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Tuesday, July 27, 2010

Bio sand Water filtration and Purification

This particular method uses a bio film that’s created in the sand to destroy dangerous pathogens like bacteria and other water borne illnesses. Filters of this type are very easy to make, are low cost and have been successfully used in third world countries where water quality is poor. Many people here in the states are using these filters to purify various sources of water, particularly rain water.

While all may seem well, there are still precautions to take. Special attention must be given to the type of sand used, where it came from, and making sure the sand is free of contaminants like arsenic. Care must be given to allow proper contact time between air and water to allow the bio film to develop on the top layer. I came across a website that goes into detail on building a good solid bio sand filter. Check it out here.


  1. wow, I couldn't imagine this before that rain water can be drink. Nice best water filters.

  2. Hello Friends,

    Lots of good information in your posting. Biosand filters are a point of use filtration system, developed from slow sand filters, which remove pathogens and suspended solids from water. I would like to tweet your blog post to visit again in the near future.

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