Cheapest
Material will give you Purest Rainwater
Sand bed filter is the traditional
method of water purification Systems.
In a confined masonry structure, coarse
riverbed sand, pebbles and aggregates are filled one above the other as layers separated by plastic
mesh.
Rainwater is allowed at the top from one
end and filtered water is drawn from the bottom at the other end.
Aggregates, sand and
plastic mesh need to be taken out of the filter chamber periodically. These are washed
in fresh water and sun dried before refilling them back in the filter chamber.
