The diagram below shows how salt is removed from seawater to make it drinkable. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
The diagram illustrates the processing of saltwater into potable water. This process involves a series of stages, and each of these stages removes salt concentrate from the seawater so as to make water drinkable.
Separation starts with the movement of water from the sea into a pre-treatment tank, where saltwater goes through filtration. The Impurities move back to the sea via filter backwash while the filtered water is forced through the membrane at high pressure into the post-treatment tank, in which the water is treated with lime, chlorine, and fluoride.
Treated water is reserved in the storage tank and then supplied into an integrated water supply system inside which water is further filtered and supplied to circulation for drinking. Also, water enters into this system from the membrane.
In addition, seawater concentrate from Pre treatment filter and membrane filtration returns back to the sea.
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