biosand filter

A biosand filter is a water purification device that removes contaminants naturally. It’s a jar-shaped container filled with specially layered sand and gravel. As water passes through, physical filtration traps debris, while beneficial microorganisms on the sand’s surface consume harmful bacteria and viruses. The filter is effective, low-cost, and requires minimal maintenance, making it ideal for communities lacking access to clean water. Over time, a biofilm develops, enhancing the filter’s ability to improve water quality, providing safe drinking water in an environmentally sustainable way.