Clay pot filter
A clay pot filter is an adapted technological development that is intended to enable people in extremely structurally weak areas to treat water. It's an idea developed by materials scientist Tony Flynn of the Australian National University .
Manufacturing
Here, finely grated, unfired clay is mixed with fine organic material such as tea leaves, coffee grounds or rice husks and made kneadable with a little water. After a suitable vessel has been formed out of it, it is left to dry and wrapped in straw and cow dung before burning in fire.
development
The technology was developed in a World Vision project in Manatuto , East Timor . The local clay turned out to be too fine to produce a corresponding ceramic filter membrane with sufficient flow rates at low pressure (filling level of the vessel). Therefore, organic components were added to achieve a higher porosity. The pores that could be created in this way were able to reduce E-coli bacteria by 96.4 to 99.8 percent.
Individual evidence
- ^ New filter promises clean water for millions . ANU, 2005 (Description of the manufacture of a clay pot filter, English, PDF; 174 kB)
- ^ New filter promises clean water for millions