Liquid filtration is a process in which particles and other substances above a defined size are removed from liquids.
The filters used for water treatment vary from system to system. The required purity of the end product plays an important role in the choice of filter type.
Filtration with so-called membrane-based filters is a key process for treating liquids, for example in wastewater treatment.
Membrane filtration is generally used when particle filtration alone is not sufficient for water reuse. Membrane filtration systems are often used when the highest water quality is required.
Common types of membrane filtration are reverse osmosis, ultrafiltration, microfiltration and nanofiltration.