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Membranes with a pore size of 0.1 – 10 µm perform microfiltration. Microfiltration membranes remove all bacteria. Only part of the viral contamination is caught up in the process, even though viruses are smaller than the pores of a micro filtration membrane. This is because viruses can attach themselves to a bacterial biofilm.

Microfiltration can be implemented in many different water treatment processes when particles with a diameter greater than 0.1 mm need to be removed from a liquid.

Examples of Microfiltration applications are:

  • Cold sterilisation of beverages and pharmaceuticals
  • Clearing of fruit juice, wines and beer
  • Separation of bacteria from water (biological wastewater treatment)
  • Effluent treatment
  • Separation of oil/ water emulsions
  • Pre-treatment of water for nanofiltration or Reverse Osmosis