Charcoal filter / Activated carbon
Revision as of 01:12, 15 May 2012 by Winona (talk | contribs) (Created page with " The Unicef upflow charcoal filter. <br>Photo: WHO. ==Acknowledgements== * [http://www.who.int/water_sanitation_health/...")
Revision as of 01:12, 15 May 2012 by Winona (talk | contribs) (Created page with " The Unicef upflow charcoal filter. <br>Photo: WHO. ==Acknowledgements== * [http://www.who.int/water_sanitation_health/...")
File:Charcoal filter - biosand.jpg
The Unicef upflow charcoal filter.
Photo: WHO.
Photo: WHO.