An embodiment of the invention provides a device and a method for treating
refractory wastewater by
coupling an electrocatalytic membrane with a three-dimensional
electrode. The device mainly comprises a Ti4O7 / Ti
filter element anode, a water-permeable separation mesh, a
graphite felt
cathode, C@Fe3O4 particles, an
aeration pipe and a current-stabilized and
voltage-stabilized power supply; and the device is in the shape of a cylinder on the whole, the Ti4O7 / Ti
filter element anode is fixed at the center of the bottom of the device and a layer of water-permeable separation mesh wraps the surface of the
anode, the
graphite felt
cathode clings to the inner wall of the cylinder, the
aeration pipe is placed at the bottom of the device and beside the
graphite felt
cathode, the C@Fe3O4 particles fill the space between the water-permeable separation mesh and the graphite felt cathode to form the three-dimensional
electrode, the graphite felt cathode and the Ti4O7 / Ti
filter element anode are connected with a negative
electrode and a positive electrode of the current-stabilized and
voltage-stabilized power supply, respectively, and
organic matter in the
wastewater is degraded by a constant-current
operation mode. In the device and the method provided by the invention, the Ti4O7 / Ti filter element anode is coupled with the C@Fe3O4 three-dimensional electrode
system to enhance the
treatment effect on
refractory pollutants, and through the synergistic effect of the cathode and the anode, the efficiency of the
system for oxidizing pollutants is improved, and the
energy consumption for
wastewater treatment is reduced.