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2단계 전기부상-상승 공정을 이용한 탁도 제거 향상

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

한국환경과학회지 2020년 29권 9호 p.907 ~ 914
김동석, 박영식,
소속 상세정보
김동석 ( Kim Dong-Seog ) - Catholic University of Daegu Department of Environmental Science
박영식 ( Park Young-Seek ) - Daegu University Division of Liberal Studies

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 m3 of water was 1.75 kWh/m3. 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 m3 of water was 0.59 kWh/m3, 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.

키워드

Electroflotation-rising; Stainless steel electrode; Turbidity; Two-stage treatment

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