Solar detoxification of wastewater: Bactericidal and photocatalytic activities of titania-based compounds in an externally-irradiated bubble column immobilized reactor

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Light-assisted treatment is one of the most attractive methods for wastewater reclamation - a major issue for Australia with limited fresh water resources. However, commercial exploitation is hindered by inability to harness sunlight and poor photoreactor design. This proposal deals with the development of Co-titania photocatalyst activatable by visible light to effect organic degradation and bacterial sterilization simultaneously at room temperature. The new reactor permits in-situ separation of the solid catalyst from treated liquid thus ensuring continuous production of recyclable water. The huge economic returns of solar-operated mobile or stationary wastewater unit from local and international markets are obvious.