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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).
If you have any questions, please contact us.
FILTRATION SPECTRUM
Learn all about our filtration spectrum on the filtration spectrum page.
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The X-Flow HFW1000 hollow fiber nanofiltration membranes provide superior removal of organic matter and color components in the treatment of surface water and WWTP effluent, with a limited reduction of bivalent salts.
The X-Flow R-100 microfiltration module has been the chosen method of filtration for wine, cider and grape juice.
The R-30 membrane modules deliver a superior filtration method in the production of food & beverages, including beer, wine, cider and milk.
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Seaflex membrane modules are known as the ultimate choice for the pretreatment stage in seawater SWRO systems, and are being applied in seawater desalination systems across the globe.
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