NON-POINT SOURCE CONTAMINANT TREATMENT DEVICE

摘要

The present invention relates to a non-point pollution treatment device and, more specifically, to a non-point pollution treatment device to separate and purify initial rainwater containing a large amount of non-point pollutants in a rainfall. The non-point pollution treatment device comprises: a settling tank in which a wastewater inflow pipe is installed; and a filtering tank separated from the settling tank by a barrier wall and communicated with the settling tank through a penetration part formed in the lower part of the barrier wall. A settling tank pump to discharge internal sludge and wastewater of the settling tank is installed in the settling tank. The filtering tank comprises: a partition wall formed in one side to set a limit to a storage space; a filter support plate installed between the partition wall and the barrier wall to have a distribution space positioned in the lower part to be communicated with the penetration part and a filter space positioned in the upper part to arrange a filter part; a treated water outflow pipe arranged in the upper part of the storage space; a treated water pump installed in the storage space to supply treated water; a backwash water supply pipe connected to the treated water pump to wash the filter part in the upper part; and a washing water supply unit to supply the treated water in the storage space to the distribution space.