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The Removal of Natural Organic Matter and Disinfection By-Product Precursor by Ozone  

Son, Hee-Jong (Water Quality Research Institute, Waterworks Headquarter, Busan)
Roh, Jae-Soon (Water Quality Research Institute, Waterworks Headquarter, Busan)
Kim, Sang-Goo (Water Quality Research Institute, Waterworks Headquarter, Busan)
Kang, Lim-Seok (Dept. of Environmental Engineering, Pukyong National University)
Lee, Yong-Doo (Dept. of Environmental Engineering, College of Ocean Sciences, Cheju National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.27, no.10, 2005 , pp. 1099-1107 More about this Journal
Abstract
The purpose of this study was to find the transformation of organic matter as well as chlorine by product formation potential with ozone dosage. The removal percents of $UV_{254}$ and DOC were $23%{\sim}65%$ and $2%{\sim}15%$ and THMFP and HAAFP were $17%{\sim}52%$ and $9%{\sim}29%$ respectively at $0.5{\sim}3\;mgO_3/mgDOC$ ozone dosage. The hydrophobic and transphobic organic matter were reduced to $37%{\sim}68%$ and $35%{\sim}64%$, on the other hand the hydrophilir organic matter was increased to $40%{\sim}49%$ at $0.5{\sim}3\;mgO_3/mgDOC$ ozone dosage. The produced THMFP and HAAFP from the hydrophobic and transphilic organic matter were decreased greatly with increasing ozone dosage but these by products were increased in the hydrophilic matter. The produced THMFP and HAAFP per unit DOC were decreased and reactivity was reduced greatly with increasing crone dosage. The removal rate of THMFP per unit DOC was much higher than HAAFP by ozone treatment. The Br-THMFP per unit DOC was much more removed than chloroformFP per unit DOC with increasing ozone dosage. and The removal rate of TCAAFP per unit DOC was increased with increasing ozone dosage but TCAAFP was not affected by ozone treatment. Br-HAAFP was decreased at $1\;mgO_3/mgDOC$ ozone dosage but was not more removed above $1\;mgO_3/mgDOC$ ozone dosage. Br-HAAFP had lower removal effect than Br-THMFP by ozone treatment. The optimal ozone dosage can be determined about $1\;mgO_3/mgDOC$ by considering both disinfection by product formation and economical efficiency.
Keywords
NOM; Ozonation; DBPs Formation Potential; Optimal Ozone Dosage;
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