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Membrane Filtration Systems


In water treatment membrane filtration is the technique with the lowest operation costs used to remove particles and salts in the water. For this area, ProMinent offers multiple and high quality systems.

Membrane filtration is a physical procedure for particle separation by means of semi-permeable membranes. There are 4 types of technologies, depending on the size of the particles/molecules, that are to be removed:

  • microfiltration
  • ultrafiltration
  • nanofiltration
  • reverse osmosis
The following overview shows the limits to the technologies:
  Microfiltration Ultrafiltration Nanofiltration Reverse Osmosis
Size of Particle

> 0.1 µm
> 500 000 Da

0.1 - 0.01 µm
1 000 - 500 000 Da

0.01 - 0.001 µm
100 - 1 000 Da

< 0.001 µm
< 100 Da

Type of Particle

suspended particles,colloidal haze,oil emulsions

Macro molecules,bacteria, cells, viruses, proteins

Micro molecular organic compounds Ions

From these technologies ProMinent has specialized on plants for nanofiltration and reverse osmosis. ProMinent specialists with their detailled branch knowledge have not only the capacity to compile the optimal plant for the respective application but also provide complete water treatment solutions from one source consisting of products of the large ProMinent product range.
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