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Filtration Process Nanofiltration
Filtration Process Nanofiltration
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The nanofiltration is a separation technique which uses membrane. Its application field is situated between the reverse osmosis’ and the ultrafiltration’s one. Moreover, this technique retains the bivalent salts and the 0.001µm molecules. It requires a working pressure between 10 and 25 bars. The use of this technique has increased in the past few years. Nowadays, it is most commonly used in the water purification processes such as the softening, the decolorisation and the elimination of micropollutants. In industry processes, the nanofiltration is used to eliminate specific components, like colouring agents for example. The nanofiltration is also used to extract vegetal products into aqueous or alcohol solutions. This technique enables to separate molecules according to their different sizes. The separation is made through membranes and thanks to the pressure. This technique is mostly used to eliminate organic substances such as micropollutants and polyvalent ions.
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