Abstract:
A filtration device is provided which includes a housing containing a porous membrane formed of a porous membrane substrate having its exposed surface completely modified with a perfluorocarbon copolymer composition. The porous membrane has substantially the same permeability as the porous membrane substrate.
Abstract:
Described is a method and device for the removal of filling fluid and/or other soluble residues from the bore cavities of bundles of hollow fibres. The bundles of fibres are first precleaned by centrifuging and subsequently cleaned by spraying and centrifuging, preferably in a multi-stage procedure. The first spraying stage is preferably a single-pass operation, while subsequent stages are carried out in closed cycles. When the concentration of the impurities in the cleaning fluid has reached a constant level, the fluid is used for later cleaning stage. The fluid from the first spraying stage is fed to a reprocessing unit.
Abstract:
Bei einer Querstromfiltrationsanlage (1) zum Abtrennen von Ölen, Fetten, Schmutzpartikeln oder anderen unerwünschten Stoffen aus Flüssigkeiten mit einer Pumpe (6) zum Fördern der Flüssigkeiten, mit einem Arbeitsabteil (3), aus welchem die zu behandelnde Flüssigkeit mit Hilfe der Pumpe (6) entnommen und einer Filtrationsstufe (7) zugeführt werden kann, deren Permeat aus der Anlage (1) abgeleitet und deren Retentat wieder in das Arbeitsabteil (3) zurückgeleitet werden kann, und mit einem Spülabteil (4), aus welchem eine Spüllösung entnommen und der Filtrationsstufe (7) zugeführt werden kann, wobei das Retentat der Spüllösung wieder in das Spülabteil (4) zurückgeleitet werden kann, ist ein einziger Tank (2) vorgesehen, der in drei separate Kammern (3,4,5) unterteilt ist, von denen eine das Arbeitsabteil (3), eine das Spülabteil (4) und eine ein Pumpabteil (5) bildet, wobei das Pumpabteil (5) eine Eintauch-Umwälzpumpe (6) zum Fördern der Flüssigkeiten enthält und wobei Fußventile (8a,8b) zwischen dem Pumpabteil (5) und Arbeitsabteil (3) sowie zwischen dem Pumpabteil (5) und dem Spülabteil (4) vorgesehen sind, über die alternativ eine kommunizierende Verbindung zwischen dem Pumpabteil (5) und einer der beiden anderen Kammern (3,4) hergestellt werden kann. Dadurch können auch Lösungen mit aggressiven oder stark abrasiven Stoffen ohne Sicherheits- und Dichtungsprobleme aufbereitet werden.
Abstract:
The present invention provides a membrane separation system with a recirculating closed loop design and a feed control valve outside the loop which admits feed to the loop under permeate level control. The system is operable with a constant recirculation flow thus minimizing membrane fouling. A fast flush is also possible without closing the permeate valve.
Abstract:
A jig used to filter and catch specimens such as cells and provided with a filter having numerous pores and to a filtering device used to hangle this jig. The jig is provided with a water-retentive piece (3) and the jig body (4) with a communicating hole (7) and a communicating hole (7'). The water-retentive piece (3) facilitates wet fixation of the specimen and the two holes (7), (7') increase the operatability. The filtering jig is provided with a pressing part (47) for preventing the filter (6) from being clogged. Fixation of the filtering jig to the filtering device enables quick and easy catch and staining of the specimen.
Abstract:
A system for filtration of matter from a liquid suspension, for instance blood, through a membrane uses a rotor (22) within a concentric shell (24) rotating with a surface velocity which, together with the rotor-shell gap and suspension viscosity, establishes vigorous vortex cells about the rotor. At least one of the rotor and shell surfaces include a filter membrane (40). Tangential velocity components at the membrane surface constantly sweep the membrane surface to limit cell deposition tendencies while constantly replenishing the medium to be filtered. The vortex cells are established along the length of the membrane despite the constant extraction of filtrate and the resultant change in physical characteristics of the suspension.
Abstract:
Device for making potable water out of water contaminated by a. o. chemical, biological and nuclear pollutants, as well as by pathogenic bacteria, viruses and normal solid particles, said device being provided by a perforated plate filter, connected to a finer filter being coupled to an ultrafilter directly followed by a hyperfilter without interposition of a buffertank and an activated carbon filter, a control device being provided at the ultrafilter's entrance controlled by a pressure-switch at the ultrafilter's exit, said control device keeping the pressure at the exit of the ultrafilter approximately constant.
Abstract:
Système pour filtrer une substance d'une suspension liquide, par exemple du sang, grâce à une membrane, utilisant un rotor (22) situé dans une enveloppe concentrique (24) tournant avec une vitesse superficielle qui, de concert avec la viscosité de la suspension et l'espace entre le rotor et l'enveloppe, crée des cellules de tourbillons puissants autour du rotor. Au moins l'une des surfaces du rotor et de l'enveloppe comporte une membrane de filtrage (40). Les composants à vitesse tangentielle à la surface de la membrane balaient constamment la surface de la membrane afin de limiter les tendances de dépositions cellulaires tout en remplissant sans arrêt le milieu à filtrer. Les cellules de tourbillons sont créées sur la longueur de la membrane, en dépit du retrait constant du filtrat et de la modification résultant dans les caractéristiques physiques de la suspension.
Abstract:
Water substantially free of pyrogens and microorganisms that meets the requirements of United States Pharmacopoeia Standard USP XX Water for Injection is produced by processing drinking quality water through a filtration step adapted to remove organic contaminants and impurities that degrade downstream separation membranes, a reverse osmosis step to remove dissolved solids, pyrogens, microorganisms and chemical contamination, a deionization step to further remove dissolved solids, and an ultrafiltration step to remove pyrogens. A sterile filter to remove microorganisms increases the water quality to USP XX Sterile Water for Injection. Means are provided to periodically remove accumulated chemical contaminants, pyrogens and microorganisms from the reverse osmosis apparatus, the deionization apparatus and the ultrafiltration apparatus. The sterile water can be admixed with a sterile concentrate composition to produce a sterile dilute solution that can be packaged under sterile conditions.
Abstract:
A reverse-osmosis tubular membrane module has a plurality of tubular membrane tubes (50) arranged in a set of parallel supporting tubes (12) with an axial annular permeate flow channel (64) defined between each membrane tube and the supporting tubes (12) within which it is contained and containing an open neck resilient material (54). Supports (18) are provided at each end of the supporting tubes to receive the opposite ends of the membrane tubes and have permeate collection passageways (24) therein connected (at 46) to receive permeate from the annular channels (64). U-shaped connecting tubes (26) connect the adjacent ends of pairs of membrane tubes to provide a continuous flow path with the interior of the membrane tubes of the module. Means are provided for forcing the U-shaped connecting tubes (26) at each end of the module into a resilient grommet (56) to provide a sealing relationship with the interior of the membrane tubes (50).