Reverse Osmosis (RO)

Definition - What does Reverse Osmosis (RO) mean?

Reverse osmosis (RO) is a process that removes salt from seawater. It is a process where water is deionized or demineralized by pressurizing it via a semi-permeable membrane that selectively lets molecules or atoms pass through.

This process is used in treating wastewater, recycling and in the generation of energy, making it very significant in various industries.

Corrosionpedia explains Reverse Osmosis (RO)

Problems with water have been a tremendous global threat. Desalination plants implement reverse osmosis to solve vital water issues. For instance, areas surrounded by sea that are suitably arid and dry can get their drinking water through the aid of reverse osmosis plants.

In order to reverse the process of osmosis, energy is required for the highly saline solution. RO uses a semi-permeable membrane that admits the entry of water molecules, but not bacteria, organics and salts. However, there is a need to drive the water via the RO membrane with the aid of pressure higher than the natural osmotic pressure required for deionization or demineralization.

Through RO, pure water is obtained while eliminating most types of contaminants.

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