Title :
Decomposition of organic substances in water by combined O3 /TiO2/UV process for the reuse of wastewater
Author :
NoguchI, Hiroshi ; SATO, Shigeo ; Isogai, Takashi
Author_Institution :
Inst. of Lab., Meidensha Corp., Tokyo, Japan
Abstract :
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
Keywords :
decomposition; lighting; ozone; titanium compounds; water treatment; O3; TiO2; UV light illumination; black-light lamp; organic substances decomposition; quantum yield; total organic carbon; wastewater reuse process; Costs; Laboratories; Lamps; Light sources; Oxidation; Production; Purification; Testing; Titanium; Wastewater;
Conference_Titel :
Environmentally Conscious Design and Inverse Manufacturing, 1999. Proceedings. EcoDesign '99: First International Symposium On
Conference_Location :
Tokyo
Print_ISBN :
0-7695-0007-2
DOI :
10.1109/ECODIM.1999.747747
