| 摘要 |
An ozone oxidation type wastewater treatment apparatus for reinforcing the pretreatment process is provided to increase efficiency of the pretreatment process by converting the turbulent flow into a laminar flow, thereby increasing the retention time when wastewater is flown in as a turbulent flow by a rectification chamber with a Korean hat-shaped top part and a cylindrical body part. In a wastewater treatment apparatus comprising a drain manhole(1), a screen tank, a wastewater supply tank, an ozone oxidation reaction tank, a dissolved air flotation system, a sludge collector, a pressure type filter, and a treated water tank, an ozone oxidation type wastewater treatment apparatus for reinforcing the pretreatment process is characterized in that the drain manhole comprises: a cylindrical tank(2) temporarily storing wastewater including rainwater; a lid(3) which is installed on a top part of the tank, and in which a screen mesh(3a) is formed to filter adulterations primarily; a pretreated wastewater inflow tank(4) which is formed in a cylindrical shape and vertically installed on a central portion of the bottom of the tank, which has a plurality of wastewater inflow holes(4a) formed in a middle portion thereof, and which has an overflow weir(4b) formed on a top part thereof; a rectification tank which includes a Korean hat-shaped part(6a) and a cylindrical part(6b), and which settles earth and sand(5) on the bottom of the tank by converting wastewater from a turbulent flow into a laminar flow, and guides treated wastewater to the wastewater inflow holes of the pretreated wastewater inflow tank; and a pretreated wastewater supply pipe(7) communicated with one side of the pretreated wastewater inflow tank and spaced from the bottom of the tank to supply pretreated wastewater to the screen tank. |
