A spiral wound membrane module adapted for hyperfiltration and including at least one membrane envelope and feed spacer sheet wound about a central permeate tube to form an inlet and outlet scroll face and an outer periphery, wherein the feed spacer sheet includes: i) a feed entrance section extending along the permeate collection tube from the inlet scroll face toward the outlet scroll face, ii) a feed exit section extending along the outer periphery from the outlet scroll face toward the inlet scroll face, and iii) a central feed section located between the feed entrance section and the feed exit section; and wherein the feed entrance section has a median resistance to flow in a direction parallel to the permeate collection tube that is less than 25% of the median resistance to flow of the central feed section in a direction perpendicular to the permeate collection tube.

A disposable cell enrichment kit includes a crossflow filtration device configured to be disposed along a main loop pathway and to receive a process volume containing a biological sample and utilize crossflow filtration, via a micro-porous membrane, to retain a specific cell population in a retentate from the process volume and to remove a permeate including certain biological components from the process volume. The crossflow filtration device includes a laminated filtration unit that includes the micro-porous membrane, a first mating portion, a second mating portion, and a membrane support. The membrane support includes a first plurality of structural features that define a first plurality of openings, wherein the first plurality of structural features are coupled to the micro-porous membrane and provide support to the micro-porous membrane, and the first plurality of openings allow the permeate to flow through them after crossing the micro-porous membrane.

A method of operating a high velocity cross flow dynamic membrane filtration includes feeding a fluid stream into a pressure vessel, in which the vessel defines a treatment chamber containing a disc membrane assembly having a first support shaft and a second support shaft, each support shaft defining a longitudinal axis about which is positioned a plurality of axially spaced membrane discs. The method further includes distributing the fluid stream over at least a portion of the disc membrane assembly. The method also includes discharging a first portion of the fluid stream from the vessel and discharging a second portion of the fluid stream from the vessel. The method additionally includes rotating the first support shaft and the second support shaft in a first direction. The rotating includes modulating a rotation rate in response to the flow rate of the second portion of the fluid stream.

A crossflow filter device for filtering a pressurised feed liquid is provided. The crossflow filter device comprises: a filter membrane; a flow channel for the pressurised feed liquid which extends in a path over a retentate surface of the membrane such that the direction of flow in the channel is tangential to the retentate surface, and a filtrate derived from the feed liquid passes through the membrane leaving retentate liquid in the flow channel; and a collection chamber for the filtrate formed on an opposite, filtrate surface of the membrane. The crossflow filter device further comprises a sealed housing having a retentate side and a filtrate side which enclose therebetween the flow channel, the filter membrane and the collection chamber. The crossflow filter device further comprises, flow channel guide walls provided at an inner surface of the retentate side of the housing. The guide walls are configured to form a fluid tight seal with the filter membrane, and thereby define the path of the flow channel over the retentate surface of the membrane.

A central tube assembly (100) for a filter cartridge and a manufacturing method for the central tube assembly (100) are provided. The central tube assembly (100) includes: a first half-tube (10) defines a first flow passage (11), and having a first water inlet (12) at an end thereof and a water output hole in a side wall thereof; a filtering membrane (30) bent to form a first membrane layer and a second membrane layer, the first half-tube (10) being disposed between the first membrane layer and the second membrane layer; an input-water filtering net (40) connected to the first half-tube (10) and disposed between the first membrane layer and the second membrane layer; a second half-tube (20) disposed outside of a bending of the filtering membrane (30), defining a second flow passage (21), and having a water input hole (22) in a side wall thereof and a first water outlet (23) at an end thereof; and a produced-water filtering net (50).

A spacer for a membrane module, the spacer comprising: a plurality of first filaments defining a plurality of fluid flow channels, in use the plurality of fluid flow channels being adjacent a membrane of the membrane module; and a plurality of second filaments provided on the plurality of first filaments and extending into the fluid flow channels, the second filaments moveable relative to the first filaments in response to an external stimulus during flow of fluid in the fluid flow channels.

A crossflow filter device for filtering a pressurised feed liquid is provided. The crossflow filter device comprises: a filter membrane; a flow channel for the pressurised feed liquid which extends in a path over a retentate surface of the membrane such that the direction of flow in the channel is tangential to the retentate surface, and a filtrate derived from the feed liquid passes through the membrane leaving retentate liquid in the flow channel; and a collection chamber for the filtrate formed on an opposite, filtrate surface of the membrane. The crossflow filter device further comprises a sealed housing having a retentate side and a filtrate side which enclose therebetween the flow channel, the filter membrane and the collection chamber. The path for the flow channel winds back and forth over the retentate surface of the membrane producing plural hairpin bends, and the crossflow filter device further comprises flow channel guide walls provided at an inner surface of the retentate side of the housing to define the path of the flow channel over the retentate surface of the membrane. The respective guide wall defining the line of the inner radius of each hairpin bend is shaped such that retentate liquid flowing along that guide wall has to turn through at least 270? to complete the hairpin bend.

A spacer for a membrane module, the spacer comprising: a plurality of first filaments defining a plurality of fluid flow channels, in use the plurality of fluid flow channels being adjacent a membrane of the membrane module; and a plurality of second filaments provided on the plurality of first filaments and extending into the fluid flow channels, the second filaments moveable relative to the first filaments in response to an external stimulus during flow of fluid in the fluid flow channels.

A spiral-wound acid gas separation membrane element (1) includes a wound body which includes a laminate and a perforated core (5), the laminate being wound around the perforated core tube (5) and including: a separation membrane (2), a feed-side channel component (3), and an element constituent layer (e.g., permeate-side channel component (4)). The separation membrane (2) is provided with a sealing section (25) present at both widthwise ends of the separation membrane (2). The sealing section (25) is sealed with an adhesive. This makes it possible not only to separate acid gas from mixed gas more efficiently as compared to a conventional spiral-wound acid gas separation membrane element but also to save energy.

Described are filter cartridges, filter apparatuses, and related methods that involve a filter cartridge that includes a cartridge support that includes centering surfaces, a helical strand, or both.