| In the water treatment plant, collected water was treated by precipitation, sedimentation -rapid sand filtration-chlorine disinfection it is supplied to each home by passing the water distribution system. But, the containment which was not completely removed in the existent water treatment process, is likely to cause the qualitative decline of treated water such as the multiplication of the microorganism. And, aging of the pipe is an important problem as an cause of the treated water qualitative decline. The investigation of the water quality change in the distribution system is important for control of treated water. This research reported the water quality change in distribution system, especially, about the place, pipe diameter change, pump station, distribution reservoir, and pre and post site of the storage tank on apartments or houses from H water treatment plant to SJ beach. The results of this study were summarized as follows. Chlorine injection quantify must be adjusted so that residual chlorine concentration may be become necessary minimum concentration, which prevent rising of THM and multiplication of the microorganism in the distribution system. |
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