Ultrafiltration is a membrane filtration. Depending on the separation limit / pore width of the membrane, particulate water constituents can thus be removed from the water with high efficiency. Due to the screening effect, the particles are retained by the membrane while the water passes through the membrane.
In ultrafiltration, membranes with a pore width of about 10-50 nm are used and an operating pressure of about 0.1 – 2 bar is established. Ultrafiltration can be used to retain particles, high molecular solutes, bacteria and viruses. Low-molecular dissolved substances and ions, on the other hand, can pass through the ultrafiltration membrane.


  • Drinking water treatment: removal of turbidity, bacteria and viruses
  • Process water treatment: Recycling of waste water and industrial water
  • Ultrapure water treatment: removal of particles and pyrogens
  • Pre-filtration before reverse osmosis systems for seawater treatment
  • Wastewater technology: Treatment of oil-containing emulsions