The diagram below shows how salt is removed from the sea water to make it drinkable. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

The illustration shows how seawater is being treated to remove salt and impurities before entering the

water

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supply system.

Overall

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,

it is clear that

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this

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is a continuous cycle.

Moreover

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, there is a need for four chambers in

this

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process. Starting with the first two sections,

this

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is the pre-treatment filter chamber and the

membrane filled

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membrane-filled

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compartment. Saltwater from the sea flows into the filter chamber where it can either continue into the

membrance

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membrane

remembrance

compartment or return back into the sea. In the second chamber, the

water

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molecules are forced with high pressure through a membrane that helps remove impurities and salt. Afterwards, less concentrated

water

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moves to the next section

while

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the seawater concentrate is returned to the sea. Turning to the

last

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two chambers,

this

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includes the post-treatment zone and the storage area. Filtered

water

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from the membrane

are

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is

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treated with lime, chlorine, and fluoride in the third section to make them more suitable for drinking.

Next,

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the treated

water

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is stored at the storage area where it will later be integrated into the

water

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supply system.