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Since 1998, Potters for Peace has been assisting in the production worldwide of a low-tech, low-cost, colloidal silver-enhanced ceramic water purifier (CWP). Field experience and clinical test results have shown this filter to effectively eliminate approximately 99.88% of most water born disease agents.
It is a simple, pressed bucket shape 11” wide by 10” deep, made with a mix of local terra-cotta clay and sawdust or other combustible, such as rice husks. The simplest press utilizes a hand-operated hydraulic truck jack and two-piece aluminum mold.
After firing to about 860 deg. C. the filter is coated with colloidal silver. The combination of fine pore size, resulting from milled, screened materials, and the bactericidal properties of colloidal silver produce an effective filter.
A 1.5 to 2.5 liter per hour rate of filtration is determined by the combination of clay/combustible mix and firing temperature.
For use the fired, treated filter element is placed in a five gallon plastic or ceramic receptacle with a lid and faucet. Pricing for ready to use filter units is determined by local production costs and is usually between $15-25 with the basic plastic receptacle. Replacement filter elements will cost $4 to $6. A basic production facility with three or four workers can produce about fifty filters a day.
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