Water corrosiveness depends mainly on the chemical factors of pH, alkalinity, Ca2 + concentration, dissolved oxygen, and total dissolved solids (TDS), and on the physical factors of temperature and flow velocity as well as pipe materials. The calcium carbonate precipitation potential (CCPP) control process and a simulated water distribution system (SWDS) were installed for a pilot-scale advanced water treatment process. The system was operated for 2 years. The CCPP control algorithm for anti-corrosion of a pipeline was developed and validated. The target CCPP value could be controlled by manipulating the pH and alkalinity with additions of sodium carbonate (Na2CO3) and carbon dioxide (CO2) where enough calcium was present. The CCPP range of 0 ∼ 4 mg L−1 was controlled reasonably to induce a calcium carbonate (CaCO3) film on the surface of the pipeline, which provided the anti-corrosion effect. The proper range required of pH and alkalinity used to manipulate the range of 0 ∼ 4 mg L−1 of CCPP was 8.0 ∼ 8.3, 70 ∼ 100 mg L−1 as CaCO3 when the Ca2 + concentration was in the range of 60 ∼ 80 mg L−1 as CaCO3, respectively, in this research. The effect of corrosion control was demonstrated by reduced iron and zinc concentrations released from the pipe material. This result might indicate the presence of the CaCO3 film and the efficacy of its anti-corrosion effect. However, the simple proportional integral derivative (PID) controller's sensitivity seemed to be in need of further improvement.
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November 2008
This article was originally published in
Journal of Water Supply: Research and Technology-Aqua
Article Contents
Research Article|
November 01 2008
Development and implementation of a corrosion control algorithm based on calcium carbonate precipitation potential (CCPP) in a drinking water distribution system Available to Purchase
Do-Hwan Kim;
Do-Hwan Kim
1Department of Environmental Engineering, Pusan National University, San 30, Changjeon-dong, Keumjeong-ku, Busan 609-735, South Korea
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Dong-Youn Kim;
Dong-Youn Kim
1Department of Environmental Engineering, Pusan National University, San 30, Changjeon-dong, Keumjeong-ku, Busan 609-735, South Korea
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Soon-Heon Hong;
Soon-Heon Hong
2Department of Industrial Civil, Pusan National University, Miryang Campus, 50 Cheonghak-ri, Samnangjin, Gyeongnam 627-706, South Korea
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Ji-Won Kim;
Ji-Won Kim
1Department of Environmental Engineering, Pusan National University, San 30, Changjeon-dong, Keumjeong-ku, Busan 609-735, South Korea
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Chang-Won Kim
1Department of Environmental Engineering, Pusan National University, San 30, Changjeon-dong, Keumjeong-ku, Busan 609-735, South Korea
E-mail: [email protected]
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Journal of Water Supply: Research and Technology-Aqua (2008) 57 (7): 531–539.
Article history
Received:
June 05 2007
Accepted:
November 09 2007
Citation
Do-Hwan Kim, Dong-Youn Kim, Soon-Heon Hong, Ji-Won Kim, Chang-Won Kim; Development and implementation of a corrosion control algorithm based on calcium carbonate precipitation potential (CCPP) in a drinking water distribution system. Journal of Water Supply: Research and Technology-Aqua 1 November 2008; 57 (7): 531–539. doi: https://doi.org/10.2166/aqua.2008.047
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