Waste water treatment device using electro-Fenton reaction

A waste water treatment device using an electro-Fenton reaction comprises an electro-Fenton main device and a depth reactor. The main device is provided with a first anode plate, a cathode plate and a second anode plate which are horizontally parallel to and faced with each other, extending cathodes are arranged on two sides of the cathode plate, and a water outlet pipe connected with the depth reactor is arranged on the upper portion of the main device. Packing materials, an over-flow pipe and a refluxing pipe are arranged in the depth reactor. The cathodes of two groups of electrical current electrical sources are connected with the cathode plates, the anodes of the two groups of electrical current electrical sources are connected respectively with the first anode plate and the second anode plate, and an ampere meter supervises the working current of the two groups of the electrical current electrical sources respectively. A water inlet pump, a refluxing pump and an air blower provide water and air from the bottom of the device. The first anode is a dimensionally stable anode with a stannum, antimony, iridium and tantalum composite oxide catalyst plated on a titanium surface, and the second anode plate is a steel plate. When the device is in operation, aerated air generates H2O2 in a cathode area and Fe2+ in a second anode area, H2O2,Fe2+ and water are subjected to an electro-Fenton reaction, and organic pollutants contained in the waste water are degraded by a hydroxyl radical generated by the reaction. The electro-Fenton reaction continues when the waste water enters the depth reactor, thereby guaranteeing reaction residence time and realizing large reflux quantity.