Energy efficient water disinfection technology in city water supply system

The article describes a method of drinking water disinfection, based on the use of LED light sources for generating ultraviolet radiation, the radiation having a bactericidal effect on microorganisms and minimizing the energy expenditure. It eliminates the spread of pathogens in the water decreasing the amount of reagents, thereby eliminating secondary microbiological contamination in urban water supply. Studies have confirmed that the secondary contamination greatly influences the quality of drinking water. The causes for secondarycontamination initiation and development have been studied, methods and means to reduce their negative influence have been proposed. A multi-step system of water disinfection with ultraviolet LED light sources, based on the calculation of the entire area of their location and interaction of these elements in the creation of total light distribution and their interaction with the environment has been proposed. A method of lighting devices synthesis based on the known curve of luminous intensity of a single LED light source was developed as well as Light Power software ensuring luminous intensity of LED devices curve calculation with their arbitrary location and orientation relative to the center of the LED and for a certain state of the transmis-sion medium