A disc tube reverse osmosis module is provided. In various embodiments, deflector disc assemblies and associated membranes are sequentially alternately disposed from top to bottom. The upper flange is in sealing connection with the central pull rod, the upper lock nut is in threaded connection with an upper end of the central pull rod and located above the upper flange, the yielding water collecting pipe sleeves the central pull rod and is in sealing connection with a lower side of the lower flange, the lower lock nut is in threaded connection with a lower end of the central pull rod, an end of the yielding water receiving pipe is fixedly connected to the yielding water collecting pipe, an inner surface of the shell is respectively in sealing connection with the upper flange and the lower flange, and the water inlet receiving pipe and the concentrated liquid receiving pipe are fixed to the lower flange.

A humidifier comprises hollow shell and humidifier core. The humidifier core includes a transfer sheet, a plurality of first channels, and a plurality of second channels. The transfer sheet comprises a permeable material having a plurality of sections and a plurality of layers of spacing materials. The plurality of first channels are configured to allow air flow in a first direction and to prevent airflow in a second direction that is different from the first direction. The plurality of second channels are configured to allow air flow in the second direction and to prevent airflow in the first direction. The humidifier comprises a stack of alternating first channels and second channels, and the first channels are configured to transfer liquid from air flowing in at least one of the first channels to air flowing in at least one of the second channels. The humidifier is suitable for use in fuel cell stack.

A bipolar electrodialysis (BPED) cell is able to bipolar convert salt solutions into acid and base solutions. However, protons migrate through the anion exchange membranes and tend to neutralize the base solution. In a bipolar electrodialysis system described herein, multiple BPED cells are arranged to provide a multi-stage treatment system. Up to half, or up to one third, of the stages have cells with acid block anion membranes. The one or more stages with acid block anion membranes are located at the acid product output end of the system, where the acid concentration in the system is the highest. Replacing the traditional anion membranes in some of the stages with acid block anion membranes allows higher concentration products to be produced with moderate increase in energy consumption.

Provided are a plate-type filter module for water treatment and a filter assembly for water treatment comprising the same. The plate-type filter module for water treatment according to one embodiment of the present invention comprises: a plurality of filter units having a predetermined area and formed in a plate shape; a block frame to which the plurality of filter units is engaged so that the filter units are kept parallel to each other; and a collecting/receiving tube fixed on one side of the block frame and including a plurality of first fittings respectively connected to the plurality of the filter units to allow filtered water produced in the filter units to be introduced thereinto and at least one second fitting for discharging the filtered water introduced through the plurality of first fittings to the outside.

A membrane device is presented that can used for a wide range of applications from once-through filtration, crossflow filtration, molecular separation, gas/liquid absorption or reaction, gas dispersion into liquid, and degassing of liquid. The device comprises a thin flat sheet membrane that allows certain fluid or molecules go through while blocking others. The membrane sheet is fixed on a supporting structure with mini channel on two sides of the membrane for respective feed and sweep flows. The membrane sheet is sealed with gaskets with two cover plates that the membrane sheet can be replaced or cleaned. The cover plate provides connection ports to connect the feed fluid to the feed channels on one membrane surface and to connect the sweep fluid to the sweep channels on the other surface of the membrane.

A filtration cassette including a multilaminate array of sheets including filter sheets alternating with permeate sheet members and retentate sheet members, and a cross-flow filter device comprising a multiplicity of stacked filtration cassettes of such type. The improvements associated with the filtration cassettes described herein include, but are not limited to, at least one of: reinforced inlet(s) providing for longevity and improved cleanability of the cassettes; spacer permeate screens to limit throughput restriction; stainless steel or otherwise stiffened permeate sheets to prevent movement and increase flux; and stainless steel permeate sheets that can be used with ultrasonic transmission to minimize fouling of the filter sheets and extend cleaning cycles. Advantageously, the filtration cassettes are more resistant to higher temperatures than the filtration cassettes of the prior art.

The invention relates to a cross flow filtration unit, which provides a planar, rigid filter plate for filtration of liquid media, said plate having a planar membrane, which is fluid tight bonded at its edges to the surface of a partly hollow supporting plate comprising exit openings, internal flow channels, and flow areas for a first liquid medium, and the membrane being in fluid contact with said first liquid medium at its internal surface and being in fluid contact with a second liquid medium at its external surface.

Membrane cell stack arrangement comprising a housing, a stack of membranes defining flow compartments and a fluid manifold system, wherein the direction of flow through the flow compartments is different to the direction of flow through entry and exit openings and the width of the entry and exit openings are each larger than 45% of the width of the flow compartment.

A humidifier comprises hollow shell and humidifier core. The humidifier core includes a transfer sheet, a plurality of first channels, and a plurality of second channels. The transfer sheet comprises a permeable material having a plurality of sections and a plurality of layers of spacing materials. The plurality of first channels are configured to allow air flow in a first direction and to prevent airflow in a second direction that is different from the first direction. The plurality of second channels are configured to allow air flow in the second direction and to prevent airflow in the first direction. The humidifier comprises a stack of alternating first channels and second channels, and the first channels are configured to transfer liquid from air flowing in at least one of the first channels to air flowing in at least one of the second channels. The humidifier is suitable for use in fuel cell stack.

The present invention relates to modification to permeate channels and permeate materials in a cross-flow filtration system to improve performance in counter current filtration having both retentate channels and permeate channels wherein a solution is pumped through one of the channels and drawn through a membrane to one of the other channels to assist in positive pressure driven filtration by using the osmotic pressure, concentration, or preferential solubility difference between the retentate and permeate flow streams thereby increasing or altering the flux through the membrane separating the flow streams.