Monthly Archives: August 2009

Cleaning (maintainence on) a (biological) slow sand filter

Posted on August 15, 2009 by Orpheus

A small biological sand filter (slow sand filter or Biosand filter) is maintained or cleaned by actively managing only the top 5 cm of sand. This top layer is either removed and replaced when the flow rate becomes unacceptable (typically … Continue reading →

Posted in slow sand water filter study and construction | 1 Comment