<prompt> Feature of slow filter w.r.t. fast filter isare:Occupies less spaceHighly skilled operationPoor bacterial qualityTakes more time for purification  <response>: Ans. is d i.e. Takes more time for purification o Slow sand filter occupies large area more space. o Slow and filter requires less skilled operation. o Slow sand filter removes more bacteria and has better bacterial control 99.9-99.99 o Slow sand filter requires longer duration for purification. o Size of sand is smaller 0.2-0.3 mm. 