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MEMBRANE FILTRATION
In membrane filtration today, polymers like poly(ether)sulfones, polysiloxanes, and polyamides are the most common materials used to create the barrier and achieve the separation. Membranes with different pore sizes are available for different particles.
An overview of membrane filtration classification and the contaminants that can be removed by microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO):
| REMOVABLE PARTICLES | PORE SIZE | |
| MF | Pollen, Asbestos, Bacteria, Cells | 0.1 - 1 µm |
| UF | Virus, Colloidals, Emulsions, Turbidity | 5 - 100 nm |
| NF | Vitamins, Sugars, Colour | 1 - 5 nm |
| RO | Salts, small organic substances | 0.1 - 1 nm |
Separation in RO is achieved by applying a pressure on the contaminated solution that is higher than its osmotic pressure. This makes it possible to remove ions from water and, for example, desalinate seawater under pressures between 60 and 80 bar (870 to 1160 psi).
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RELATED PRODUCTS
The Compact 27 is a tubular 8 mm ultrafiltration membrane module, used in cross-flow mode to separate water from relatively high solids applications and produce high effluent quality.
The Compact 33V is a tubular 5.2 mm ultrafiltration membrane module for use in AirLift™ MBR process or in cross-flow installations, for separating oil and sludge from water.
The R30 membrane modules deliver a superior filtration method in the production of food & beverages, including beer, wine, cider and milk.
The Compact 33 is a tubular 5.2 mm ultrafiltration membrane used in cross-flow mode in MBR’s and other high solids applications, and for separating oil from water in produced water.
The Pentair X-Flow R100 microfiltration Membrane Element has been the chosen method of filtration for wines, wine must, juices, milk, vinegar and beer.
