Carrier filter and its application in sewage treatment

The invention discloses a carrier filter, which comprises a shell, a suspended carrier bed, a sludge buffer zone and a sludge layer; a water distribution system is arranged inside the sludge layer, the water distribution system is connected with one end of the water inlet pipe, and the other end of the water inlet pipe extends out of the shell; the sludge buffer zone is between the sludge layer and the suspended carrier bed, the suspended carrier bed and the sludge buffer zone are separated by a supporting screen, an effluent interception screen is also arranged above the suspended carrier bed, and the effluent interception screen is also communicated with a water collecting tank; the water collecting tank is located above the suspended carrier bed and is communicated with the shell. The invention also discloses an application of the carrier filter in sewage treatment. The invention has the beneficial effects that it has high-efficiency integrated precipitation and filtration functions, has the advantages of