Ceramic Water Filter Solutions has standardized a reliable method for manufacturing a ceramic filter that will produce affordable clean water and can be installed directly in the home, at the point of use, avoiding contamination in collection and transit. The filter is made by mixing a local clay with a combustible material like sawdust, then forming the container using a press and molds. The filter is then fired to approximately 860 degrees Centigrade. The sawdust burns out leaving small cracks and pores that are large enough to allow water to pass through but too small for bacteria and protozoa. An additional safeguard is the application of a small amount of colloidal silver both inside and outside of the filter.
To use it, one only needs to pour contaminated water in the top. It is a simple passive device, made locally of native materials, uses no electric, requires minimal maintenance and makes an immediate change in peoples’ lives.
The filter is made to fit into an ordinary 5 gallon plastic bucket fitted with a lid and a spigot, providing clean storage of bacteria-free water. When properly manufactured, then verified through testing, the filters will produce 99.9% bacteria free water.
Digging and Testing Clay
To begin the process, clay must be found in natural areas, preferably at sites of old or existing brickyards. A sufficient quantity must be dug to perform suitability tests and to make sample filters. The clay is then dried and crushed.
Sieving and Mixing Clay
The clay is sifted to a small particle size and mixed with a specific quantity of dried and sifted burnable material (sawdust, rice husks, etc.). The materials are mixed in their dried state, then water is added to form a homogeneous mix.
Pressing and Drying Filters
The mix is then pressed into molds to form the filter shape. The filters are then trimmed and given a unique number. They then must be slowly dried to avoid cracking.
Firing and Testing Filters
The dried filters are then fired in a kiln to a temperature approaching 900 degrees Centigrade. After firing the filters are soaked in water to test for leaks and then subjected to a flow test. The flow rate should be between one and three liters per hour.
The finished filters are coated with colloidal silver, subjected to microbiological testing, then placed into service inside a plastic container with a tap. In normal use the filters should prove effective at least 2 years.