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As a new wastewater treatment technology, a lot of work has been done relating to enlarge TiO2 thin film electrode areas, Contrast to traditional water treatments like aerobic, anaerobic and biological treatment, the photoelectrocatalytic treatment has lower costs, shorter processing cycle, complete degradation and many other advantages.Photoelectrocatalysis has only been studied in laboratory at present. first, irradiation light utilization efficiency is low; second, transfer speed is low; third, reactor setup is high energy-consuming and complex.For the above, our lab proposed the TiO2 rotating disk photoelectrocatalytic reactor (RPEC). By loading the catalyst on the rotating disks, we can enhance the transfer of the wastewater and form about tens of microns liquid film on the surface of the disks through which the catalyst can be irradiated by the excitation light. This helps to solve the problem of utilization of light and reduce the simple compound of electrons and holes by adding bias voltage, and improve the efficiency eventually.It is prove that degrading the dye wastewater by the RPEC reactor has good efficence, but lacks the research for the reaction mechanism and the degrading process.In order to solve this problem, by establishing the mathematical model, the complex problem is transferred into the corresponding maths problem. And the obtained degradation model and egradation curve can help to better study the mechanism and process of the RPEC reactor. Based on the RPEC kinetic equation and considering the influence facts including light intensity, bias voltage, wheel speed, initial concentration, catalyst dosage and radius of the ractor, set up the degradation curve by using iterative calculation in MATLAB software to simulate the rotating process. The detailed work is described below:1. Considering the impact of bias voltage, wheel speed, initial concentration, and radius on the ractor, and establish the mathematical degradation model using the iteration method:2. Based on the mathematical degradation model for the RPEC reactor, further dicuss the impact of radius, reactor volume, turntable series on the model. All these including initial concentration, bias voltage, wheel speed, radius, reactor volume, turntable series help to build a more complex mathematical model for the RPEC reactor:3. Proposed a reactor cascade or parallel combinations so as to make a better solution for the degrading of the dye wastewater based on the concentration, flow rate and the area. Thus can reduce the area, reaction time and the energy consumption.
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