Sewage treatment system based on organic-matter photocatalytic oxidative decomposition

Abstract

The invention discloses a sewage treatment system based on organic-matter photocatalytic oxidative decomposition, which comprises a water inlet, a water outlet, a reactor, photocatalytic light sources, catalyst granule interlayers, a partition, a precipitation tank, stirring shafts and stirring paddles, wherein the plurality of catalyst granule interlayers are arranged at intervals below the top of the reactor, so that the inside cavity of the reactor is divided into a plurality of reaction chambers, thereby implementing a downward multiple-stage treatment structure; and the inside of each reaction chamber is provided with one photocatalytic light source and one stirring paddle, and each stirring paddle is connected with a servomotor through the stirring shaft. The system can perform multiple-stage treatment on the sewage; in the treatment process, the organic matters can be sufficiently irradiated and catalyzed through stirring, thereby keeping the reaction efficiency stable, preventing the catalytic material and light source surface from being attached by the substances, and further prolonging the service life of equipment.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to a sewage treatment system based on photocatalytic oxidation and decomposition of organic matter. Background technique [0002] Photocatalytic oxidation (Photocatalytic Oxidation, PCO) treatment of sewage is a new technology that has emerged in the past ten years, and the research in the field of pollution control is currently very active. The basic principle is: semiconductor photocatalysts, such as TiO2, SnO2, ZnO2Ag3PO4BiOClBi4Ti3O12BiWO3, etc. are illuminated to form electron-hole pairs, which can generate OH free radicals with strong oxidizing ability in water, thereby oxidizing and degrading pollutants; among them, It mainly uses ultraviolet (Ultraviolet, UV) radiation to enhance the oxidation treatment effect, accelerate the oxidation degradation of pollutants, and make some difficult reactions go smoothly, so as to greatly increase the oxidation degradation rate. [0003] At p...

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Problems solved by technology

[0003] At present, when using photocatalytic oxidation technology to treat sewage, the existing treatment system can only be applied to nano-powder catalysts, but nano-powder catalysts are not conducive to recycling and are likely to cause secondary pollution. Therefore, the current scientific research work has focused on Concentrate on the development of nano-membrane materials, but there are very few sewage treatment systems suitable for using nano-membrane materials for catalysis, and most of them cannot realize real-time monitoring of the concentration of sewage pollutants before, during and after treatment, and all of them need to use The sampling measurement in the traditional method greatly increases the manual workload of the experimenter, wastes labor, and the detection efficiency is not high

And in the process of use, after the catalytic material is used for a long time, the surface is adhered by substances, resulting in a decrease in reaction efficiency and scrapping of the material

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