forms a mixture having microbe with liquid and solid in said aeration pipe, said mixture is transported by said perforated aeration tube and scours against said membrane modules, and thereby a pollution of said membrane module is avoided. 12. The method of claim 10, wherein said perforated aeration tube is disposed equidistantly below said membrane module, and connected to said jet aerator via said aeration branch pipe. 13. The method of claim 10, wherein one end of said perforated aeration tube is connected to said aeration branch pipe, the other end is closed; a plurality of aeration holes is disposed at both sides of said perforated aeration tube, and an angle between said aeration hole and vertical line is ±44°-46°; a diameter of said aeration hole is 4-10 mm; and a distance between two aeration holes is 100-300 mm. 14. A method for treatment of sludge, comprising: a) providing a sludge treatment system comprising a facultative digestion tank, a membrane module, a blower aeration system, a sludge pump, and a drainage pump;b) pumping sludge into said facultative digestion tank via said sludge pump;c) providing air-water scouring bubbles against said membrane module to synchronously aerate and scour said membrane module by said blower aeration system, wherein an air-water ratio of said air-water scouring bubbles is between 10 and 30 to 1;d) maintaining most of the area of said facultative digestion tank in a facultative or anaerobic state, maintaining an average concentration of dissovled oxygen in said facultative digestion tank at below 1.0 mg/L, and controlling facultative microbes to be predominant in said facultative digestion tank, thereby allowing for facultative digestion of said sludge to be conducted in said facultative digestion tank;e) pumping said sludge by said drainage pump and filtrating by said membrane module to separate sludge and water; andf) draining said water via said drainage pump. 15. The method of claim 14, wherein said blower aeration system comprises a blower, an air duct, an aeration pipe, an aeration branch pipe, and a perforated aeration tube, said perforated aeration tube being disposed below said membrane module, said blower being disposed out of said facultative digestion tank and being connected to said perforated aeration tube via said air duct. 16. The method of claim 14, wherein said perforated aeration tube is disposed equidistantly below said membrane module, and connected to said blower via said aeration branch pipe, said aeration pipe, and said air duct. 17. The method of claim 14, wherein one end of said perforated aeration tube is connected to said aeration branch pipe, the other end is closed; a plurality of aeration holes is disposed at both sides of said perforated aeration tube, and an angle between said aeration hole and vertical line is ±44°-46°; a diameter of said aeration hole is between 4 and 10 mm; and a distance between two aeration holes is between 100 and 300 mm. 18. A method for treatment of sludge, comprising: a) providing a sludge treatment system comprising a facultative digestion tank, a membrane module, a jet aeration system, a sludge pump, and a drainage pump; wherein said jet aeration system comprises a jet aerator, an air inlet, a water inlet, an outlet, an aeration pipe, an aeration branch pipe, and a perforated aeration tube; said jet aerator is disposed between said membrane modules or at the side of said membrane module; said air inlet is disposed above the liquid surface of said facultative digestion tank; said water inlet is disposed below the liquid surface of said facultative digestion tank; said perforated aeration tube is disposed equidistantly below said membrane module, and is connected to said outlet via said aeration pipe and said aeration branch pipe;b) pumping sludge into said facultative digestion tank via said sludge pump;c) synchronously aerating and scouring said membrane module by said jet aeration system;d) maintaining most of the area of said facultative digestion tank in a facultative or anaerobic state, and maintaining an average concentration of dissovled oxygen in said facultative digestion tank at below 1.0 mg/L, controlling facultative microbes as being predominant in said facultative digestion tank, thereby allowing for facultative digestion of said sludge to be conducted in said facultative digestion tank;e) pumping said sludge by said drainage pump and filtrating by said membrane module to separate said sludge and water; andf) draining said water via said drainage pump. 19. The method of claim 18, wherein when said jet aeration system is turned on, a negative pressure is formed due to a high speed of fluid flow in said jet aerator, air is absorbed through said air inlet and forms a mixture of liquid and solid particles and microbes in said aeration pipe, said mixture is transported through said perforated aeration tube and scours against said membrane modules, and thereby avoiding polluting said membrane module. 20. The method of claim 18, wherein one end of said perforated aeration tube is connected to said aeration branch pipe, the other end is closed; a plurality of aeration holes is disposed at both sides of said perforated aeration tube, and an angle between said aeration hole and vertical line is ±44°-46°; a diameter of said aeration hole is between 4 and 10 mm; and a distance between two aeration holes is between 100 and 300 mm.
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