| 摘要 |
PURPOSE: A drainage treatment device enable to replace a filter unit for a bridge and a method of changing the filter unit are provided to remove a non-point pollution source by using a filter while raining and to maintain a purification facility more efficiently by partially replacing the filter. CONSTITUTION: A drainage treatment device enable to replace a filter unit comprises a housing unit(110) and a filter unit(120). The housing unit is installed in the lower part of a bridge slab and formed into a casing of a square in which top is opened or a circular shape. The housing unit comprises a bottom plate(111), a vertical frame(112), a side plat frame, and a rubber pad. The filter unit is installed in the rubber pad to be separated. |
