1. Home
  2. Sandstone equipment
  3. slow and rapid sand filtration
slow and rapid sand filtration

Slow And Rapid Sand Filtration

rapid sand filtration pdf,rapid sand filters are cleaned often, usually daily, by reversing the flow of water through the entire filter bed, referred to as backwashing. slow sand filters are .difference between rapid sand filter and slow ,varies from 3 to 40 mm in size, and 60 to 90 cm in depth. back washing quantity required. no back washing required. top sand layer is replaced. 2 to 4 of .1.2.1 rapid sand filtration,a slow sand filter comprises approximately 1.2 m depth of fine sand supported on two or three gravel layers. it is a very simple and effective technique for purifying .an introduction to slow sand filtration,the use of sand and gravel as filter media for water supplies can me split into three basic filter types: slow sand filters, rapid filters and roughing filters. apart from .