The Effects of Ozonation, Biological Filtration and Distribution on the Concentration of Easily Assimilable Organic Carbon (AOC) in Drinkign Water

摘要

The concentration of easily assimilable organic carbon (AOC) as determiend with growth measurements using two bacterial cultures, increased linearly with ozone dosage at values below 1 mg O_3/mg C. Moreover, a linear relationship was found between AOC increase and the decrease of UV absorbance of water after oxonation with various dosages. Biological filtration in water treatment reduced AOC concentrations but hte remaining values were above the AOC concentration before ozonation. This AOC removal was attended with an increased coloy count in the filtrate. The AOC concentration of drinking water produced by the application of ozone in water treatment decreased during distribution. teh greatest decrease was observed with the highest AOC concentration. In this situation also the highest colony counts were found.