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우달식 ( Dal Sik Woo ),박한배 ( Han Bae Park ),채수권 ( Soo Kwen Chae ),영경택 ( Kyung Taek Yum ),이호선 ( Ho Sun Lee ) 한국수처리학회 2014 한국수처리학회지 Vol.22 No.5
Heavy metal concentrations from water treatment process to tap water supply are monitored at the two regions of the water treatment plants in this study. The variation trend of Iron(Fe), Zinc(Zn) concentrations showed a gradual increase through water treatment process, distribution reservoirs, water tanks, and a faucet. Especially, Fe and Zn increased dramatically in going through the reservoir and the faucet. It is explained that a seriously heavy metal leaching occurred in plumbing pipe systems. It is found that copper(Cu), lead(Pb), and manganese(Mn) were undetected and there are no differences from the initial concentrations during the water treatment process to the supply systems.
인산염계 부식억제제 주입이 배급수관내 미생물 재성장에 미치는 영향
우달식 ( Dal Sik Woo ),신성훈 ( Sung Hun Sin ),이호선 ( Ho Sun Lee ),황병기 ( Bung Gi Hwang ),채수권 ( Soo Kwen Chae ) 한국수처리학회 2013 한국수처리학회지 Vol.21 No.2
This study aims to measure the microorganisms attached in the steel pipe, stainless steel, STS 304, and PVC to find out the impact of the corrosion inhibitor on the microbial regrowth within the water pipe and at the same time compare the characteristics of biological film formation depending on the concentration of residual chlorine and the changes in the concentration of corrosion inhibitor. When the corrosion inhibitor was injected in the condition that the treatment water is more or less than TOC 2mg/L, the increase or decrease in the amount of attached microorganisms did not appear and the amount of attached microorganisms was less than the control group that the corrosion inhibitor was not injected. This means that phosphate components are not used as necessary nutrients for the growth of microorganisms in the condition that the concentration of organic matter is low and at the same time, is considered that the corrosion inhibitor formed the thin films on the surface of metal pipe to avoid the progression of corrosion, thus minimizing the growth environment where microorganisms like corrosion products are inhabitable.
상수도관 부식제어를 위한 pH 및 알칼리도 조절에 따른 수질인자 고찰
우달식 ( Dal Sik Woo ),신성훈 ( Sung Hun Sin ),이호선 ( Ho Sun Lee ),황병기 ( Bung Gi Hwang ),채수권 ( Soo Kwen Chae ) 한국수처리학회 2013 한국수처리학회지 Vol.21 No.2
The purpose of this study was to evaluate the water quality parameters by the pH and alkalinity adjustment for corrosion for corrosion control in water pipes. Ca(OH)2 used to adjust the pH was somewhat effective than NaOH for corrosion control in water pipes. The turbidity increase of alkaline chemicals was Ca(OH)2 >NaHCO3>Na2OH3>NaOH. The corrosion rate and iron concentration eluted in the carbon steel pipe coupons were decreased with increasing alkalinity. In conclusion, the alkaline chemicals to control of water pipes should be selected by considering maintenance, price economy and safety.