Reactor and method for treating landfill leachate by combining electro-Fenton with denitrification biological filter

The invention discloses a reactor for treating landfill leachate by combining electro-Fenton with a denitrification biological filter. The reactor comprises an inner cylinder body, a middle cylinder body, an outer cylinder body, a cylindrical anode plate, a cylindrical cathode plate, a particle electrode, denitrification biological filter filler, an aeration device, an air compressor, a middle perforated partition plate, a bottom perforated partition plate, a settling hopper, a water quality adjusting area, a water distributor, a dosing pump, a backwashing water inlet pump, a backwashing waterinlet, a backwashing air inlet, a denitrification biological filter supporting layer, a backwashing water outlet and a voltage-stabilizing direct-current power supply; the invention also discloses amethod for treating landfill leachate by combining electro-Fenton with the denitrification biological filter. H2O2 does not need to be additionally added, the cylindrical baffling structure increasesthe effective contact area