Device for treating dye wastewater by dielectric barrier discharge technology and method thereof

Abstract

The invention relates to a device for treating dye wastewater by a dielectric barrier discharge technology and a method thereof. Uniform grooves are processed on a surface of a metal negative plate to make dye wastewater formed into a uniform liquid film on the surface of the negative plate; a metal column closely clings to a dielectric barrier inner wall to form a sleeve structure, the distance between the sleeve and the negative plate is adjusted to form dielectric barrier discharge between the negative plate and a high-voltage electrode, and pollutants are degraded by O3, .OH, H2O2, high-energy electrons, ultraviolet light and the like generated in the discharge process; unused ozone and other active substances generated in reaction are injected into a container through a micropore aeration device so as to further degrade organic matter in the dye wastewater; and in addition, Mn2+, Cu2+, Zn2+, Co2+ and other metal ions or MnO2, FeOOH, TiO2, active carbon and other heterogeneous catalysts are added into the reaction container to strengthen a treatment effect.

Description

technical field [0001] The invention relates to water treatment technology in the field of isothermal plasma engineering and environmental engineering, in particular to a device and method for treating dye wastewater by dielectric barrier discharge technology. Background technique [0002] Dye wastewater has the characteristics of complex composition, high concentration, deep color, high salt content, poor biodegradability, and large pH changes. It has always been the focus and difficulty of industrial wastewater treatment. At present, dyes are developing toward anti-photolysis, anti-oxidation, and anti-biodegradation, which makes it difficult for traditional dye wastewater treatment technologies to achieve standard discharge treatment. In recent years, sewage discharge standards have become increasingly strict, and the treatment of dye wastewater has become one of the environmental problems that need to be solved urgently. [0003] In recent years, advanced oxidation proce...

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Problems solved by technology

[0006] However, there are still some problems in the actual application of the dielectric barrier discharge technology to treat dye wastewater: ① The dye wastewater to be treated cannot form a relatively uniform liquid film on the surface of the medium, which is easy to cause partial discharge, and has a higher trigger discharge voltage. requirements; ② Some chemical substances (such as H 2 o 2 and O 3 etc.), due to the short contact time with dye wastewater, it has not been fully utilized

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