Seawater Desalination
It is a membrane separation and desalination method, which was used only in 1953. This method uses a semi permeable membrane that only allows the penetration of solvent and does not allow the penetration of solute to separate seawater from fresh water. Under normal circumstances, fresh water diffuses to the seawater side through the semi permeable membrane, so that the liquid level on the seawater side gradually rises and does not stop until a certain height. This process is infiltration. At this time, the static pressure of the water column above the sea side is called osmotic pressure.