Optimization of Photo-electrochemical Hybrid Process with Polyurethane/Titanium Dioxide-Graphene Electrodes in the Presence of Ozone gas in Landfill treatment

Authors

1 Islamic Azad University, West Tehran Branch

2 Associate professor, Islamic Azad University, West Tehran Branch

Abstract

In this study, a photoelectrochemical hybrid process in the presence of ozone gas was used to reduce COD of the Karaj Halghedare landfill leachate and the effect of initial pH, reaction time, electric current, distance between electrodes and ozone concentration in the presence of Ultraviolet radiation was evaluated using RSM. Based on the obtained results, the best conditions of the hybrid process include pH equal to 5.9, reaction time equal to 100 minutes, electric current applied on the surface of the electrodes equal to 0.23 amps, distance between the electrodes equal to 0.5 cm and ozone gas concentration equal to 5 mg / l. min, in which case the efficiency of 93.24% of COD reduction in leachate was obtained and the amount of COD was reduced from 13,260 mg / l to 1396 mg / l. Based on these results, the effluent cannot be discharged directly into the environment and other processes for further treatment should be used, especially biological processes.

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Journal of Civil and Environmental Engineering

Articles in Press, Accepted Manuscript
Available Online from 05 February 2022

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