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.

A module comprises a cell stack having a plurality of alternating ion depleting compartments and ion concentrating compartments, an inlet manifold configured to facilitate a flow of fluid into the cell stack, and a first flow distribution system, associated with the inlet manifold, including a first ramp to promote the circulation of the flow of fluid into the cell stack.

Provided is a water-treatment filter module, an apparatus and a method for manufacturing a helical strand for a water-treatment filter module, and a method for manufacturing a spacer. Also provided is a water-treatment filter module comprising a membrane for filtering raw water, and a spacer laminated to the membrane and providing a plurality of passages for passing the raw water through to the membrane, wherein the spacer includes a first member extending in a first direction and a second member extending in a second direction that is different from the first direction and disposed so as to form spacer cells by intersecting with the first member, and at least one of the first member and the second member is wound in a spiral shape having a predetermined pitch of a predetermined radius around a central axis.

A filtration system suitable for recovering base stock from used lubricating oil and other applications passes feedstock over nano-filtration membranes in a serpentine flow. Pressure boosters installed in the openings separating consecutive stacks serve to restore lost pressure of the feedstock. As pretreatment a knocking non-blinding filter separates particulates from a feedstock by a knocking action that dislodges particulate matter which has come to rest on the screen. Further pretreatment includes a vacuum evaporator for flash evaporation of volatile components from a liquid and effecting the extraction of water and glycol from used engine lubricating oil. The liquid is heated or cooled when flowing over some of the surfaces to adjust for heat lost or acquired during exposure of the liquid surface to a gas or vacuum. Liquid moves on the surface of the discs under centrifugal force or a wiper blade guides the liquid as it moves over the support surface.

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.

The present disclosure generally relates to a method of manufacturing a spiral sheet product via an additive manufacturing process, the method comprising: obtaining an electronic file representing a geometry of the spiral sheet product; and controlling an additive manufacturing apparatus to manufacture, via the additive manufacturing process, the spiral sheet product according to the geometry specified in the electronic file. The geometry of the spiral sheet product comprises: a geometric model of a spiral body revolving around a longitudinal axis, the spiral body comprising spiral sections repeating along the longitudinal axis; each spiral section comprising unit cells repeating along a spiral length of the spiral section; and each unit cell comprising a geometric pattern, such that the repetitive geometric pattern functionalizes the spiral sheet product that is arrangeable into a flat sheet product that is larger than a build chamber of the additive manufacturing apparatus.

A disposable cell enrichment kit includes a crossflow filtration device configured to be disposed along a main loop pathway and to receive a process volume containing a biological sample and utilize crossflow filtration, via a micro-porous membrane, to retain a specific cell population in a retentate from the process volume and to remove a permeate including certain biological components from the process volume. The crossflow filtration device includes a laminated filtration unit that includes the micro-porous membrane, a first mating portion, a second mating portion, and a membrane support. The membrane support includes a first plurality of structural features that define a first plurality of openings, wherein the first plurality of structural features are coupled to the micro-porous membrane and provide support to the micro-porous membrane, and the first plurality of openings allow the permeate to flow through them after crossing the micro-porous membrane.

A spiral wound membrane module adapted for hyperfiltration and including at least one membrane envelope and feed spacer sheet wound about a central permeate tube to form an inlet and outlet scroll face and an outer periphery, wherein the feed spacer sheet includes: i) a feed entrance section extending along the permeate collection tube from the inlet scroll face toward the outlet scroll face, ii) a feed exit section extending along the outer periphery from the outlet scroll face toward the inlet scroll face, and iii) a central feed section located between the feed entrance section and the feed exit section; and wherein the feed entrance section has a median resistance to flow in a direction parallel to the permeate collection tube that is less than 25% of the median resistance to flow of the central feed section in a direction perpendicular to the permeate collection tube.

Embodiments of the present invention provide for the deposition of spacing elements for spiral wound elements which promote mixing within the feed space during element operation thereby improving element performance and reducing concentration polarization and potential for biological fouling.

Cassettes for tangential flow filtration (TFF) are disclosed which reduce assembly and disassembly required for aseptic filtration. Packaging systems and methods for the TFF cassettes are also disclosed.