Monthly Archives: May 2011

Concrete block cistern

Posted on May 17, 2011 by Orpheus

Roof water harvesting is a good idea, but how does one store the water? A large container can be quite expensive and may require considerable space; and water is very, very heavy. If the container is to be above ground … Continue reading →

Posted in slow sand water filter study and construction | 2 Comments

Science, observations, experiments, results, peer review and the internet

Posted on May 5, 2011 by Orpheus

Biological sand water filters (otherwise known as slow sand filters) are becoming popular. To all those people who have put up YouTube videos claiming to have built a slow sand filter that can be backwashed by forcing water into the … Continue reading →

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