Abstract
In this study water disinfection capability of three household ultraviolet water purifiers was studied. The first two purifiers were composed of three housings, namely, for polypropylene yarn cartridge, for granular activated carbon cartridge and for 4-pin ultraviolet lamp. The third purifier was a horizontal water flow system containing a bi-pin ultraviolet lamp labeled as UV water Sterilizer. This study focused on the performance of the cylindrical UV disinfection reactor. Eleven ultraviolet lamps were labeled and placed in the UV sets turn wise. 100 ml of water samples collected from various sites were studied for coliform colonies growth before UV irradiation and after the process. To study the affect of the biodose on the efficiency of UV lamps, one/two ml of sewage was injected in 25 liters of tube well water. The performance of various lamps was studied after 24 hours incubation. The lamps were efficient for low bio-dose but none of the lamps was found efficient against high-bio-dose. The public he...
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