화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
HWAHAK KONGHAK, Vol.40, No.3, 340-344, June, 2002
Export Citation
수질오염물질의 산화처리용 포기조에서 산소의 물질전달특성
Oxygen Transfer Characterization in Aeration Tank for Oxidation Treatment of Water Pollutants
백현창, 이은덕, 김근범, 박영성†
  • 대전대학교 환경공학과, 대전 300-716
Hyun Chang Baek, Eun Duk Lee, Geun Bum Kim, and Yeong Seong Park†
  • Department of Environmental Engineering, Daejeon University, Daejeon 300-716, Korea
E-mail:
초록
산화처리용 포기조에서 산소의 물질전달특성을 고찰하였다. 주요 실험변수로서 공기공급량(0.5-3.0 ℓ/min), 교반속도(0-1,000 rpm), 임펠러수(1-3), 액상온도(20-40 ℃) 등이 적용되었다. 공기공급량, 교반속도, 액상온도가 증가할수록 총괄물질전달계수는 증가하였으며, 특히 공기공급량과 교반속도의 증가는 기체체류량 증가와 기포분쇄에 따른 기-액 접촉면적의 증가를 통해 총괄물질전달계수에 커다란 영향을 주는 것으로 나타났다. 총괄물질전달계수는 임펠러수에 비례하여 증가함을 보였으며, 교반속도가 높을 때 총괄물질전달계수에 대한 임펠러수의 영향이 좀더 뚜렷해지는 것으로 나타났다. 또한 총괄물질전달계수는 임펠러수, 공기공급량, 액상온도, 교반속도 등의 조업변수를 토대로한 상관식으로 나타낼 수 있었다.
The oxygen transfer characteristics has been investigated in a designed aeration tank for oxidation treatment of pollutants. As operating variables, air flow rate(0.5-3.0 ℓ/min), rotation speed(0-1,000 rpm), number of impeller(1-3), and liquid temperature(20-40 ℃) were applied. The experimental results showed that overall mass transfer coefficient was increased with increasing air flow rate, rotation speed, and liquid temperature. Especially, air flow rate and rotation speed exhibited much distinct effect due to an increase of gas holdup and air-liquid contact area by bubble break. It was also found that overall mass transfer coefficient changes in proportion to number of impeller and the intensity of the effect is largely dependent on rotation speed. The correlational equation of overall mass transfer coefficient was obtained in terms of the operating variables such as impeller number, air flow rate, temperature, and rotation speed.
Keywords:Oxygen Transfer;Aeration Tank;Mass Transfer Coefficient;Impeller
  1. Woo KJ, Cho YJ, Kim KI, Kang Y, Kim SD, HWAHAK KONGHAK, 36(6), 937 (1998)
  2. Park CJ, J. KSEE, 20, 621 (1998)
  3. Kang Y, Min BT, Nah JB, Kim SD, HWAHAK KONGHAK, 28(5), 560 (1990)
  4. Han SW, Choi IG, Yun YW, Kim SY, HWAHAK KONGHAK, 31(5), 521 (1993)
  5. Kang YS, Kim JW, Lee WK, HWAHAK KONGHAK, 24(5), 371 (1986)
  6. Park YS, Lee ED, Kim GB, Lee HK, Energy Engg. J., 9, 123 (2000)
  7. Park CJ, J. KSEE, 18, 725 (1996)
  8. Kim JO, Kim SD, Part. Sci. Technol., 5, 309 (1987)
  9. Koh J, Kim B, Kim C, Lee J, Rhee B, HWAHAK KONGHAK, 30(1), 106 (1992)
  10. Yun YW, Kim SY, Kim DY, J. KSEE, 16, 365 (1994)
  11. Lee KH, Doh DS, HWAHAK KONGHAK, 31(4), 395 (1993)
  12. Kwon SG, Doh DS, HWAHAK KONGHAK, 23(1), 19 (1985)
  13. Lee DH, Kim JO, Han JH, Kim SD, HWAHAK KONGHAK, 31(1), 118 (1993)
  14. Choi IG, Paek JH, Han SW, Kim SY, HWAHAK KONGHAK, 35(2), 225 (1997)
  15. Lu WM, Wu HZ, Chou CY, "Effect of Impeller Blade Number on KLa in the Mechanically Agitated Vessels," Proceedings of the 6th Asian Conference on Fluidzed-Bed and Three-Phase Reactors, 167 (1998)
  16. Do JH, Thakur NN, Chang HN, Lee SY, Theor. Appl. Chem. Eng., 6, 1265 (2000)
  17. Kang JH, Lee CH, Haam SJ, Moon HM, Theor. Appl. Chem. Eng., 6, 1877 (2000)
  18. Lee MS, Kang JH, Haam SJ, Theor. Appl. Chem. Eng., 5, 1701 (1999)
  19. Choi KH, Han BH, Lee WK, HWAHAK KONGHAK, 28(2), 220 (1990)
  20. Joung OJ, Han SW, Kim SY, Theor. Appl. Chem. Eng., 5, 4169 (1998)
  21. Han SW, Choi IG, Kim SY, Theor. Appl. Chem. Eng., 5, 2441 (1996)
  22. Kim DJ, "Measurement of KLa in Bubble Column Formentation with Oxygen Enriched Air," Korea Advanced Institute of Science and Technology, Master Thesis (1996)
  23. Bird RB, Stewart WE, Lighfood EN, "Transport Phenomena," John Wiley & Sons, Inc., New York, 503 (1960)