FIRST FLUSH STORMWATER TREATMENT APPARATUS INCLUDING CARTRIDGE SCREW TYPE SCREEN

摘要

A first flush treatment equipment including a cartridge screw type screen is provided to enable nonpoint source pollutants contained in first flush to be removed according to properties of the nonpoint source pollutants and easily maintain and manage the cartridge screw type screen by packing a packing material between inner and outer surfaces of the cartridge screw type screen, and expand the surface area of the inner surface and enable rainwater to flow smoothly by spirally forming the inner surface of the cartridge screw type screen. A first flush treatment equipment including a cartridge screw type screen comprises a first flush treatment tank(110) which guides first flush through a rainwater guiding path(111) communicating with a water channel. In the first flush treatment tank, a cartridge screw type screen(112) is installed to remove nonpoint source pollutants contained in first flush according to properties of the nonpoint source pollutants. The cartridge screw type screen consists of an inner surface and an outer surface in which through holes(a,b) are formed respectively. A packing material(c) is packed between the inner and outer surfaces, and the inner surface is spirally formed to guide a flow of first flush. The first flush treatment tank includes a sediment piling part(113) which is formed in a lower part of the cartridge screw type screen.