![Sample our Earth Sciences journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5930/TOC-Subject-Sample-2021-Earth-Sciences.jpg"})
Abstract
The limitation of ozonation and the applicability of ozone/hydrogen peroxide process with a source water for a water supply using a flow-through type contactor were discussed. The water sample was pre-treated in a lab and spiked with bromide ion in the concentration range from 39 to 515 μg/L, and both 2-MIB and geosmin, odorous algal-derived compounds, from 58 to 609 ng/L under the hydrogen peroxide dose of 0 to 3.7 mg/L. When the initial concentration of Br− was around 50 μg/L, the formation of BrO3 − was controlled at less than 10 μg/L at the ozone dose of 2 mg/L, however the concentration of 2-MIB was over 10 ng/L in some cases with its initial concentration of around 100 ng/L during ozonation. When the initial concentration of Br− exceeds 100 μg/L, it seems very difficult to meet the standard for drinking water quality even with the initial 2-MIB concentration of 100 ng/L. The dose of H2O2 from 0.5 to 2.3 mg/L attained the standard for drinking water quality with the initial concentrations of Br− of approximately 50 μg/L and of 2-MIB of up to 500 ng/L at the ozone dose of 2 mg/L. When the initial concentration of 2-MIB was around 100 ng/L with the initial Br− concentration of up to 200 μg/L, the H2O2 dose of 1.7 mg/L also attained the standard for drinking water quality. When the initial concentration of Br− was around 500 μg/L, although the higher dose of H2O2 was required for the control of BrO3 − formation and the increase of the initial concentration of 2-MIB requires more H2O2 dose, the higher dose of H2O2 could attain the standard for drinking water quality of BrO3 − and 2-MIB (geosmin) simultaneously.