Device and method for treating organic wastewater with TiO2 photocatalysis rotary disc fuel cell

Abstract

The invention provides a device and a method for treating organic wastewater with a TiO2 photocatalysis rotary disc fuel cell. TiO2 photocatalyst is loaded on a photo-anode rotary disc substrate to serve as a photoanode rotary disc, and a photocathode rotary disc and the photoanode rotary disc are respectively placed in a photocathode reaction tank and a photoanode reaction tank, which are partitioned from each other by an ion exchange membrane in between. A motor is started, a speed controller is utilized to control the rotation speed of the rotary discs, and thereby a layer of liquid film is formed on the surface of each rotary disc. An excitation light source is used for irradiating the photoanode rotary disc, and while the light absorbed by the organic wastewater is greatly reduced, the utilization rate of the excitation light and the efficiency of photocatalytic degradation are increased as well. The double reaction tanks can effectively prevent the ineffective compounding of oxidation product and reduction product in solution, moreover, different types of organic wastewaters with different concentrations can be degraded in the two reaction tanks, meanwhile, the combination loss of photoinduced electrons and holes on the TiO2 surface can be reduced, consequently, the utilization rate of the excitation light and the efficiency of pollutant degradation are increased, and high efficiency and low consumption are achieved.

Description

technical field [0001] The invention relates to a system for treating organic wastewater in the fields of energy, chemical industry and environment, specifically a TiO 2 A photocatalytic turntable fuel cell device and method for treating organic wastewater. Background technique [0002] In recent years, TiO 2 It has been proven to be a highly efficient, stable, non-selective and readily available semiconductor photocatalyst. TiO 2 As an advanced oxidation technology, photocatalysis can almost completely mineralize pollutants in air and water. Since Fujishima discovered TiO in 1972 2 Since the photocatalytic splitting of water, TiO 2 Semiconductor photocatalysis technology has gradually been extensively studied in the treatment of organic matter. To solve TiO 2 Difficult to separate from wastewater, TiO 2 are immobilized on various supports, due to TiO 2 Immobilization will cause its surface area to decrease and thus its photocatalytic activity to decrease. The resea...

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Problems solved by technology

However, the anode and the cathode are in the same reaction cell, and the solutions in the anode area and the cathode area are rapidly mixed due to the rotation of the turntable, resulting in ineffective recombination of the oxidation product produced in the anode area and the reduction product produced in the cathode area due to stirring and mixing, which reduces the Degradation efficiency of target pollutants

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