CONTACT AERATION TYPE COMBINED WASTEWATER TREATMENT TANK

摘要

PURPOSE: Provided is a contact aeration type combined wastewater treatment tank, which has long sewage passage to increase oxygen transfer rate into sewage. CONSTITUTION: A contact aeration type combined wastewater treatment tank comprises: an outermost tank(1) in which sewage introduced through an inlet port(1') passes a screen(4), a flow equalization tank, a flow meter(6), a first contact aeration chamber(10), a second contact aeration chamber(8); a middle tank(2) in which sewage flow through a third contact aeration chamber(9) connected to a second contact aeration chamber, a fourth contact aeration chamber(10), a sludge trough(11); and an inner tank(3) connected to the sludge trough(11) through a connection port to discharge purified sewage into a final clarifier(12).