BSF Video (Africa, En) - Ch.3 - How the biosand filter works

This animated instructional video is one of 9 videos in a series on the operation and maintenance of the biosand filter. The videos have been designed to educate end users of the filter and as a resource for organizations distributing the filter. The "no words" version can be used to dub the videos into a local language. You can download a mobile or desktop app with all of the videos at www.cawst.org/bsfvideos. These videos have been produced by CAWST.