Enterococcussp. Inactivation by Ozonation in Natural Water: Influence of H₂O₂and TiO₂and Inactivation Kinetics Modeling

This article presents the results about the disinfectant power of treatments based on the application of ozone (578 mg O3 h−1) and ozone combined with TiO2 (1 g L−1) and H2O2 (0.04 mM) on Enterococcus sp., a bacteria indicator used in the control of water quality. The results show that all the ozone-based treatments under study achieve the inactivation of Enterococcus sp. solution in natural water. Moreover, the combination of ozone with H2O2 or TiO2 lightly improves the inactivation of Enterococcus sp. compared to the ozonation. However, the treatment with O3, H2O2 and TiO2 is less effective than the use of O3, O3/H2O2 or O3/TiO2. Finally, the primary mathematical models are applied (Hom, biphasic and Mafart) and they adequately describe the disinfection kinetics of the ozonation treatments studied for Enterococcus sp.