SODIS potential: A novel parameter to assess the suitability of solar water disinfection worldwide

This paper studies the worldwide applicability of solar water disinfection (SODIS) technology through a novel parameter: SODIS potential. parameter is defined as inverse ratio between required exposure time to achieve four log E. coli and six hours recommended by standard protocol. The inactivation kinetics was predicted fitting results under different temperature incident radiation semi-empirical model, including synergy term bacterial stress sources (light/heat). To estimate potential, calculator developed based on Sun's position, atmospheric extinction, cloud-cover, elevation. time-varying total available at any location estimated for each day along year during sunlight hours. also from minimum maximum values, introducing its dynamic variation with water. Both values are input into kinetic model rate. Based these number batch disinfections that can reach goal 99.99% elimination in 1 daily this computed; latter finally transformed study, illustrated contours indicating potential other relevant indicators overlayed world map, confirm latitude has significant contribution highest close equator. However, highlight importance critical differences equal regions.