Гігієнічна оцінка ефективності сонячної дезінфекції питної води

Abstract

Solar disinfection (SODIS) is a simple and affordable way to disinfect drinking water. WHO has recommended SODIS as a domestic water treatment (HWT) technology. Theoretical and methodical foundations of solar disinfection of drinking water are presented in previous domestic publications. Approbation and hygienic evaluation of this method has not been carried out in Ukraine so far. Goal. Hygienic evaluation of the effectiveness of solar disinfection of drinking water. Research methods. Sanitary and hygienic, sanitary and microbiological, statistical. Research results. The total duration of experiments in all cases was the same - 6 hours. The air temperature was 35-38 °C, bottled water 38-41 °C, the maximum dose of solar radiation (mVt/cm2) 76-82, the first inoculation of coliforms (CFU/100ml) 105. It was established that in all 4 experiments during July 2024, solar disinfection of drinking water provided 5 log10 inactivation of total coliforms. The results correspond to the literature data on the high efficiency of solar disinfection of drinking water. The need for careful adherence to certain established methodical procedures is emphasized, which will create conditions for effective inactivation of microorganisms and epidemic safety of drinking water, as well as development and research of alternative materials or modification of existing ones to increase their availability. Conclusion. The obtained results are preliminary, but they should be considered as the first step in research on the optimization and expansion of the spectrum of application of solar disinfection of drinking water.