A customizable multi-stage fluid treatment assembly typically includes a connector, a plurality of cartridges, and a cap. The plurality of cartridges have a treatment medium spaced within an interior volume of the individual cartridges, between the ends thereof. The ends of the plurality of cartridges are configured to receive a fluid, bring the fluid into operative contact with the treatment medium, and dispense the fluid from the opposing end of the cartridge. The connector is coupled with one end of the plurality of cartridges and has an inlet and an outlet for receiving and dispensing the fluid to and from an appliance. The cap is coupled with the other end of the plurality of cartridges, enclosing the fluid treatment assembly, which is configured to be received in a cavity of an appliance. The cartridges of the plurality of cartridges may be individually replaced with cartridges to meet customized needs.

A membrane filtration device includes a plurality of membrane separation units vertically disposed in multiple stages. The membrane separation unit has a primary side communicating with a backwash drainage system and a flushing-air supply system to receive supplied raw water and a secondary side communicating with a backwash-water supply system to collect permeate. The backwash-water supply system includes a backwash-water main pipe and a plurality of backwash-water branch pipes to feed the backwash water into the membrane separation units. The backwash drainage system includes a plurality of backwash-drainage branch pipes and a backwash-drainage main pipe connected in parallel to the backwash-drainage branch pipes. The flushing-air supply system includes an air main pipe for passing flushing air upward and a plurality of air branch pipes for feeding flushing air into the membrane separation units, the air branch pipes being connected in parallel to the air main pipe.

A membrane filtration device includes a plurality of membrane separation units vertically disposed in multiple stages. The membrane separation unit has a primary side communicating with a backwash drainage system and a flushing-air supply system to receive supplied raw water and a secondary side communicating with a backwash-water supply system to collect permeate. The backwash-water supply system includes a backwash-water main pipe and a plurality of backwash-water branch pipes to feed the backwash water into the membrane separation units. The backwash drainage system includes a plurality of backwash-drainage branch pipes and a backwash-drainage main pipe connected in parallel to the backwash-drainage branch pipes. The flushing-air supply system includes an air main pipe for passing flushing air upward and a plurality of air branch pipes for feeding flushing air into the membrane separation units, the air branch pipes being connected in parallel to the air main pipe.

Embodiments relate generally to a filter (110), for example, for attachment onto a gas detector device or a gas sensor, and attempt to improve the efficiency and service life of the filter (110). Embodiments typically comprise a dustproof membrane (114) and a waterproof membrane (113). Some embodiments may also comprise a splash-proof cap (130) and/or features to reduce negative pressure on the filter (110).

Embodiments relate generally to a filter (110), for example, for attachment onto a gas detector device or a gas sensor, and attempt to improve the efficiency and service life of the filter (110). Embodiments typically comprise a dustproof membrane (114) and a waterproof membrane (113). Some embodiments may also comprise a splash-proof cap (130) and/or features to reduce negative pressure on the filter (110).

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##

A bio-reactive container and filter assembly to improve flow rates and mass transfer without increased pressure. An inlet filter membrane secured to the container defines a container chamber in combination with the container. An inlet filter membrane element may also be secured to the container to provide structural support to the membrane. An outlet membrane secured to the container defines a container chamber in combination with the container. An outlet filter membrane element may also be secured to the container to provide structural support to the outlet membrane. Inlet and/or outlet filters and/or filter elements are constructed to significantly increase surface area available for fluid and/or gas ingress and/or egress. Single and double layer membranes with mixtures of hydrophobic and hydrophilic characteristics are used to maximize perfusion and gasification/degasification of bio-reactive containers.

A bio-reactive container and filter assembly to improve flow rates and mass transfer without increased pressure. An inlet filter membrane secured to the container defines a container chamber in combination with the container. An inlet filter membrane element may also be secured to the container to provide structural support to the membrane. An outlet membrane secured to the container defines a container chamber in combination with the container. An outlet filter membrane element may also be secured to the container to provide structural support to the outlet membrane. Inlet and/or outlet filters and/or filter elements are constructed to significantly increase surface area available for fluid and/or gas ingress and/or egress. Single and double layer membranes with mixtures of hydrophobic and hydrophilic characteristics are used to maximize perfusion and gasification/degasification of bio-reactive containers.

Module for gas separation that maintains moisture retention of a gas separation active layer at a uniform level has a composite hollow-fiber membrane configured as the interior of an exterior body and has a porous hollow-fiber support body and a gas separation active layer disposed on the surface of the hollow-fiber support body. The exterior body has a supply port and a discharge port for a first gas passing through the outer side of the composite hollow-fiber membrane, and a supply port and a discharge port for a second gas passing through the inner side of the composite hollow-fiber membrane. The first gas flows through a first space enclosed by the exterior body and the outer side of the composite hollow-fiber membrane and the second gas flows through a second space separated by the composite hollow-fiber membrane and the exterior body. The first space is filled with an absorbing solution.

Module for gas separation that maintains moisture retention of a gas separation active layer at a uniform level has a composite hollow-fiber membrane configured as the interior of an exterior body and has a porous hollow-fiber support body and a gas separation active layer disposed on the surface of the hollow-fiber support body. The exterior body has a supply port and a discharge port for a first gas passing through the outer side of the composite hollow-fiber membrane, and a supply port and a discharge port for a second gas passing through the inner side of the composite hollow-fiber membrane. The first gas flows through a first space enclosed by the exterior body and the outer side of the composite hollow-fiber membrane and the second gas flows through a second space separated by the composite hollow-fiber membrane and the exterior body. The first space is filled with an absorbing solution.