The effectiveness of novel chlorine dioxide in drinking water disinfection

The presence of E. coli in drinking water is not very common, however drinking water polluted with E. coli can lead to infection and could cause serious illness. Water contamination can lead to adverse health effects, including gastrointestinal illness, reproductive problems, and neurological disorders. More than 200 diseases are derived from polluted water. The main objective of present research was to evaluate the effectiveness of novel chlorine dioxide for the inactivation of E. coli in drinking water. Chlorine dioxide is made of two compounds: liquid sodium chlorite and solid sodium-peroxodisulphate »in situ«. Chlorine dioxide composition is in accordance with water treatment regulation [1]. In this experiment, different concentrations of chlorine dioxide were added at different temperatures in order to determine the optimal conditions for E. coli removal from drinking water. Results showed that optimal dose is 0.2 mg/L of chlorine dioxide at room temperature, while the same dose was effective at increased temperatures at 30 °C and 40 °C. The contact time was less than 1 min