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Plant & Reverese Osmosis

Reverse Osmosis is a membrane separation process which is capable of separating the dissolved salts (ions) present in the water and allows clean water molecules to pass through the membrane. In reality, it is the water molecules that are separated from the dissolved salts and not, as is known from ion exchange, the ions that are removed from the water. 

The dissolved salts are removed almost 100% and the pores of the membrane are so small that even micro-organisms like bacteria and pyrogens cannot penetrate. The treated water (the permeate) is collected in a reservoir tank and from here it will be pumped to the user installation. The reject water (the concentrate) will flow to drain. 

Reverse Osmosis is a membrane process where water is pumped at high pressure through a semi permeable membrane. The membrane pore structure is very fine and allows the passage of water whilst at the same time rejecting the dissolved salts. The Reverse Osmosis process will reduce the concentration of dissolved salts by up to 99% when new. The permeate (pure water) production rate is normally 70% to 75% of the feed flow with the concentrate (waste water) being 25% to 30%, these figures are based on a softened water feed.

The purity of the permeate depends on the quality of the feed water and the efficiency of any pre- treatment required. Most UK water are below 350ppm dissolved solids and typical water qualities produced will be in the range 10 to 30 μs/cm. The water quality is measured on the outlet by a conductivity monitor and this instrument can be linked to a dump valve to ensure out of specification water is diverted to drain. The purified water will need to be collected in a suitable treated water tank prior to being pumped to the process or further treatment. Reverse osmosis will also remove bacteria, pyrogens and yeast cells, however, to keep the water in this clean state further treatment may be required. The RO-2700 range includes PLC with HMI panel with trending and data logging capability.

Application

With years of experience we are able to solve and optimize various tasks involving reverse osmosis, e.g.

  • Autoclaves
  • Evaporators
  • Food industry
  • Chemical industry
  • Component washing
  • Printing houses
  • District heating plants
  • Nursery gardens
  • Cooling water
  • Waste water recovery
  • Car washing
  • Process water
  • Humidifiers
  • Laboratories
  • Boiler water and steam production