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Concrete Biosand Filter

153 bytes added, 23:59, 14 May 2012

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__NOTOC__

[[Image:concrete biosand filter.png|thumb|right|250px| Bio Sand Filter in Kumbo, Cameroon. Photo: [http://www.lwdgc-africa.org/15.html LWDG Cameroon.]]]

[[Image:CAWST_Biosand.png|thumb|right|250px| Cross-section through a concrete biosand filter]]

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