A water purification system (100) is provided and includes: a composite filter cartridge assembly (1), a booster pump (4) and a waste-water solenoid valve (7). The composite filter cartridge assembly (1) includes a filter casing (11) and a composite filter cartridge (12). The filter casing (11) has a raw-water inlet (111), a pretreated-water outlet (114), a pretreated-water inlet (115), a purified-water outlet (112) and a concentrated-water outlet (113). The composite filter cartridge (12) includes a filtering part and a mouthfeel-improving filter cartridge (123) which are arranged along an up-and-down direction. The pretreated-water outlet (114) is communicated with a water-output end of a pretreating filter cartridge (121) of the filtering part and with the booster pump (4). The pretreated-water inlet (115) is communicated with a water-input end of a fine filter cartridge (122) of the filtering part and with the booster pump (4).

The present invention provides compact spiral-wound filter elements having cassette-like performance. The invention further provides filtration systems (e.g., TFF systems) and processes (e.g., SPTFF processes) employing compact spiral-wound filter elements having cassette-like performance.

A by-pass control sleeve has circumferential protrusions along its outer surface. The protrusions of the by-pass control sleeve may be distributed along the length of the sleeve with constant diameter sections of the sleeve therebetween. The protrusions may be asymmetrical and/or may have a steep and/or concave curved forward face. A method of making a by-pass control sleeve comprises molding the protrusions on an outer surface of the sleeve. A method of installing the by-pass control sleeve comprises sliding the sleeve onto an end of a spiral wound membrane element. A combination of the by-pass control sleeve fixed to the spiral wound membrane element may be installed in a pressure housing.

Affinity chromatography devices that include a fibrillated heat treated polymer membrane that contains inorganic particles having a spherical shape and a particle size distribution that has a D90/D10 less than or equal to 3 are disclosed. A blend or combination of spherical inorganic particles having a nominal particle size from about 5 microns to about 20 microns may be utilized. Also, the devices have a hydraulic permeability from about 200(10.sup.12 cm.sup.2) to about 700(10.sup.12 cm.sup.2). The affinity chromatography devices have a dynamic binding capacity (DBC) greater than 35 mg/ml at 10% breakthrough at a residence time of 20 seconds. Additionally, the affinity chromatography devices have a cycling durability of at least 100 cycles without exceeding an operating pressure of 0.3 MPa. Manifolds containing multiple affinity chromatography devices and manifolds in a parallel configuration are also disclosed.

Embodiments of the present invention provide the integration of arbitrary flow directing patterns, deposited or integrated on or into the porous permeate spacer in a spiral-wound membrane separation element.

The present disclosure relates to a block copolymer, a carbon dioxide separation membrane using the same and a method for preparing the same. The carbon dioxide separation membrane includes a copolymer represented by the following [Chemical Formula 1], and thus has excellent thermal, chemical and mechanical stabilities and shows high selectivity and permeability to carbon dioxide.

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Provided is a method for separating, from a raw gas containing a specific gas, the specific gas using a gas separation membrane module. The gas separation membrane module includes a housing and a gas separation membrane element enclosed in the housing. The gas separation membrane element includes a gas separation membrane including a hydrophilic resin composition layer for selectively allowing for permeation of the specific gas. The method includes the steps of: increasing pressure in an interior of the gas separation membrane module; increasing a temperature in the interior of the gas separation membrane module; and feeding a raw gas to the interior of the gas separation membrane module in that order.

A system, method and device are disclosed for bio-processing a feed stream and providing a constant output by operating a continuous single-pass tangential-flow process. The single-pass process provides high conversion concentration while operating at relatively low feed flow rates, and the process can also be used to provide constant output diafiltration.

The present invention provides compact spiral-wound filter elements having cassette-like performance. The invention further provides filtration systems (e.g., TFF systems) and processes (e.g., SPTFF processes) employing compact spiral-wound filter elements having cassette-like performance.

According to the present invention, it is possible to obtain a separation membrane element which has an element configuration having high fresh water production performance and high removal performance, has an improved membrane surface linear velocity whereby fouling due to hardly-soluble salts (scales) or organic matters is less likely to occur on the membrane surface particularly in high recovery ratio operation, and is excellent in fresh water production performance and removal performance over a long period of time.