The present invention relates to systems and methods for filtration and/or dilution of fluids, in particular for the dialysis of blood. The systems comprise a filter device (10) having a fluid chamber (18) and comprising a first lid (20) having arranged thereon a first fluid port (22). The filter device (10) further comprises a second lid (30) having arranged thereon at least a second fluid port (32). The filter device (10) further comprises a plurality of hollow fibers (40) arranged within the housing (12), wherein each of the plurality of hollow fibers (40) comprises a semi-permeable membrane and defines a fluid channel extending longitudinally through an interior of the respective hollow fiber (40). Also, the filter device (10) comprises a fourth fluid port (50) and a fifth fluid port (52) both provided at the fluid chamber (18).

Systems and methods used to control tangential flow filtration are provided, including control systems and methods for use with connected systems with upstream processing units, such as chromatography processing units, in fluid communication with a tangential flow filtration processing unit. Also included are control systems and methods for performing continuous concentration using single-pass tangential flow filtration with permeate flow control.

A device (1) for purification of water driven by gravity through a purification unit between an upper dirt water container (2) and a lower clean water tank (3). A backwash system may be integrated, the system comprising a receptacle (8) for accumulation of the backwash water to prevent consumption thereof by mistake.

The reverse osmosis system with at least one high pressure pump, which supplies untreated water to at least one module pipe, in which a membrane with a permeate collecting pipe is arranged, includes a permeate outlet of the at least one module pipe that is connected by means of a first conduit to a permeate tank, which is in communication by means of a further conduit, connected into which there is a permeate supply pump, with a loop feed line, to which a plurality of dialysis devices are connected and that branching off from the first conduit there is a bypass conduit, which discharges into the further conduit downstream of the permeate tank and the permeate supply pump.

The invention provides an improvement in terms of control and process technology for a method of continuous removal of a component from a liquid mixture using a membrane unit comprising at least one membrane stage. The improvement is that a portion of the overall permeate stream is recycled to the feed vessel and/or beyond the feed vessel but upstream of the conveying device, and the remainder of the overall permeate stream is removed, with the recycled permeate having a higher concentration of the component to be separated off than the removed permeate. The presently disclosed method can especially be used for separation of a homogeneously dissolved catalyst from a liquid reaction mixture.

Methods and apparatuses for adding gas bubbles to a tank containing liquid at locations that allow the bubbles to rise to the top of the tank are disclosed. One embodiment comprises a membrane filtration system connected to a gas source and a drain. The membrane filtration system draws gas into the system from the gas in response to a reduced pressure profile created by opening a drain. The gas may be air supplied at atmospheric pressure.

An Atmospheric Storage Tank (AST) system designed to be an alternative to the existing RO pressure storage tank that operates on water pipeline pressure. It eliminates the disadvantage of subjecting the RO system to back pressure on the feed water which reduces the efficiency of the system and also has a higher probability of leakage. When the AST system is installed below the faucet, a pumping gadget is required to pump the water. It is primarily designed, although not exclusively, to be used together with a zero waste reverse osmosis system.

The present invention provides a method of deionization of a liquid including passing feedwater to be deionized through a deionization fuel cell system, which includes a deionization fuel cell (DFC), containing, inter alia, a cation exchange membrane and an anion exchange membrane and discharging the DFC to produce electricity and deionized liquid, wherein the method does not include a step of charging the fuel cell prior to or following the discharge step. Further provided are deionization fuel cell systems comprising a DFC comprising two or more membranes.

The present invention relates to a centrifugal force-based nanoparticle separation apparatus and method. Specifically, the present invention is based on having a low centrifugal force and a small size, and may thus separate nanovesicles unrelated to antibody specificity in a short time and without using an ultracentrifuge. Further, the present invention requires no additional professional personnel and enables accurate fluid measurement by integrating and automating all processes after sample injection, and may thus reduce the loss of nanovesicles.

A high recovery variable volume reverse osmosis system where the volume of concentrate cycled through the RO system is reduced in response to recovery levels increasing. By reducing the volume of concentrate cycled through the RO system, this reduces the cycle time of highly saturated concentrate passing through the RO system. Reducing the cycle time of concentrate passing through the RO system tends to minimize or reduce membrane scaling.