Characteristic study of Assimilable organic carbon (AOC) formation potential in drinking water

Characteristic study of assimilable organic carbon formation potential (AOCFP) at different reaction conditions of ozonation using model raw water containing humic substances and natural source drinking water was conducted. At low ozone dosage, assimilable organic carbon (AOC) concentration tended to increase. Maximum AOC concentration was determined when the residual ozone started to be measured. Therefore, ozone dosage required at maximum AOC concentration was found suitable to measure AOCFP in sample water. No significant relationship between dissolved organic carbon and respective ozone dosages was established. Variations in pH conditions found to have great influence on the development of AOC in sample water. Highest AOC concentration was estimated at pH 8 and a significant reduction in AOC concentration was observed as the system moved towards higher basic conditions, i.e. from pH 8 to pH 9. (author)