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Ceramic Water Filter

CWF Production Practices and Technology
by

Tyler Chester

on 28 April 2012

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Transcript of Ceramic Water Filter

Impact of dirty water... Ceramic Water Filter
Technology Low cost, low tech solution to water treatment
Cost between $20-25 each
Removes 98% of harmful bacteria
Production technology can be easily transferred to undeveloped areas fire ceramic water filters and other terra cotta clay products.
built with locally made bricks and a steel framework
1300 - 1800 F
use wood for fuel
50 filters per day Ceramic Water Filter (CWF) Mani Kiln: WHO/UNICEF Joint Monitoring Programme for Water Supply and Sanitation. “Progress on Sanitation and Drinking Water 2010.” Available at www.wssinfo.org/ Potters for Peace. Ceramic Filter Effectiveness. http://pottersforpeace.org/?page_id=9 http://s189535770.onlinehome.us/pottersforpeace/wp-content/uploads/colloidal-silver-mixing.pdf The Ceramic Filter Made from a mix of locally available materials: %60-75 clay and %40-25 saw dust, depending on material properties.
Press into form and let air dry
Bisque Fire at 1300 - 1800 F in kiln and let cool
Dip in colloidal silver or silver nitrate solution for 45 seconds, then let dry. (56 grams of 70% CS to 15 gal of water treats 400 filters) http://trendsupdates.com/potpaz-ceramic-water-filter-simple-and-functional/ http://inhabitat.com/ceramic-water-filters-win-iwa-award-for-cambodia/ 1. Surface sieving, like a screen door...

2. Trap contaminants within the walls very close to surface (127 microns or .127 mm).

3. Surface charge or adhesion, small contaminants cling to the walls with greater force than the water flow that might otherwise dislodge the contaminant. Filtering Properties of Ceramics The role of Silver Colloidal Silver or Silver Nitrate

silver reacts to deactivate certain enzymes in bacteria cutting respiration.
cellular membranes of bacteria is attracted to the silver causing the cells to increase in size, develop abnormalities, and result in the death of the cell. Tyler Chester
TEC 4606
17 April, 2012 As much of 80% of illnesses are linked to poor water and sanitation conditions
Nearly 1 out of every 5 deaths under the age of 5 worldwide is due to a water-related disease.
Nearly a billion, 884 million people do not have access to clean and safe water, 37% of those people live in Sub-Saharan Africa. E.coli destruction by CS Judging CWF Quality
A filter with maximum initial flow rate of 1.7 l/hr or less, consistently reduced total coliform bacteria by 99%. Opportunities? Technology transfer via NPOs and Aid Organizations

Distribution of detailed manuals to community leaders or regional universities

Volunteer site visits, managed implementation, quality assurance

Bulk aid or emergency disaster relief drop shipments Halem, D. Van. Ceramic silver-impregnanted pot filters for household drinking water treatment in developing countries: material characterization and performance study. Water Science & Tec: Water Supply. Vol 7, No 5-6. 2007. pp 9-17.

Lantagne, Daniele. Effect of production variables on microbiological removal in locally produced ceramic filters for household water treatment. International Journal of Environmental Health Research. Vol 20, No 3. June 2010. pp 171 - 187.

United Nations Development Programme. “Human Development Report 2006: Beyond Scarcity: Power, Poverty and the Global Water Crisis.” 2006. Available at http://hdr.undp.org/en/reports/global/hdr2006/

United Nations. Statement by Secretary General Koffi Annan. June 2003. http://www.un.org/News/Press/docs/2003/sgsm8707.doc.htm

WHO/UNICEF. “Diarrhoea: Why children are still dying and what can be done.” 2009. available at http://www.unicef.org/health/index_51412.html.

WHO/UNICEF Joint Monitoring Programme for Water Supply and Sanitation. “Progress on Sanitation and Drinking Water 2010.” Available at www.wssinfo.org/ Lantagne, Daniele. Effect of production variables on microbiological removal in locally produced ceramic filters for household water treatment. International Journal of Environmental Health Research. Vol 20, No 3. June 2010. pp 171 - 187. Works Cited The End as simple as measuring flow rate... Criticism flow too slow, not realistic source to meet the needs of a household (~2 liter/hr)

priced out of intended market by about $9.49 USD

ceramic element replacement every 2-3 years

pores clog and slow flow

ceramics are delicate (Any Questions?) Appropriate Technology at work... Ap gy How Ceramic Water Filters Work {} Filter Implementation Success and Challenges
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