Clay-Combustible Ceramic Pot Water Filter¶
Ceramic Filtration • Est. CapEx: $21.50 USD • Lifespan: 10 Years (Standardized)
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 (CapEx) | $21.50 USD |
| Power / Energy | 100% Gravity / Zero Power |
| Target Scale | Household (5–10 people) |
| Standard Lifespan | 10 Years (Standardized) |
| Technology Maturity | Field Tested |
| 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. |
Engineering Trade-Offs¶
- ★
- I
- n
- c
- l
- u
- d
- e
- s
- s
- t
- e
- p
- -
- b
- y
- -
- s
- t
- e
- p
- D
- I
- Y
- c
- o
- n
- s
- t
- r
- u
- c
- t
- i
- o
- n
- g
- u
- i
- d
- e
- /
- m
- a
- n
- u
- a
- l
- f
- r
- o
- m
- P
- o
- t
- t
- e
- r
- s
- f
- o
- r
- P
- e
- a
- c
- e
- Requires periodic community maintenance
- Site-specific hydrogeological constraints
Cross-Reference & Interactive Tools¶
Need to evaluate this technology for your specific field site? Run the WhatWater.info Selector Engine to compare it against 100+ alternative solutions.