Reverse osmosis

Operating principle

Reverse osmosis is a separative process allowing the extraction of pure water from a salt solution by diffusion through a thick film membrane.
A pretreatment is necessary to avoid fouling phenomena due to suspended solids or chemical scaling.
That pretreatment includes two stages: fine filtration and softening or chemical treatment of the water to be deionized. The water then feeds the reverse osmosis unit at a pressure of about 16 to 20 bars to produce 75 % demineralized water and 25 % brine that will be rejected into the natural environment without any special treatment.
A deionized water buffer storage tank will allow the optimization of the reverse osmosis unit size and its daily working time.

 

Reverse osmosis

Reverse osmosis

Advantages

  • Continuous process
  • Automatic, easy and reliable operation
  • Compact installation
  • No liquid wastes to be treated