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Biosand Filter

After receiving a training from expert of the Centre for Affordable Water and sanitation Technology ACREST staff have started manufacturing biosand filters for safe water

Our first filter

How the filter works

The mold of a biosand filter

Testing of the first biosand filters made by ACREST

Construction in progress

ACREST produces 2 biosand filters per day.


Other biosand filter www.cawst.org

The Need
There is an undeniable need for clean water throughout the developing world.

Every year there are over a million deaths related to unsafe water, sanitation and hygiene,mainly through infectious diarrhea.
Over 1.1 billion people lack access to clean water and even more lack access to proper rootrsanitation.

The BioSand Filter

The BioSand filter is one of several household water treatment technology options.
Household water treatment is important to ensure an improved quality of water, because it allows for the water to be treated at
the ‘point of use’.

The BioSand filter is an innovation on traditional slow sand water filters. It allows for intermittent operation at a household level.
The filter can be constructed locally anywhere in the world because it is built using materials that are readily available. It is simply a concrete container, enclosing layers of sand and gravel whose purpose is to eliminate sediments,pathogens and other impurities from the water.

The BioSand Filter is proven to almost entirely remove the disease-causing organisms found in water. It removes 100% of parasites
and over 95% of bacteria. It also removes nearly all suspended sediments, and is capable of removing significant amounts of organic
and some inorganic compounds.

The BioSand filter allows for a sufficient amount of water to be treated for drinking,personal hygiene and cleaning purposes.