When did the clay filter originate.
Clay water filters in sri lanka.
Overview of ceramic water filters the clay water filters were first developed in 1981 by the central american research institute for industry in guatemala.
Cleaning these filters is the same as with the clay pot filter but also allows for reverse flow.
Below is a photograph of a 1 200 year old porous sandstone filter on display at the sri lanka national museum.
Water filtration for home use with porous clay and sandstone receptacles dates back hundreds of years in both central america and asia.
And ngos are supporting the expansion of the use of ceramic filters in drinking.
Currently the filters are one of the main income generators of the sri lanka red cross society.
With the finest of red clay from north western sri lanka crafted by the most able of hands perfected with technology built over three decades of experience we strive to deliver you the best earthenware products on the market.
After the filter is distributed in the community the water quality is tested using a bacteriological field testing kit during follow up visits.
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The american red cross began production of the clay filter in sri lanka in january 2007 and has distributed some 10 000 units so far benefitting an estimated 50 000 sri lankans.
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And countries in asia like nepal bangladesh cambodia sri lanka india vietnam etc.
Ceramic water filters cwf.