FILTER WASHING TYPE MULTI-STAGE WETLAND FILTER BED

摘要

The present invention relates to a multi-stage wetland filter bed. In forming a swirl flow for cleaning a lightweight filter (20) in a unit treatment tank (10) forming the wetland filter bed in treated water, only the lifting operation of a floating suppression plate, (40) which suppresses the floating of the lightweight filter (20) without complicated piping equipment, allows efficient water flow generation. Through the present invention, the simple generation of the swirl flow in the unit treatment tank (10) and the effective cleaning of the lightweight filter (20) accordingly are possible, and the cost of the formation and maintenance of the multi-stage wetland filter bed can be significantly reduced.;COPYRIGHT KIPO 2019