Clay-Combustible Ceramic Pot Water Filter¶
Ceramic Filtration • Est. CapEx: Low-cost / Locally fabricated
Technical Overview¶
A point-of-use gravity water purifier constructed from local terracotta clay mixed with a combustible organic burnout material—such as sawdust, rice husks, or coffee grounds—formed into a frustum-shaped pot and kiln-fired to create a porous ceramic matrix. Designed for off-grid households and developing communities, it removes 99.9%+ of bacteria and protozoa and can be manufactured using locally available materials and artisan skills.
Key Specifications & Engineering Parameters¶
| Parameter | Specification |
|---|---|
| Category | Ceramic Filtration |
| Capital Cost | Low-cost / Locally fabricated |
| Primary Mechanism | During high-temperature firing (900–1000°C / 1650–1830°F), the organic burnout material combusts completely, leaving behind an interconnected network of microscopic pores (0.6–3.0 microns) throughout the ceramic body. Water percolates through these pores via gravity; pathogens, cysts, and suspended solids are physically trapped because they exceed the pore throat size. A post-firing colloidal silver treatment (20–50 ppm) adsorbs to the internal pore surfaces, providing a secondary bactericidal mechanism by disrupting microbial cell membranes and preventing biofilm growth. |
| Target Scale | Household / Village Cluster |
| Standard Lifespan | 10 - 20 Years |
Engineering Trade-Offs¶
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- Requires periodic community maintenance
- Site-specific hydrogeological constraints
Cross-Reference & Interactive Tools¶
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