Systems and methods for using a filtration medium coated with a zwitterionic polyelectrolyte to treat slop water recovered. In some embodiments, the systems include: a treatment unit including an inlet for receiving a slop water stream into the treatment unit, a first filtration medium including a porous substrate at least partially coated with a zwitterionic polyelectrolyte, wherein the first filtration medium is disposed to separate a first portion of the slop water stream in the treatment unit from a second portion of the slop water stream in the treatment unit, wherein the first portion of the slop water stream includes water, a first outlet on a first side of the first filtration medium, and a second outlet on a second side of the first filtration medium opposite the first side.

The present invention relates to a hollow-fiber membrane module including: a hollow-fiber membrane bundle including a plurality of hollow-fiber membranes bundled in a potting part; a housing enclosing the hollow-fiber membrane bundle; and a protective member contacting with an outer surface of the potting part and continuously covering the outer surface, in which the protective member has a notched part through which one end of the protective member communicates with another end in a longitudinal direction of the hollow-fiber membrane bundle.

The present invention relates to a hollow-fiber membrane module including: a hollow-fiber membrane bundle including a plurality of hollow-fiber membranes bundled in a potting part; a housing enclosing the hollow-fiber membrane bundle; and a protective member contacting with an outer surface of the potting part and continuously covering the outer surface, in which the protective member has a notched part through which one end of the protective member communicates with another end in a longitudinal direction of the hollow-fiber membrane bundle.

A membrane filter for filtering a liquid to be filtered, having a downwardly open base element through which flow can pass and which has a tubular shell and precisely one membrane carrier arranged therein, wherein the membrane carrier is connected to the shell by way of at least one anchoring point, having hollow fiber-type membranes fastened at the top in the membrane carrier, having a circumferentially closed pipe which, adjoining the top of the shell of the base element, surrounds the hollow fiber-type membranes, having a gas inlet into the base element, having at least one permeate collecting chamber, having at least one permeate outlet, and having at least one downwardly open flow chamber between the shell and the membrane carrier, which flow chamber has an outlet at the top, wherein the at least one flow chamber, in every horizontal section, adjoins both the shell and the membrane carrier.

A dehumidifying element includes a dehumidification space that are formed between a pair of potting material portions and that accommodates hollow fiber membranes through which highly humid dehumidification-target air is circulated. The dehumidifying element also includes an air supply hole for supplying purging air having a humidity lower than the dehumidification-target air to the dehumidification space and an air discharge hole for discharging the purging air supplied to the dehumidification space. In the dehumidification space, a guide member is disposed so as to form a plurality of regions in a cylindrical casing as viewed in the axis-L direction, and the hollow fiber membranes are accommodated in the dehumidification space so as to be distributed into the plurality of regions.

A dehumidifying element includes a dehumidification space that are formed between a pair of potting material portions and that accommodates hollow fiber membranes through which highly humid dehumidification-target air is circulated. The dehumidifying element also includes an air supply hole for supplying purging air having a humidity lower than the dehumidification-target air to the dehumidification space and an air discharge hole for discharging the purging air supplied to the dehumidification space. In the dehumidification space, a guide member is disposed so as to form a plurality of regions in a cylindrical casing as viewed in the axis-L direction, and the hollow fiber membranes are accommodated in the dehumidification space so as to be distributed into the plurality of regions.

An oxygenator apparatus for use in an extracorporeal circuit. The apparatus includes a housing and a membrane assembly disposed within the housing. The membrane assembly includes a first plurality of gas exchange elements disposed in a first zone and a second plurality of gas exchange elements disposed in a second zone. The second zone is arranged concentrically around the first zone. The first and second plurality of gas exchange elements are fluidly open along a body and fluidly separated along a distal end. The first zone is configured to be fluidly coupled to an oxygen source and the second zone is configured to be fluidly coupled to a negative pressure source. A blood flow path includes a generally radial flow through the first zone to add oxygen to the blood and the second zone to separate gaseous micro emboli from the blood through the plurality of gas exchange elements.

An oxygenator apparatus for use in an extracorporeal circuit. The apparatus includes a housing and a membrane assembly disposed within the housing. The membrane assembly includes a first plurality of gas exchange elements disposed in a first zone and a second plurality of gas exchange elements disposed in a second zone. The second zone is arranged concentrically around the first zone. The first and second plurality of gas exchange elements are fluidly open along a body and fluidly separated along a distal end. The first zone is configured to be fluidly coupled to an oxygen source and the second zone is configured to be fluidly coupled to a negative pressure source. A blood flow path includes a generally radial flow through the first zone to add oxygen to the blood and the second zone to separate gaseous micro emboli from the blood through the plurality of gas exchange elements.

Provided are a composition for forming a polyurethane resin used for a membrane sealing material, the composition having low viscosity and contributing to the formation of a membrane sealing material having reduced elution of low-molecular weight reaction products; and a membrane sealing material and a membrane module using this composition. Disclosed is a composition for forming a polyurethane resin used for a membrane sealing material, the composition including a base agent (A) and a curing agent (B), wherein the base agent (A) comprises an isocyanate group-terminated prepolymer (A1), the isocyanate group-terminated prepolymer (A1) is a reaction product between an isocyanate group-containing compound (a1) and an active hydrogen-containing compound (a2), the base agent (A) comprises diphenylmethane diisocyanate, the monomer content of the diphenylmethane diisocyanate is 35% by mass or less, and the curing agent (B) comprises a compound (b1) represented by Formula (1). In Formula (1), R represents an alkyl group having 2 or more carbon atoms. ##STR00001##

Provided are a composition for forming a polyurethane resin used for a membrane sealing material, the composition having low viscosity and contributing to the formation of a membrane sealing material having reduced elution of low-molecular weight reaction products; and a membrane sealing material and a membrane module using this composition. Disclosed is a composition for forming a polyurethane resin used for a membrane sealing material, the composition including a base agent (A) and a curing agent (B), wherein the base agent (A) comprises an isocyanate group-terminated prepolymer (A1), the isocyanate group-terminated prepolymer (A1) is a reaction product between an isocyanate group-containing compound (a1) and an active hydrogen-containing compound (a2), the base agent (A) comprises diphenylmethane diisocyanate, the monomer content of the diphenylmethane diisocyanate is 35% by mass or less, and the curing agent (B) comprises a compound (b1) represented by Formula (1). In Formula (1), R represents an alkyl group having 2 or more carbon atoms. ##STR00001##