Potters Without Borders

Ceramic Pot Filters treat water borne disease.

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Research

Ongoing Projects:

To facilitate the development of targeted research in areas of engineering and biological effectivity we have begun to develop a listing of research abstracts.   For those involved in filter manufacturing and development these abstracts serve as a guide for determining relevant problems faced in the field. If you are a filter manufacturer, or researcher please consider joining the Facebook discussion group where troubleshooting and technical information is shared among others in the field.

Briquettes: Fuel sources for kilns continue to be an issue of concern, particularly where competition for firewood for other basic needs is acute. In a continued effort with Howell’s Railway Products of the UK and input from various international factories a briquetting machine is being developed to replace the use of wood with compressed pellets made from sawdust and other agricultural by-products.

Filter Press Design: In the first stages of factory implementation manually operated hydraulic filter presses are often used to begin modest production of 30-100 filters per day. These presses have undergone an incredible process of evolution as local knowledge, materials and skills have been used to apply basic design principals in locally appropriate ways. Because of this, their development has progressed in an uncoordinated way with widely variable results. In an effort to improve the basic filter press design, Potters Without Borders and the International Joint Filter Committee have begun a survey of filter press design and usage, with over 20 international factories participating.

Particle Analysis: Recognizing a raw clay source as appropriate for the production of filters is an important aspect of feasibility and development stages of filter production. Working on the hypothesis that these qualities are directly related to particle size distribution, we have begun a study testing clays from various international factories to develop an appropriate method of field analysis. It is hoped that using this data, clays from unreliable sources can be blended to produce a more consistent product. (See Latest Results Here)

Ware Stacking: By developing methods to nest filters inside each other during the firing process it is hoped to increase factory productivity. Stacking methods can increase per-load yields up to 30% thus reducing the amount of fuel and necessary per operation cycle. We are working on several prototypes of filter setter which utilize the same materials and mechanics necessary to form filters, keeping in mind appropriate design considerations.

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