Abstract:
Embodiments described herein are directed to methods of manufacturing a multi-leaf membrane module for filtering product fluid flow (e.g., food products or wastewater) and such multi-leaf membrane modules. In an embodiment, a multi-leaf membrane module is disclosed. The multi-leaf membrane module includes a permeate fluid flow tube defining a permeate fluid flow channel for permeate, and a membrane sheet spirally wound about the permeate fluid flow tube. The membrane sheet includes two or more leaves. Each of the two or more leaves includes a feed spacer including at least one opening formed therein that at least partially defines a feed channel for product fluid flow therethrough and a permeate structure defining a permeate fluid flow channel. The permeate structure of each of the two or more leaves includes at least one membrane and at least one porous permeate spacer.
Abstract:
Described herein is a construction comprising (a) a support sheet having a base, comprising (i) a plurality of rails extending from the base wherein each rail of the plurality of rails extends continuously down a length of the support sheet and each rail comprises a first side surface and an opposing second side surface and a top surface; and (ii) a plurality of first protrusions extending from the base, wherein the plurality of first protrusions are located between the plurality of rails; and (b) a selectively permeable membrane having a first major membrane surface contacting at least the top surface of at least two rails enclosing a flow channel having a height extending between the base of the support sheet and the first major membrane surface, wherein the plurality of protrusions change the height of the flow channel along its length along the longitudinal axis of the flow channel.
Abstract:
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.
Abstract:
Provided is a spiral separation membrane element equipped with: a water collection pipe; a separation membrane which is wound around the periphery of the water collection pipe, which has a supply-side surface and a percolation-side surface, and which has a band-shaped region provided to at least one end of the supply-side surface in the length direction of the water collection pipe; and a flow path material which is thermally sealed to the band-shaped region.
Abstract:
The object of the invention is a laboratory cross-flow membrane filtration module. The module has a sandwich construction and has a two-part housing composed of two superposed plates ( 1 , 2 ) equipped with fixing means and inlet and outlet stub pipes, including two membranes ( 3 ) separated by a circumferential flat central gasket ( 4 ) having an inner profiled hole filled with a spacer 5 , forming the central feed chamber together with a membranes ( 3 ), and separated from the housing plate ( 1 , 2 ) with flat separating gaskets ( 6 ) having inner holes filled with the permeate spacer layer ( 7 ).
Abstract:
Anti-biofouling nanocomposite material at least partially loaded with copper or silver ions and methods for making same are disclosed. Metal affinity ligands are covalently bound to the polymers that are charged with the metal ions to allow for slow release of metals.
Abstract:
The production of hollow membranes (10) in which two support layers (12a, 12b) are arranged one above the other and supported by a plurality of capillary tubes (14), the assembly being formed by an organic polymer, has been optimized. In particular, since the material forming the assembly is polymerized in a number of polymerization steps (6i), the membrane has a structure close to that of organic systems, and forms capillary ducts (14) for the flow of a first fluid, the space between the capillary tubes (14) and the support layers (12) forming an internal cavity (16) for the flow of a second fluid. The membranes (10) thus produced can be assembled as fluid treatment modules with intermediate porous plates.
Abstract:
A spiral wound membrane filtration module is operated with a single pass through the feed side and without cross-flow on the permeate side. Recovery is 70% or more and feed side velocities are between 0.05 and 0.4 feet per second. The module may have dams in the spacer material on the shell/feed side to provide a feed path with multiple passes across the membrane leaves. A small-scale system for using such a module, for example to soften and filter water with a nanofiltration membrane, is described. The system includes a chemical cleaning apparatus and process. Multiple membrane materials can be used in order to adapt the module selectivity.