How can natural water be purified? What is sedimentation and filtration used for?

To purify natural oxen, the following steps are carried out:
-The water is allowed to settle in special pools and filtered through a layer of sand. At this stage, undissolved impurities are removed from the water.
-Treated with chlorine, ozone or ultraviolet rays to kill microorganisms.
-To purify from dissolved impurities, use distillation, or distillation,
-Aeration is also used – oxygenation.
It is used in cases when it is necessary to purify the water of metal compounds (mainly from iron) and dissolved gases (hydrogen sulfide, carbon dioxide, etc.). Oxygen also provides the vital functions of organisms that decompose dissolved organic matter and other compounds.

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