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http://dx.doi.org/10.5322/JESI.2020.29.9.907

Improvement of Turbidity Removal using the Two Stage Electroflotation-rising Process  

Kim, Dong-Seog (Department of Environmental Science, Catholic University of Daegu)
Park, Young-Seek (Division of of Liberal Studies, Daegu University)
Publication Information
Journal of Environmental Science International / v.29, no.9, 2020 , pp. 907-914 More about this Journal
Abstract
In this study, the two-stage electroflotation-rising process was investigated with the aim of improving the performance of the conventional one-stage electroflotation process. A total of 32 min (the electroflotation and rising times were 30 min and 2 min, respectively,) was required when a current of 0.35 A was applied in the one-stage electroflotation-rising experiment. The amount of electric power required to treat 1 ㎥ of water was 1.75 kWh/㎥. For the two- stage system, the time required to achieve a turbidity removal rate of over 95% was 16 min (50% of the one-stage system). The amount of electric power required to treat 1 ㎥ of water was 0.59 kWh/㎥, which was only 33.7% of that required for the one-stage process. The total treatment time and electric power were excellent in case of the two-stage system in comparison with those of the one-stage process. The rate of turbidity removal for the horizontal electrode arrangement is 9.3% higher than that of vertical electrode arrangement. When Na2SO4 was used as the electrolyte, the optimum electrolyte concentration was 1.0 g/L.
Keywords
Electroflotation-rising; Stainless steel electrode; Turbidity; Two-stage treatment;
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Times Cited By KSCI : 4  (Citation Analysis)
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