Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Comparison of Dissolved Air and Micro-Bubble Concentration by a Micro-Bubble Generating Pump

미세기포 발생 펌프에서 생성되는 기포농도와 용존공기농도의 비교

  • Lee, Chang-Han (Department of Environmental Administration, Catholic University of Pusan) ;
  • Ahn, Kab-Hwan (Department of Environmental Administration, Catholic University of Pusan)
  • 이창한 (부산가톨릭대학교 환경행정학과) ;
  • 안갑환 (부산가톨릭대학교 환경행정학과)
  • Received : 2014.08.04
  • Accepted : 2014.10.16
  • Published : 2014.11.28
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Abstract

The goal of this study was to evaluate micro-bubble concentration ($C_{air}$) in water by air/water ratio (A/W ratio) with a micro-bubble generating pump. The estimation of micro-bubble concentration is based on the balance of inlet/outlet air and water flow rate. On net A/W ratio to be generated micro-bubble, we found that the obtained the $C_{air}$ are shown as a function of discharge pressure ($P_g$) of the micro-bubble generating pump. The correlation of the $C_{air}$ and the $P_g$ ($C_{air}=3.261P_g-1.754$) was adequately described by the least square methods with a high correlation coefficient (r = 0.9459) and calculated values fit the experimental data quite well. The $C_{air}$ was lower than theoretical dissolved air concentration ($C_{aq}$) calculated by Henry's law. The $C_{air}$ for being operated the micro-bubble generating pump was 6.75 - 39.53 mL/L, however, we found that the optimum of the $C_{air}$ to generate micro-bubble was the range from 10 to 12 mL/L.

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References

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