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http://dx.doi.org/10.4491/KSEE.2011.33.5.307

Effect of Calcium Sources for the Treatment of Wastewater Containing High Fluoride  

Kim, Seung-Ha (Department of Environmental Engineering, Chungbuk National University)
Kim, Keum-Yong (Department of Environmental Engineering, Chungbuk National University)
Ryu, Hong-Duck (Department of Environmental Engineering, Chungbuk National University)
Lee, Sang-Ill (Department of Environmental Engineering, Chungbuk National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.33, no.5, 2011 , pp. 307-313 More about this Journal
Abstract
As production of LCD increases, it has become necessary to find an economically efficient way of treating LCD wastewater with high concentration of fluoride. This study focuses on the calcium sources : $CaCl_2$, $Ca(OH)_2$ and $CaCO_3$ for the treatment of the LCD wastewater including high concentration of fluoride. Of course considering removal efficiency and economical aspect, study is continued. Then this study have objective giving aid to field. Consequently, each calcium source's removal efficiency was measured in various pH, calcium dosage, reaction time, and mixing intensity. The optimum operational conditions for $CaCl_2$ were found to be pH of 7, calcium dosage of 0.4[Ca]/[F] (mol / mol), 1 hr of operation and 200 rpm of mixing intensity. For $Ca(OH)_2$, they were pH of 7, calcium dosage of 30 mL/L, 1 hr of operation, and 200 rpm of mixing intensity. While $CaCO_3$ had operational conditions of pH of 4, calcium dosage of 30 mL/L, 1 hr operation and 200 rpm of mixing intensity. But it is recommended to use calcium sources according to various field conditions.
Keywords
Fluoride removal; LCD wastewater; Calcium Chloride anhydrous; Calcium hydroxide; Calcium Carbonate;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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