Abstract
Recently, ultraviolet (UV) radiation has been applied as a disinfection method for wastewater treatment plants. A high-intensity and high-power UV light source is required in the field of bacilli sterilization.
The electrodeless UV lamp turns on by delivering RF-frequency power from the power supply through the matching circuit into the induction coil around the lamp. The electric current passing through the induction coil generates a magnetic field. The gas sealed inside the lamp is excited and ionized by the magnetic field, and so discharge of the gas occurs and light is emitted. Thus the discharge produces UV emission.
Using RF frequency power circuit technology and optimizing UV lamp shape, we have made it possible to input power of 500W to a 500mm-length luminescent lamp. Moreover, an over 30% rate of UV radiating efficiency has been obtained. It realizes a high-intensity and high-power ultraviolet light source. Optimization of water current path in the sewage effluent disinfection has realized a colon bacillus removal ratio of 99.9%.
