How the BioSand Water Filter works – Samaritan’s Purse CANADA

The BioSand Water Filter is an adaptation of slow-sand filtration that is designed for use by families at the household level. This award-winning water filtration technology was developed by Dr. David Manz, a former University of Calgary professor. The filters are a proven, effective, and inexpensive technology. From start to finish the filters can be [...]

Source: Water Filter