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The image depicts a diagram titled "A simple outdoor filling and storage system," illustrating a water filtration and storage setup. The system includes a cross-section filter at the top comprising a sand filter, tiny stones, and pipe holes, connected to a 200L metal container labeled inlet. The filtered water flows from the outlet into a storage system for untreated water, featuring a tap for dispensing. The diagram presents the flow of water from collection through filtration to storage, eventually designated for household use, demonstrating a basic infrastructure for managing and utilizing water supplies in a simplified schematic form. No numerical data points or percentages other than the 200L capacity of the metal container are provided in the image.
Given the complexity of the image, the above description may not be entirely accurate.
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The given process compares the steps of puritying water by two types of tilter systems. It is clear from the graph that the basic principle of purifying water in both systems is filtration.
In the first system there is a 200 litre water container which has an inlet on the top through which dirty water is sent in. The top one third has sand to filter the water. Below the sand are tiny stones and below the layer of stones are pipes with holes. After passing through the three layers the water which comes out is pure and fit for drinking.
The second system is a bit more advanced. The untreated water is stored in a container, which has a tap and from that container the water is sent to another container with sand. After being filtered through the sand the water is again stored in another container with a tap from which the water is finally used for household purposes.
So, it can be seen that water can be purified for household use using a very simple and inexpensive method of filtration.
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