Reverse Osmosis



Reverse osmosis softening systems:

  •         Planning
  •       Construction
  •         Installation
  •       Ongoing preventive maintenance
  •         and repair






?What is Reverse Osmosis


Reverse Osmosis is a water softening technology (the removal of hardness ions from aqueous solutions) by streaming water through membranes against the concentration gradient i.e. the water passes from a solution high in salts to a solution low in salts.

In this way also soluble organic compounds and other insoluble particles are removed.

The Reverse Osmosis membrane is madeout of layers of polymeric membranes with very small pores.  By applying external mechanical pressure, aimed at overcoming the osmotic pressure gradient of the aqueous solutions.

The water is forced to pass through the membrane wall, from the concentrated solution to the less concentrated one on the other side of the membrane thereby producing demineralized water on one side and very concentrated brine on the other.



In reverse osmosis there is also the parameter of "return ratio"

The return ratio relates to the percentage of water becoming a product (demineralized water).

In large systems the common return ratio is around 75% and 25% of the intake water is drained to the sewage.

At Markit we can produce and install systems integrating between the green softener (as preliminary treatment) and reverse osmosisto provide a return ratio of 90%.