Using Ozone instead of Chlorine for Drinking Water Treatment under Egyptian Conditions

Abstract

The aim of this study was to improve disinfection techniques by using ozone in water treatment instead of chlorine. Current study for Nile water treatment revealed that the optimum dose was 10 mg/L and 4.6 mg/L for ozone and chlorine, respectively. The concentration of ozone and chlorine were under permissible limits according to the Egyptian standards for drinking water. The current work was shown to monitor TBC, TCs, FCs, and non-FCs by removal percentage reaching to 99.87, 99.97, 99.96, and 99.02% for each, respectively, for chlorine. While with ozone the removal percentage reaching to 99.9, 99.95, 99.93, and 98.92%, respectively. Microbiological examinations include: Total plate count, total coliform, total algal count, and microscopic examination. The ozone Algal counting analysis revealed that, total algae, green algae, blue- green algae, and diatoms with removal efficiencies of 91.07, 90.24, 100, and 88.24%, respectively, chlorine counting analysis show removal efficiencies of 94.42, 95.08, 100, and 91.62%, respectively. It’s concluded that using ozone is one of the future ways to meet the environmental water standards and supply the water requirements of the growing population.