L.-S. Wong, C. McCullagh, P.M. Pollard, S. Officer, and H.B. Mafe (UK)
Wastewater treatment, Photocatalysis, AdvancedOxidation Process, UV/TiO2
The effective treatment of contaminated water is vital to provide a sustainable means of water consumption and usage. In this study, an advanced oxidation process (AOP) was investigated as a potential wastewater treatment method. The efficiency of an industrial scale twin tank (Tank A and Tank B) photocatalytic reactor was investigated with methylene blue (MB), toluene and contaminated groundwater samples from ex-gas works. The reactor was designed to use in pellet form which is directly submerged in the effluent. Treatment of MB with Tank A of the photocatalytic reactor showed 97.89 % removal efficiency and total organic carbon (TOC) reduction of 84.40 % after 150 minutes. Further trials showed that the efficiency of Tank A was better than Tank B (removal efficiencies were 57.73 % and 42.42 % respectively). Treatment in continuous mode was more effective than single tank batch mode; approximately 95.88 % removal of MB was demonstrated in continuous mode. Tank A achieved 92.58 % and 92.64 % of toluene and TOC removal respectively. FT-IR analysis suggested that 91.41 % of total petroleum hydrocarbon (TPH) removal was achieved after the treatment of contaminated groundwater using the photocatalytic reactor. These promising results demonstrate a desirable prospect in environmental application.
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