Electrochemical nitrogen and phosphorus removal device and method

An electrochemical nitrogen and phosphorus removal device, wherein the device comprises a three-dimensional electro-catalytic oxidation unit reactor, a three-dimensional electro-biological coupling unit reactor, a light filter material filter unit reactor and a three-dimensional electro-flocculation phosphorus removal unit reactor;

• a main water inlet pipe, the three-dimensional electro-catalytic oxidation unit reactor, the three-dimensional electro-biological coupling unit reactor and the light filter material filter unit reactor are connected in series such that sewage flows sequentially from the main water inlet pipe into the three-dimensional electro-catalytic oxidation unit reactor, then into the three-dimensional electro-biological coupling unit reactor, and finally into the light filter material filter unit reactor;
• a water outlet pipe of the light filter material filter unit reactor is connected respectively to a main water outlet pipe and a water inlet pipe of the three-dimensional electro-flocculation phosphorus removal unit reactor;
• a water outlet pipe of the three-dimensional electro-flocculation phosphorus removal unit reactor is connected to a water inlet pipe of the light filter material filter unit reactor through a reflux pump and a check valve, wherein the check valve is arranged downstream of the reflux pump;
• an aeration pipe and a blow-down pipe are provided at bottoms of tanks of the three-dimensional electro-catalytic oxidation unit reactor, the three-dimensional electro-biological coupling unit reactor, the light filter material filter unit reactor and the three-dimensional electro-flocculation phosphorus removal unit reactor, respectively.