COMBINED PHYSICAL-CHEMICAL TREATMENT UNIT

摘要

PURPOSE: Disclosed is a combined physical-chemical wastewater treatment unit, more particularly in which flocculation is carried out in a chamber (5) packed with soft contact media after rapid mixing of wastewater with coagulant. CONSTITUTION: This unit comprises a rapid mixing tank (4) for contacting raw wastewater with coagulant to form floc; a chamber (5) in which fine floc is flocculated to denser compact floc while fine floc comes into collision each other and collides with soft contact media and thereby grown floc settles down to lower part; a settling tank (8) where unsettled grown floc is again settled down; an upflow type filter bed (10) for filtrating unsettled floc. Also, for washing clogged filter bed, air is injected into the filter bed with vibrating.