BioSand Filters

BioSand Filter – Mold

Pouring the Filter Mold

Quarry Dust Sorted by Size

The Finished Product

The BioSand Water Filter is simple, low-cost and easy to manufacture anywhere in the world. The Recipe is very simple:

Cement (16 kg)
Various Sizes of Sand (32 kg)
2 Standard Sizes of Crushed Stones:
     –  12 mm (20 kg)
     –  6 mm (20 kg)
One mold for cement (purchased or home-made)
Margarine

Home-made Sieves for Sifting Sand

More information can be found at the CAWST website

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