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. |