We have been utilizing reverse osmosis membrane as the core technology for changing seawater into fresh water for over 40 years. We have been developing ideal desalination equipments that realize both ultimate efficiency and safety. |
Osmotic pressure Membranes allowing the passage of water are called “osmosis”membranes. Such membranes are found in nature, e.g., egg membranes and human skin. Cellulose acetate membranes were manufactured and commercialized some 40-50 years ago.These membranes, however, are not widely accepted due to poor chemical and physical resistance. The newest membraines are made of engineering plastics and are highly resistant to chemical and biological agents. |
Osmosis membrane When seawater and pure water are separated by a semipermeable membrane, the water flows in the direction towards the seawater(higher concentration)through the semipermeable membrane. This natural process is termed “osmosis.” Osmostic pressure is the force driving the pure water towards the seawater through the membrane, induced by the difference between concentrations of solution across the membrane. The pressure is as high as 24kg/cm². |
Reverse osmosis Revers osmosis is the forced passeage of water through a membrane against the natural osmotic pressure. This is accomplished by applying counterpressure against the osmostic pressure. A membrane for this purpose is called a “reverse osmosis(RO)”membrane. RO desalination units produce potable water from seawater under applied pressures of up to 55-68kg/cm².Desalination units incorporating membranes of the latest technology are now widely applied to the production of potable water from seawater, saline water, or water containing chemicals or other matter rendering it undrinkable. |
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