Method for treating high-salt degradation-resistant wastewater by using closed bipolar electro-Fenton reactor

Abstract

The invention relates to an electro-Fenton reaction device and a wastewater treatment method. The reaction device comprises an anode tank, an adjusting tank and a cathode tank, electrodes in the anode tank and the cathode tank are used as driving electrodes, a conductive part is used as a common electrode to transmit electrons, and the anode tank and the cathode tank independently react. The wastewater treatment method comprises the following steps: adjusting the pH value of wastewater, adding a catalyst, and introducing the wastewater into the anode tank, the adjusting tank and the cathode tank; adding an oxidizing agent into the cathode tank, turning on a power supply and an ultraviolet lamp, and carrying out degradation reaction; and discharging the wastewater in the cathode tank, injecting the wastewater in the adjusting tank into the cathode tank, injecting the wastewater in the anode tank into the adjusting tank, injecting the untreated wastewater into the anode tank, and continuously carrying out degradation reaction. The problem that in the process of treating the high-salinity wastewater through an existing electro-Fenton system, chloride ions rapidly consume an oxidizing agent, and consequently the treatment effect of the high-salinity wastewater is poor is solved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an electro-Fenton reaction device and a wastewater treatment method. Background technique [0002] With the substantial increase in the amount of high-salt wastewater in printing and dyeing, papermaking, chemical and pesticide industries, the huge harm and irreparable characteristics it brings to the regional environment make the treatment of this type of wastewater increasingly become a hot issue in the field of water pollution and environmental governance. In particular, industrial saline wastewater, including chloride salts, sulfates and nitrates, contains a large amount of toxic and refractory organic pollutants in addition to high concentrations of salt itself. [0003] In the prior art, commonly used wastewater treatment technologies include membrane separation method, advanced oxidation method, biological treatment method, etc., but these methods are difficult...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of electric Fenton reaction device and the method for wastewater treatment, to solve the existing electric Fenton system processing high salt wastewater process, due to There is a large amount of chlorine ions, so that the chlorine ions will form a large amount of active chlorine with the oxidant (hydrogen peroxide) on the surface of the anode, thereby rapidly consuming the input oxidant-hydrogen peroxide (HClO+H2O2 sub>→H++Cl-+H2O+O2), and quench Hydroxyl radicals (·OH+Cl-→·HOCl-;·HOCl-+H+→Cl ·+H2O;

[0006]), resulting in poor treatment effect of high-salt wastewater

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