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http://dx.doi.org/10.5322/JESI.2014.23.9.1635

Evaluation of Biodegradation Characteristics of Haloacetic Acids by a Biofilm in a Drinking Water Distribution System  

Son, Hee-Jong (Water Quality Institute, Water authority)
Kim, Do-Hwan (Water Quality Institute, Water authority)
Han, Young-Rip (Department of Environmental Engineering, Dong-A University)
Choi, Young-Ik (Department of Environmental Engineering, Dong-A University)
Publication Information
Journal of Environmental Science International / v.23, no.9, 2014 , pp. 1635-1642 More about this Journal
Abstract
Haloacetic acids (HAAs) concentrations have been observed to decreased at drinking water distribution system extremities. This decrease is associated with microbiological degradation by pipe wall biofilm. The objective of this study was to evaluate HAAs degradation in a drinking water system in the presence of a biofilm and to identify the factors that influence this degradation. Degradation of monochloroacetic acid (MCAA), dichloroacetic acid (DCAA) and trichloroacetic acid (TCAA) was observed in a simulated distribution system. The results obtained showed that different parameters came into play simultaneously in the degradation of HAAs, including retention time, water temperature, biomass, and composition of organic matter. Seasonal variations had a major effect on HAAs degradation and biomass quantity (ATP concentration) was lower by 25% in the winter compared with the summer.
Keywords
Drinking Water Distribution System; Biofilm; Biomass; Haloacetic Acids; Biodegradation;
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