Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Improvement of Turbidity Removal using the Two Stage Electroflotation-rising Process

2단계 전기부상-상승 공정을 이용한 탁도 제거 향상

  • 김동석 (대구가톨릭대학교 환경과학과) ;
  • 박영식 (대구대학교 자유전공학부)
  • Received : 2020.06.30
  • Accepted : 2020.09.07
  • Published : 2020.09.30
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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.

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References

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