TAIL WATER DECENTRALIZED TREATMENT AND DRAINAGE SYSTEM OF SEWAGE TREATMENT PLANT

摘要

The present invention provides a tail water decentralized treatment and drainage system of sewage treatment plant, comprising a riparian vegetation buffer zone, a subsurface flow constructed wetland and a riverside protection pile, the riparian vegetation buffer zone comprises an excavation protection slope and an ecological bag paved on the excavation protection slope. The subsurface flow constructed wetland is disposed on the river protection slope along the river flow direction, the subsurface flow constructed wetland is provided with a treatment system, a water drainage system and a plurality of outlet pipes disposed along the river flow direction. The present invention is novel in idea and reasonable in design. By constructing a subsurface flow constructed wetland on the slope of the river bank after repositioning, the vegetation buffer zone and the subsurface flow constructed wetland are skillfully combined, and the tail water of sewage treatment plants is purified and treated through the subsurface flow constructed wetland. It is particularly suitable for changing the condition of single drainage outlet for the sewage treatment plant constructed near the river, with strong practicability.