Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Prediction of residual chlorine using two-component second-order decay model in water distribution network

이변량 감소모델을 적용한 배급수관망에서의 잔류염소농도 예측 및 이의 활용

  • Kim, Young Hyo (Department of Environmental Engineering, Konkuk University) ;
  • Kweon, Ji Hyang (Department of Environmental Engineering, Konkuk University) ;
  • Kim, Doo Il (Department of Civil and Environmental Engineering Dankook University)
  • Received : 2014.03.14
  • Accepted : 2014.05.30
  • Published : 2014.06.15
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Abstract

It is important to predict chlorine decay with different water purification processes and distribution pipeline materials, especially because chlorine decay is in direct relationship with the stability of water quality. The degree of chlorine decay may affect the water quality at the end of the pipeline: it may produce disinfection by-products or cause unpleasant odor and taste. Sand filtrate and dual media filtrate were used as influents in this study, and cast iron (CI), polyvinyl chloride (PVC), and stainless steel (SS) were used as pipeline materials. The results were analyzed via chlorine decay models by comparing the experimental and model parameters. The models were then used to estimate rechlorination time and chlorine decay time. The results indicated that water quality (e.g. organic matter and alkalinity) and pipeline materials were important factors influencing bulk decay and sand filtrate exhibited greater chlorine decay than dual media filtrate. The two-component second-order model was more applicable than the first decay model, and it enabled the estimation of chlorine decay time. These results are expected to provide the basis for modeling chlorine decay of different water purification processes and pipeline materials.

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