| 摘要 |
PURPOSE: A nonpoint pollution reduction facility is provided to maximize the removal efficiency of a contaminant by repetitively filtering the contaminant, thereby preserving peripheral waters and reducing the load of a sewage disposal plant. CONSTITUTION: A nonpoint pollution reduction facility includes a first pollution reduction unit(200), a second pollution reduction unit(300), a bypass pipe(500), a third pollution reduction unit(600), and a treatment tank(700). The first pollution reduction unit is connected with an inflow pipe(100) and provided with a screen(240) and a filter unit(250). The second pollution reduction unit is positioned adjacently the first pollution reduction unit and provided with a water collecting filter unit(400) absorbing the rainwater filtered by the first pollution reduction unit. The bypass pipe is positioned on the upper part of the water collecting filter unit and used as a passage for the rainwater inflowing to the first pollution reduction unit to be transferred to the third pollution reduction unit. The second pollution reduction unit is composed of a filter(620) for the rainwater with a reduced pollutant flowing from the second pollution reduction unit to have a pollutant reduced again. The treatment tank is positioned adjacently to the third pollution reduction unit, and connected to a discharge pipe(800) to discharge the rainwater to the outside. |
