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History of Reverse Osmosis

The natural process known as osmosis was first discovered back in 1748 by Jean-Antoine Nollet, a French clergyman and physicist. In his experiments, Nollet used a pig’s bladder as a membrane to show that solvent molecules from low solute water could flow through the bladder wall into a higher solute concentration made of alcohol. Thus, he became the first person to demonstrate the process by which a solvent can pass selectively through a semi-permeable membrane through the process of natural osmotic pressure.


Water treatment with (reverse) osmosis plants

Reverse osmosis is a physical process of membrane technology for the concentration of substances dissolved in liquids, in which pressure is used to reverse the natural osmosis process.

 


Water treatment semipermeable membrane, (reverse) osmosis

In the simplest definition, a semipermeable membrane is said to exist when the membrane allows the solvent, but not the solute, to pass through. More generally, only molecules below a certain molar mass or colloids or particles below a certain size are allowed to pass through.