Comparison between Solar Radiation and Mother Chlorine for Water Disinfection and E. Coli

The aim of water disinfection is to destroy microorganisms that case water born-diseases. The purpose of this study was to investigate the efficacy of solar disinfection method as an appropriate policy and economically feasible in comparison with mother chlorine method for water supply in small communities, emergency situations and in deprived areas. Subjects and This laboratory scale experimental study was conducted in the summer of 2013 in the city of Khorramabad on synthetic solutions. The testes were carried out on perfectly sunny days on different degrees of turbidity, organic matter and State the different bacterial counts used. In order to determine the reduction in bacterial count in both the solar disinfection and mother chlorine were sampled and tested in multiple tube fermentation State the time intervals. Linear model analysis of variance with repeated measure analysis was performed. Both disinfection methods decreases bacterial average counts in the test periods. The bacteria removal efficiency was reduced with the increased initial bacteria count, turbidity and presence of organic matter. After the 60 min of start of treatment, the method solar radiation method, the mean number of bacteria remaining was 0.35±0.28 MPN/100 ml while with mother chlorine the mean number of bacteria remained was 32.59± 3.55 MPN/100 ml, which was 100 fold higher than solar radiation method. Solar radiation method is a very suitable, cheap and reliable method for water disinfections and can be employed under climatic conditions similar to Khorramabad. This method can be applied under critical condition and in small communities.