Voir la source de Water - Biosand Filter

{{Tuto Details
|Type=Tutoriel
|Area=Eau
|Description=BioSand Filters are a field-tested, low-tech, household appliance that use sand, gravel and natural biological processes to filter out pathogens in water, making it safe to drink. 

OHorizons, a non-profit international coalition of innovators, has engineered an award-winning breakthrough in the production of concrete BioSand Filters, a Wood Mold, that can be made with 100% locally-sourced materials, tools, and labor, which reduces the financial and technical barriers to BioSand Filter production. The Construction Manual for this Mold is open-source and free to download at http://ohorizons.org/resources/ 

Including labor each Wood Mold costs between $70-100 and can make around 50 concrete filters in its lifespan. The total material costs for each BioSand Filter (concrete, sand, gravel, outlet tube, diffuser basin, lid, and a clean water storage container) are typically under $25. The filter can clean 44 liters of water per day and serve a family of five in their home for over twenty years if properly maintained. BioSand Filter Treatment Efficiency: Bacteria Up to 98.5%, Viruses 70 to >99%, Protozoa >99.9%, Helminthes Up to 100%, Turbidity 95% <1 NTU
|Difficulty=Moyen
|Cost=80
|Currency=USD ($)
|Duration=1
|Duration-type=jour(s)
|Licences=Attribution - Partage dans les Mêmes Conditions (CC BY-SA)
|Main_Picture=DIY_Wood_Mold_for_the_Production_of_Concrete_BioSand_Filters_Parts_of_a_BioSand_Filter.jpg
}}
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{{Tuto Step
|Step_Title=Wood Mold Construction Manual and Appendix
|Step_Content=The Wood Mold Construction Manual and Appendix are open-source and free to download at http://ohorizons.org/resources/
}}
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