| 摘要 |
PURPOSE: A rainwater storage device for reducing nonpoint pollution sources is provided to separate a precipitate by generating vortex in rainwater and to filter foreign materials from the rainwater with a filter unit, thereby storing clear rainwater. CONSTITUTION: A rainwater storage device for reducing nonpoint pollution sources comprises a rainwater supply part (200), a vortex unit (300), and a filter unit (400). The rainwater supply part supplies rainwater to be treated. The vortex unit generates vortex by guiding the flow of the rainwater supplied by the rainwater supply part. The vortex unit comprises a first vortex generating unit with a first passage; and a screen part installed in the first passage. The filter unit filters foreign materials from the rainwater passing the vortex unit. The filter unit comprises a second vortex generating unit with a second passage; and multiple filter members charged in the second passage. |
