Ultrafiltration – 0,01 μm

Ultrafiltration is a filtering system by microporous membranes. These membranes are called “low pressure”, because of its transmembrane pressure that is around 0.2 to 2 bar.

For drinking water, ultrafiltration is characterized by a cutoff threshold of the order of 0.01 microns. All larger molecules are stopped (pollen, algae, parasites, bacteria, viruses, germs and large organic molecules), letting at the end a perfectly clarified and disinfected water, without using chemicals.

Reverse osmosis – 0,0001 μm

The membrane used in RO is a semipermeable membrane. It is composed of two filter layers. The principle is that water charged with salts, viruses, bacteria, organic matter … is injected through the membrane under high pressure, thanks to a pump. Under the effect of a difference of osmotic pressure, the water is filtered by the membrane, which make it drinkable. The impurities are rejected during this process by a sweeping flow.