A humidifier comprising a wound portion wrapped around a central axis and comprising enclosures, a first one the enclosures comprising a first pair of semipermeable membranes separated by a first spacer layer to form one among wet-gas channels, and a second one of the enclosures comprising a second pair of semipermeable membranes separated by a second spacer layer to form one among dry-gas channels. The dry-gas channels are configured to receive a dry gas through at least part of a first frontal area of the wound portion and in an axial direction along the dry-gas channels. The wet-gas channels are configured to receive a wet gas through at least part of a second frontal area of the wound portion and in the axial direction along the wet-gas channels, the second frontal area being opposite to the first frontal area.

Systems and methods for filtering materials from biologic fluids are discussed. Embodiments may be used to filter cerebrospinal fluid (CSF) from a human or animal subject. In an example, CSF is separated into a permeate and retentate using a tangential flow filter. The retentate is filtered again and then returned to the subject with the permeate. During operation of the system, various parameters may be modified, such as flow rate and waste rate.

Systems and methods for filtering materials from biologic fluids are discussed. Embodiments may be used to filter cerebrospinal fluid (CSF) from a human or animal subject. In an example, CSF is separated into a permeate and retentate using a tangential flow filter. The retentate is filtered again and then returned to the subject with the permeate. During operation of the system, various parameters may be modified, such as flow rate and waste rate.

The present disclosure relates to the field of ceramic filtration membranes and methods for their preparation and use. In particular, the present disclosure relates to ceramic membranes prepared from SiC precursors comprising a mixture of two SiC powders each one with -SiC crystalline phase and another with -SiC crystalline phase and different particle sizes, respectively.

Algae harvesting and cultivating systems and methods for producing high concentrations of algae product with minimal energy. In an embodiment, a dead-end filtration system and method includes at least one tank and a plurality hollow fiber membranes positioned in the at least one tank. An algae medium is pulled through the hollow fiber membranes such that a retentate and a permeate are produced.

Systems and methods for filtering materials from biologic fluids are discussed. Embodiments may be used to filter cerebrospinal fluid (CSF) from a human or animal subject. The method may include the steps of withdrawing fluid comprising CSF, filtering the volume into permeate and retentate by passing the fluid through a tangential flow filter, and returning the permeate to the subject. During operation of the system, various parameters may be modified, such as flow rate.

Systems and methods for filtering materials from biologic fluids are discussed. Embodiments may be used to filter cerebrospinal fluid (CSF) from a human or animal subject. The method may include the steps of withdrawing fluid comprising CSF, filtering the volume into permeate and retentate by passing the fluid through a tangential flow filter, and returning the permeate to the subject. During operation of the system, various parameters may be modified, such as flow rate.

A system and method for concentrating and capturing target material from a fluid sample, comprising directing a fluid sample containing a target material into a prefiltration cartridge, wherein the prefiltration cartridge further includes at least one prefilter, wherein the at least one prefilter further includes a plurality of stacked individual filters of predetermined diameters and pore sizes; directing the fluid sample from the prefiltration cartridge to a capture cartridge, wherein the capture cartridge further includes a capture filter disposed therein; capturing the target material on the capture filter; eluting the target material from the capture filter; and collecting the eluted target material.

Separation membranes and filters include (a) a porous substrate with a surface having reactive functional groups; (b) a polymerization initiator chemically bonded to at least one surface of the porous substrate via reaction with the reactive functional groups on the surface of the substrate; and (c) a polymeric coating layer prepared by a radical polymerization process from an aqueous monomer composition comprising at least one free radical polymerizable monomer having at least one hydrophilic functional group, such as a (meth)acrylamide group. The polymeric coating layer is chemically bonded to and propagated from the polymerization initiator, and the polymeric coating layer demonstrates hydrophilicity, such as a water contact angle less than 10 degrees. Also provided are methods of separating an aqueous fluid stream using the described filters or membranes.

A production method for water for pure water includes adding polyaluminum chloride to raw water to produce first treated water, and filtering the first treated water in two or more stages including filtering with a filtration membrane device in a preceding stage to produce first concentrated water, and filtering the first concentrated water with a filtration membrane device in a subsequent stage. The water for pure water is produced as permeated water produced by the filtering in the two or more stages.