Reverse osmosis is a popular method of preferentially removing salt and other compounds from water. The process uses high pressure to force water through a semipermeable membrane, preserving high quality water while discarding salts, minerals and other contaminants as wastewater. This technology is often used in combination with other pre-treatment techniques such as coagulation or softening in order to maximize removal efficiency.

Reverse osmosis plants(RO Plant) use a process called reverse osmosis to remove salt, dirt and other impurities. RO Plant is also used to recover dissolved minerals from treated water. In short, RO Plant is the separation of salts and other minerals from water through a semi-permeable aluminosilicate membrane that allows pure water to pass through it while rejecting the contaminants.