Reverse Osmosis

In reverse osmosis (RO) seawater is forced at high pressure (to overcome the osmotic pressure) through a semi-permeable membrane. The membrane works like a filter, only allowing certain atoms and molecules through. The process makes it possible to separate the water from the dissolved materials. The membrane filter retains solids, bacteria, viruses, lime and, for instance, heavy metals.

 

The osmotic pressure rises as the salt concentration increases, so at some point the process comes to an end. The concentrate must therefore be taken away. Our drinking water supply installations can be fitted with additional preliminary filters according to what kinds of substances are present in the water. Solids with a particle size down to 20 micrometres can be separated in this way. It is also possible to follow the purification with UV irradiation, providing an additional level of protection against germs.

 

Summary:

• Reverse osmosis for seawater desalination is today's state-of-the art technology

• Effective pre-treatment lengthens the service life of the membranes, minimising cleaning and filter exchange costs

• Shock disinfection prevents biological growth

• Low filter speed (< 15 m / h) and special filter material (garnet)

• The permeate flow is not interrupted during back-washing of the multimedia filter

• Triton-Evac offers optional turbochargers and/or pressure exchangers as energy recovery installations

• Full permeate performance over water temperature range from 5 °C to 32 °C

• Many references for marine (new construction and retrofitting), hotel and island installations

• Triton-Evac is the world's market leader for seawater desalination for cruise ships using reverse osmosis

Reverse Osmosis Plants