Process for disinfecting sewage water by auricome-titanic oxide photocatalysis

Abstract

The invention discloses a method for sterilizing sewage by hydrogen peroxide-titanium dioxide photocatalysis and adopts the titanium dioxide photocatalysis and hydrogen peroxide to treat the sewage. The invention adds H2O2 to a TiO2UV system to form a H2O2-supported TiO2 photocatalysis system; the reaction of the hydrogen peroxide and the negatively charged electron consumes the electron in the reaction, thus reducing the chance of compound with cavities and remarkably improving the photocatalysis reaction efficiency. The proposal of the invention remarkably reduces the investment and operation cost of the ultra violet sterilization of the sewage, overcomes the defects of instability of UV sterilization technical effect and photoreactivation of microorganisms, develops the application of the UV sterilization technique in the sewage treatment and strengthens the decomposition of non-degradable organic pollutant, thus being a promising sewage treatment method.

Description

Technical field [0001] The invention relates to a method for disinfecting sewage, in particular to a method for disinfecting sewage with hydrogen peroxide-titanium dioxide photocatalysis. Background technique [0002] At present, sewage treatment has become a key issue of environmental protection. The technology of ultraviolet disinfection of sewage has the advantages of fast speed, small area, simple operation, easy operation and management, and automatic control. However, ultraviolet disinfection is easily affected by variable factors such as sewage turbidity and ultraviolet light transmittance, and does not have residual disinfection capabilities. , After disinfection, the effluent microbial photoresurrection phenomenon makes the UV disinfection effect unstable, which directly affects the application of UV disinfection technology in sewage disinfection. Immobilized titanium dioxide (TiO 2 ) Photocatalytic oxidation technology has the advantages of stable properties, mild condi...

AI Technical Summary

Problems solved by technology

The technology of ultraviolet disinfection of sewage has the advantages of fast speed, small footprint, simple operation, convenient operation and management, and automatic control. However, ultraviolet disinfection is easily affected by variable factors such as sewage turbidity and ultraviolet light transmittance, and has no residual disinfection ability. 1. Photoreactivation of microorganisms in the water after disinfection makes the ultraviolet disinfection effect unstable, which directly affects the application of ultraviolet disinfection technology in sewage disinfection

Solid-supported titanium dioxide (TiO 2 ) Photocatalytic oxidation technology has the advantages of stable properties, mild conditions, thorough reaction, low energy consumption, and low price. At the same time, it solves the problem that the catalyst in the presence of TiO2 in the powder suspension state is not easy to recycle, easy to poison, and difficult to make a high-efficiency photocatalytic reactor. It has been successfully applied to sewage treatment such as disinfection, organic matter decomposition, algae killing, etc., but the effect of photocatalytic reaction on high-concentration microorganisms is poor, and the recombination of electron-hole pairs in the reaction process will greatly reduce the photocatalytic reaction. efficiency

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