What is nanofiltration?



Nanofiltration is a filtration process using a nanoporous membrane that is used in waters with low total dissolved solids. The purpose is to remove the polyvalent ions, as well as to disinfect it by retaining organic matter.

How does these systems work?

Nanofiltration is a cross-flow filtration technology. The pore size of the membrane is approximately 1 nm, and the pressure to use it (75 psi) is less than that of reverse osmosis (150 psi).

The biggest drawback this system can have, is that, it lets in the monovalent ions.

The nanofiltration process is capable of lowering the concentration of total dissolved solids, although by less than the RO (reverse osmosis).

Nanofiltration can be used in various applications such as:

  • Medicine manufacturing.
  • Dairy production.
  • Textiles.
  • Industrial kitchens.
  • Drinking water.
  • Medical Laboratory Water.

Sorting by particle size

  • Filtration of particles: from 1 to 1000 microns.
  • Microfiltration: 0.1 to 1 micron
  • Ultrafiltration: from 0.01 to 0.1 micron.
  • Nanofiltration: from 0.01 to 0.001 microns.
  • Reverse osmosis (Hyperfiltration): from 0.001 to 0.0001 microns.