'Biosand filters' diaporamas de présentation

The Rotary Foundation

The Rotary Foundation. A Presentation to the Rotary Club of Conifer By Curt Harris December 11, 2012. Rotary Foundation. Different from the Conifer Rotary Foundation PolioPlus 25 Years Over $1 billion Thousands of volunteers Grants. Matching Grants. Example:

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Biosand Filtration (BSF)

Biosand Filtration (BSF). FluiDivas: Lindsey Ehinger, Laura Mar, Stephanie Wedekind, Kim Wilson. How Biosand Filters Work. Bio-layer Organic material, living and dead, silt, clay, and particulates on filter bed. The thicker the layer, the more effective the filter.

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166 views • 10 slides