Study of Effective Factors on E.coli Removal from Water Using Solar Radiation Disinfection

The removal of microbial pollutants is important for access of water quality standard. Therefore, drinking water disinfection for pathogens removal or inactivation conducted in water treatment installations. Today, due to environmental friendly, solar radiation disinfection considered. Objective of this study was effect of certain environmental factors such as turbidity, organic matter, container kind, and initial bacteria concentrations on E. coli removal from water solution using solar radiation disinfection.
Material and In this study, the performance of E. coli removal were evaluated using different container (PET and Glass), turbidity (0, 10, 20 NTU), organic matter (0, 5, 10 mg/l), and initial E. coli concentrations (100, 200, 300 bacteria/ml) as experimental study. This study conducted at perfectly sunny days in July and August between 11 to 15 o’clock with maximum radiation intensity.
Results of this study show that both PET and Glass containers are capable to decrease of 300 E.coli per milliliter to zero at 60 min contact time. With increasing of organic matter, turbidity, and initial concentration of E. coli, bacterial removal rate from water solution decreased. Generally, solar radiation can be provide 100 % removal of E. coli in a water solution with 300 E. coli/l as initial concentration, 20 NTU of turbidity and 10 mg/l of organic matter with 60 min contact time.
The use of solar radiation technology is suitable for drinking water disinfection both at household level and at remote communities even for water with high turbidity and high organic matter concentrations.