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Decomposition of organic substances in water by combined O3 /TiO2/UV process for the reuse of wastewater

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3 Author(s)
H. Noguchi ; Inst. of Lab., Meidensha Corp., Tokyo, Japan ; S. Sato ; T. Isogai

A combined process using ozone and titanium dioxide under the illumination of UV light (O3TiO2/UV) was tested to decompose refractory organic substances in wastewater. A synergistic effect was observed between ozone and illuminated TiO3, and more than 60 percent of total organic carbon (TOC) in wastewater was removed by the O3/TiO2/UV process. The quantum yield for the reaction in the O3/TiO2/UV process was obtained, and trial calculations were made of the energy and cost required for the decomposition of organic substances. If a black-light lamp is used as the light source, trial calculations based on the results show that TOC can be removed at the rate of 1 mg/L at an electric energy of 0.59 kW·hr/m3, which indicates that a low-cost circulation system can be created with the use of the O3 /TiO2/UV process

Published in:

Environmentally Conscious Design and Inverse Manufacturing, 1999. Proceedings. EcoDesign '99: First International Symposium On

Date of Conference:

1-3 Feb 1999