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公开(公告)号：EP0738180A1
公开(公告)日：1996-10-23
申请号：EP95903730.0
申请日：1994-12-19
CPC分类号： B01D65/02 , B01D2321/168
摘要： During normal operation of a hollow fiber membrane in contact with dirty water, a fouling film is produced on the surface of the membrane. Despite the fouling film, the membrane affords a desirable initial stable transmembrane flux which decreases as a function of time by at least 20 %. A method is disclosed for cleaning the outer surface of a microfiltration (MF) or ultrafiltration (UF) semipermeable hollow fiber membrane after its initial stable transmembrane flux has been decreased to an unacceptably low level. The method is specifically applicable to any fiber used to withdraw purified water from dirty water, particularly water containing organic matter including beneficial bacteria and/or undesirable inorganic salts, where the viability of the bacteria population is to be maintained. The membrane is cleaned by flowing a cleaning fluid, preferably a biocidal oxidative electrolyte having an oxidizing anion and an associated cation through the clean, permeate-side of the membrane, at low pressure no more than the bubble pressure breakthrough, usually
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2.发明公开FRAMELESS ARRAY OF HOLLOW FIBER MEMBRANES AND METHOD OF MAINTAINING CLEAN FIBER SURFACES WHILE FILTERING A SUBSTRATE TO WITHDRAW A PERMEATE 失效中空纤维膜的方法清洁无框安排过滤液体是一个PERMEAT WIN过程中，使纤维表面。
公开(公告)号：EP0669851A1
公开(公告)日：1995-09-06
申请号：EP93924469.0
申请日：1993-11-15
发明人： COTE, Pierre, Lucien , SMITH, Bradley, Michael , DEUTSCHMANN, Ake, Adolf , RODRIGUES, Carlos, Fernando, Fernandes , PEDERSEN, Steven, Kristian
CPC分类号： B01D65/08 , B01D61/142 , B01D61/145 , B01D61/147 , B01D61/18 , B01D63/02 , B01D63/021 , B01D63/022 , B01D63/04 , B01D63/043 , B01D65/02 , B01D2321/185 , C02F3/12 , C12M29/16 , Y02W10/15
摘要： A frameless array unconfined in a modular shell, proves to be a surprisingly effective membrane device for withdrawing permeate from a substrate, the flux through the membranes reaching an essentially constant relatively high value because of the critical deployment of fibers of the array as a skein, arching in a buoyantly swayable generally parabolic configuration within the substrate, above at least one of the array's headers in which the terminal end portions of the fibers are potted. The length of each fiber must be greater than the direct center-to-center distance between the array's pair of headers. For use in a large reservoir, an assembly of the array and a gas distributor means has fibers preferably >0.5 meter long, which together provide a surface area >10 m2. The terminal end portions of fibers in each header are substantially free from fiber-to-fiber contact. When used in a tank from which the permeate is withdrawn at a location low enough to overcome the transmembrane pressure differential of the fibers, the permeate is withdrawn under a vacuum induced by gravity. To increase flux, a pump may be used which provides a suction less than 75 cm of Hg. When used in combination with a gas-distribution manifold disposed beneath the skein so as to flow bubbles through it, the surfaces of the fibers are surprisingly resistant to being fouled by build-up of deposits of inanimate particles or microorganisms in the substrate. Membranes with high transmembrane pressure differential may be used, if desired, and permeate removed with a vacuum pump.
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3.发明授权FRAMELESS ARRAY OF HOLLOW FIBER MEMBRANES AND METHOD OF MAINTAINING CLEAN FIBER SURFACES WHILE FILTERING A SUBSTRATE TO WITHDRAW A PERMEATE 失效成为清洁保持纤维表面过滤液体在中空纤维膜和方法，无框安排赢得了PERMEAT
公开(公告)号：EP0669851B1
公开(公告)日：1999-03-17
申请号：EP93924469.5
申请日：1993-11-15
发明人： COTE,Pierre,Lucien Centre de Recherche ... , SMITH, Bradley, Michael , DEUTSCHMANN, Ake, Adolf , RODRIGUES, Carlos, Fernando, Fernandes , PEDERSEN, Steven, Kristian
CPC分类号： B01D65/08 , B01D61/142 , B01D61/145 , B01D61/147 , B01D61/18 , B01D63/02 , B01D63/021 , B01D63/022 , B01D63/04 , B01D63/043 , B01D65/02 , B01D2321/185 , C02F3/12 , C12M29/16 , Y02W10/15
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公开(公告)号：EP0738180B1
公开(公告)日：1998-08-19
申请号：EP95903730.0
申请日：1994-12-19
IPC分类号： B01D65/02
CPC分类号： B01D65/02 , B01D2321/168
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