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DOI : , Vol.21, No.2, 15 ~ 28, 2013
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| Title |
| A Study on Calculation of the Pipe Wall Decay Constants of Residual Chlorine and Affecting Factors in Reclaimed Water Supply System |
| 이현동 Hyun Dong Lee , 박재현 Jae Hyun Park , 공명식 Myeong Sik Kong , 강성원 Sung Won Kang , 곽필재 Pill Jae Kwal , 이재영 Jai Young Lee |
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| Abstract |
| The experiments on the pipe wall decay constants of residual chlorine in reclaimed water under laboratory conditions using PVC pipe reactor was conducted. As a result of biofilm formation experiment, it was confirmed that there is a limit to the prevention of biofilm formation in water supply systems with PVC pipe, even though residual chlorine existed in reclaimed water. And it can be verified that biofilm as a major factor affects pipe wall decay constant. Under experimental condition, Kw ranged from 0.012 m/day to 0.20 m/day. Although the experiments used the same pipe material, Kw differs significantly in accordance with the conditions of water temperature, initial chlorine concentration, and pipe diameter. From the results of the effects of water temperature on wall decay constant, it was confirmed that the increase of water temperature results in the increase of bulk decay and wall decay constant. From the results of the effects of initial chlorine concentration on wall decay reaction, lower initial chlorine concentration showed higher bulk decay and wall decay constant regardless of water temperature and pipe diameter. From the results of wall decay constant according to pipe diameter, the increase of pipe diameter leads to the decrease of wall decay constant. |
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| Key Words |
| Reclaimed water, Residual chlorine, Bulk decay constant, Wall decay constant, Biofilm |
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