Ultraviolet Disinfection of Municipal Wastewater Effluents

摘要

During this project two different UV exposure and irradiation systems were studied. The first system investigated was the Kelly-Purdy Unit, which consisted of a shallow-tray exposure chamber with 13 UV lamps mounted horizontally 10 cm above the bottom of the chamber. This unit was operated under varying conditions of both flow and depth and generally provided inadequate disinfection, although fecal coliform densities were usually reduced by approximately three logs. The second UV system used during the project was the Model EP-50 manufactured by Ultraviolet Purification Systems, Inc. This exposure chamber consisted of a stainless steel pressure vessel with nine UV lamps running longitudinally through the chamber.