Abstract:

To explore a new alternative technology to ozone sterilization for reducing the bromate content in drinking water, pulsed electric field (PEF) was used for the sterilization of drinking water in this study. Indigo carmine spectrophotometry and ion chromatography were used to determine the contents of ozone and bromate, respectively. PEF had strong sterilization effect on common microorganisms in water, resulting in a decrease by more than 5.5 logarithmic orders. The bromate contents in the water samples treated with 1.769 mg/L and 4.728 mg/L ozone were 0.039 mg/L and 0.045 mg/L, respectively. However, no bromate was detected in the water treated by PEF at 30 kV/cm.

Key words: PEF, water, ozone, bromate