Sludge density measurement for controlling a sludge treatment stage
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C02F-001/20
C02F-011/12
출원번호
US-0889810
(2001-07-20)
우선권정보
GB-19990001216 (1999-01-21)
국제출원번호
PCT/EP00/00100
(2000-01-10)
국제공개번호
WO00/43322
(2000-07-27)
발명자
/ 주소
Holdsworth, Peter
출원인 / 주소
Ciba Specialty Chemicals Water Treatments Limited
인용정보
피인용 횟수 :
2인용 특허 :
5
초록▼
A process and apparatus therefore in which a sludge treatment stage 24 is controlled in response to the density or solids content of the sludge includes flowing sludge along a flow line 1 towards the treatment stage, taking a sample from the flow line 1, degassing the sample to produce a degassed sa
A process and apparatus therefore in which a sludge treatment stage 24 is controlled in response to the density or solids content of the sludge includes flowing sludge along a flow line 1 towards the treatment stage, taking a sample from the flow line 1, degassing the sample to produce a degassed sample, measuring the density or solids content of the degassed sample, and utilizing the measured degassed density or solids content of the degassed sample for controlling the treatment stage 24.
대표청구항▼
A process and apparatus therefore in which a sludge treatment stage 24 is controlled in response to the density or solids content of the sludge includes flowing sludge along a flow line 1 towards the treatment stage, taking a sample from the flow line 1, degassing the sample to produce a degassed sa
A process and apparatus therefore in which a sludge treatment stage 24 is controlled in response to the density or solids content of the sludge includes flowing sludge along a flow line 1 towards the treatment stage, taking a sample from the flow line 1, degassing the sample to produce a degassed sample, measuring the density or solids content of the degassed sample, and utilizing the measured degassed density or solids content of the degassed sample for controlling the treatment stage 24. out 0.01 to about 10 μm. 18. A charge-modified polymer membrane, said membrane comprising a hydrophobic polymer, said membrane being rendered hydrophilic by charge-modification, said charge modification resulting from contacting said membrane with at least one polymeric wetting agent and at least one cationic charge modifying agent comprising a polyamine free of any epoxide or epichlorohydrin chemical crosslinking substituents, said charge-modification further resulting from crosslinking to said membrane said cationic charge-modifying-agent, wherein said membrane comprises a cast polymer membrane. 19. The membrane of claim 18, wherein said cationic charge modifying agent further comprises an epichlorohydrin-modified polyamine. 20. The membrane of claim 18, wherein said hydrophobic polymer is selected from the group consisting of a sulfone polymer, polyvinylidene difluoride, polytetrafluoroethylene, polypropylene, and polyethylene. 21. The membrane of claim 18, wherein said hydrophobic polymer is selected from the group consisting of a sulfone polymer, polyvinylidene difluoride, polytetrafluoroethylene, polypropylene, and polyethylene. 22. The membrane of claim 18, wherein said polymer is selected from the group consisting of polypropylene and polyethylene. 23. The membrane of claim 18, wherein said membrane possesses a pore size of from about 0.00021 μm to about 10 μm. 24. The membrane of claim 23, wherein said membrane possesses a pore size of from about 0.01 to about 10 μm. 25. A charge-modified polymer membrane, said membrane comprising a hydrophobic polymer, said membrane being rendered hydrophilic by charge-modification, said charge modification resulting from contacting said membrane with at least one polymeric wetting agent and at least one cationic charge modifying agent comprising a polyamine free of any epoxide or epichlorohydrin chemical crosslinking substituents, said charge-modification further resulting from crosslinking to said membrane said cationic charge-modifying agent, wherein said membrane comprises a melt-blown polymer membrane. 26. The membrane of claim 25, wherein said polymer is selected from the group consisting of polypropylene and polyethylene. 27. The membrane of claim 25, wherein said cationic charge modifying agent further comprises an epichlorohydrin-modified polyamine. 28. The membrane of claim 25, wherein said hydrophobic polymer is selected from the group consisting of a sulfone polymer, polyvinylidene difluoride, polytetrafluoroethylene, polypropylene, and polyethylene. 29. The membrane of claim 25, wherein said membrane possesses a pore size of from about 0.00021 μm to about 10 μm. 30. The membrane of claim 29, wherein said membrane possesses a pore size of from about 0.01 to about 10 μm. 31. A method of preparing a charge-modified polymer membrane, comprising: providing a membrane comprising a hydrophobic polymer; contacting said membrane with at least one polymeric wetting agent and a charge-modifying agent comprising a polyamine free of any epoxide or epichlorohydrin chemical crosslinking substituents, wherein said polymeric wetting agent is polyvinylalcohol or a cellulosic polymer comprising a hydrophilic functional group; and crosslinking to said membrane said cationic charge-modifying agent. 32. The method of claim 31, wherein said hydrophobic polymer is selected from the group consisting of a sulfone polymer, polyvinylidene difluoride, polytetrafluoroethylene, polypropylene, and polyethylene. 33. The method of claim 32, wherein said polymer is a sulfone polymer, said sulfone polymer being selected from the group consisting of polysulfone, polyarylsulfone, and polyethersulfone. 34. The method of claim 31, wherein said crosslinking comprises energy-induced crosslinking. 35. The method of claim 34, wherein said energy-induced crosslinking comprises heating said membrane between about 70° C. and about 200° C. in contact with said cationic charge-modifying agent. 36. The m
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이 특허에 인용된 특허 (5)
Chase ; Lee M. ; Muray ; Julius J., Maintaining optimum settling rate of activated sludge.
Parker David S. (Burton-on-Trent GB2) Shaw Stephen R. (Burton-on-Trent GB2) Hudson Robert (Burton-on-Trent GB2), Sampling equipment for sedimentation rate measuring.
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