| Abstract [eng] |
Quality of water is very important for people health and well-being. The quality of recreational water, for example, in swimming pools, must be as good as drinking water. Water hazards in swimming pool can be chemical and microbiological and therefore require appropriate treatment to remove disease-causing agents. Advanced oxidation processes are an alternative to classical water treatment methods. This study demonstrates the reduction of bacteria from model swimming pool water when the water is treated with advanced oxidation processes, such as ozone (O3), ultraviolet light (UV) and photolytic ozonation. Efficiency of the bench-scale advanced oxidation reactor was tested in conditions for periodic and continuous operation. An artificial body fluid analogue with addition of bacteria was used to simulate bather load. The performance was estimated in terms of microbial inactivation. The results showed that bacteria inactivation efficiency of the combined O3/UV process was higher when oxidation methods are used combined, not separated. The higher ozone concentration results the higher water treatment efficiency. The concentration of body fluid analogue and microbiological contamination has a small effect on water treatment efficiency during the first minutes of the process. Using different combinations of methods, in all cases, the efficiency of model water purification reaches 99,9%, but the duration of disinfection varies. In periodic operation the model water is cleaned up to the required level within 3 – 4 minutes, in continuous operation – within 80 minutes. |
