Reverse osmosis (RO)

Pore size: < 0,001 µm (1nm)
illustration of reverse osmosis
RO removes virtually all salt and other impurities from sea water. This yields ion-modified water with extremely reduced content of salt.

Reverse osmosis (RO) is used for desalination of sea water, brackish water and salty groundwater. Reverse osmosis is proven technology for production of potable water from sea water and brackish water.

RO membranes are dense films, with pore sizes less than 1 nm (0.001 µm). Practically all dissolved solids are retained, what passes the membrane is based on solubility and diffusion in the membrane material itself. Pressure is the driving force for the separation, and in RO plants pressure from 30 to 85 bar must be applied.

RO can also be used to produce fresh water for land-based plants. With the help of RO, you can transform sea water to fresh water and be independent of a freshwater source on land.

Water quality fresh water from RO

Salinity: 0.3 ‰
NaCl: 200 mg/l
Ca2+: 4 mg/l
Mg2+: 3 mg/l
SO42-: <15 mg/l
Suspended solids, parasites, bacteria, virus: 0

Application areas:
Prevention and treatment of fish parasites.
Intake water for land-based aquaculture facilities.