DEVELOPMENT AND EVALUATION OF A RING-SHAPED WATER DISINFECTION SYSTEM USING UV LIGHT EMITTING DIODES

Abstract

 A UV light emitting diode (UV-LED) is an attractive UV light source that is free of mercury and lead, robust against shocks and small. In this study, we developed a ring-shaped UV-LED module to be attached to the outer wall of quartz cylinder. Inactivation efficiencies of Escherichia coli and coliphage Qβ were measured and the hydraulic condition inside the cylinder was simulated by a computational fluid dynamics (CFD) software. As a result, the inactivation efficiency of the module was significantly affected by the hydraulic condition. In addition, we examined the characteristics of the module by calculating the distribution of flow rate and dose rate inside the cylinder.