Build a Low-Tech Ceramic Water Filter: A Semi-Industrial Guide
This tutorial from the Low-Tech Lab explains how ceramic water filters work and how to produce them on a semi-industrial scale. It covers the role of clay, combustible materials, and colloidal silver, and outlines the step-by-step manufacturing process, from mixing raw materials to pressing, drying, firing, and testing. Aimed at entrepreneurs, it emphasizes the need for proper training and open-source resources.
The professor decided to freely bequeath this knowledge to Humanity, and began to train potters around the world to produce these filters locally with the NGO Potters for Peace.
- cassianoleal
Ceramic filters are very common in Brazil, used in clay recipients which also keep the water cool even in summer without spending energy.
https://g1.globo.com/saude/noticia/2026/03/14/filtro-de-barr...
- fastball
There is a company[1] in Indonesia that actually makes very nice versions of this tech.
- geokon
I wonder if you could achieve the same effect more easily/consistently using cement. It's basically how aquifers "filter" water. Limestone is naturally permeable unlike fired clay.. were you need to control the porosity. I'd imagine cement mixtures are much easier to handle and you can make arbitrary shapes (higher surface area and higher hydraulic pressure to increase the flow rate)
- ChrisMarshallNY
When I was a kid, we'd go camping, and we had these water filters that you would pump water through, and they would filter it.
It was ceramic, and I think it was the same idea, but we used a pump to force the water through (like a bicycle pump).
- notjes
Got hackernewsd