The diagram below shows a simple system that turns dirty water into clean water.

The diagram illustrates the process of turning dirty

water

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into clean

water

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by a simple system.

Overall

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, we can see that there are three steps to recycle dirty

water

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into clean

water

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, beginning with opening the lid of a filter plastic barrel and ending with filling clean

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into a glass. At the first step of the process, the lid of a

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-filter drum made from plastic is opened, dirty

water

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is

then

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passed into a

water

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-filter system which is a big plastic barrel involving a

layer

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of gravel at the bottom, next is a

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of charcoal, and

then

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a

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of sand, an empty part above which account for about half of the drum, where dirty

water

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is contained. The dirty

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will go through sand,

then

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charcoal, and gravel

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to be filtered. After being filtered, it is led to another storage drum by a long small pipe from the bottom of a

water

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filter. At that time the

water

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is ready for the consumer.