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http://dx.doi.org/10.11001/jksww.2016.30.5.579

Study on characteristic for Larson's ratio of water treatment plants  

Min, Byung-dae (Water Supply and Sewerage Research Division, National Institute of Environmental Research Environmental Research Complex)
Chung, Hyen-mi (Water Supply and Sewerage Research Division, National Institute of Environmental Research Environmental Research Complex)
Ahn, Kyung-hee (Water Supply and Sewerage Research Division, National Institute of Environmental Research Environmental Research Complex)
Park, Ju-hyun (Water Supply and Sewerage Research Division, National Institute of Environmental Research Environmental Research Complex)
Publication Information
Journal of Korean Society of Water and Wastewater / v.30, no.5, 2016 , pp. 579-586 More about this Journal
Abstract
In many countries in order to manage corrosion of water treatment process, it is currently using Langelier index (LI). However, management of the Larson's ratio (LR) to compare corrosion management and LI which can be generated by the water treatment process is required. In this study, in order to ensure data LR, factors associated with the actual corrosion resistance of water treatment plant was measured. Using the measured data, the model equation can be estimated alkalinity, and using the statutory water quality data, LR and alkalinity is estimated. At comparison of the measured value and estimated value of alkalinity, it appeared in $R^2$ = 0.629, using the statutory water quality data and estimated alkalinity model, LR and alkalinity (Whole water treatment plants : 472) is estimated. Concentration of estimated alkalinity is 0.5 mg/L to 107.5 mg/L (average : 23.2 mg/L), and LR is 0.1 to 10 (average : 1.3). At tendency to corrosion of investigated LR, "No metal tendency" (>0.5) is 39 water treatment plants, 8.26 %, and "corrosion metal tendency" is 433 water treatment plants, 91.74%.
Keywords
Carbonate equilibrium; Correlation analysis; Corrosion index; Larson's ratio; Multiple regression;
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