The image depicts the process by which salt is removed from seawater and produces drinkable water.
Overall, there are four primary stages in the purification process, beginning with the intake of saltwater from the sea, which is inappropriate for drinking, and ending with the distribution of water to the supply system.
Starting at the sea, salt water is transported through pipes to the first stage.
Here, the saltwater passes through a pre-treatment filter. Following this, a portion of the water is sent to a backwash filter and returned to the sea. At this point, the remaining seawater is forced through a membrane at high pressure, and afterwards, the salt and other impurities are extracted. Then the seawater is concentrated and ultimately returned to the sea.
During the following step, the filtered water flows to the post-treatment stage, where lime, chlorine, and fluoride are added to improve the quality of water. The process ends with the treated it being stored in a reservoir before being distributed to the integrated to supply system of water.