Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
권호 표지

Oxygen Transfer Characteristics & Pure Oxygen Application Study on Circulation Flow Rate of the JLB (Jet Loop Bioreactor)

Jet 폭기 시스템의 순환유량에 따른 산소전달 특성 및 순산소 적용성 검토

  • Park, Noh-Back (National Academy of Agricultural Science, Rural Development Administration) ;
  • Song, Yong-Hyo (Department of Environmental Engineering, Chungbuk National University) ;
  • Pack, June-Gue (Department of Environmental Engineering, Chungbuk National University) ;
  • Jun, Hang-Bae (Department of Environmental Engineering, Chungbuk National University)
  • 박노백 (농촌진흥청 국립농업과학원) ;
  • 송용효 (충북대학교 환경공학과) ;
  • 박준규 (충북대학교 환경공학과) ;
  • 전항배 (충북대학교 환경공학과)
  • Received : 2009.07.17
  • Accepted : 2009.10.07
  • Published : 2009.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, in order to apply the air and pure oxygen in the Jet Loop Reactor (JLB) in which the oxygen transfer rate is high, differentiate the operation mode according to each air flowrate and liquid flowrate and investigate the oxygen transfer characteristic, an experiment was carried out. The oxygen concentration with the air flowrate ($Q_g$) and liquid flowrate ($Q_L$) was identical but the oxygen transfer coefficient ($K_L{\cdot}a$) is linear depending on degree of two factors. The width of an increase is small in $0.1min^{-1}$ when the air flowrate is 0.2 L/min with increasing the liquid flowrate. Whereas, the increment was exposed to be very high for $1.5min^{-1}$ when the air flowrate was 5 L/min. In the experiments using the pure oxygen, it was 30 mg/L of oxygen concentration finally and it was 3.5 times than using the air. But the time reached the saturated concentration was similar to using the air, and $K_L{\cdot}a$ was similar to using the air too. Analysis between two independent variable and oxygen transfer of the correlation is the same model like $K_L{\cdot}a={0.0161Q_L}^{1.5371}{Q_g}^{0.5433}$ using with coefficient non linear regression analysis. It was resulted that the liquid flowrate were approximately three times than air flowrate on effect to oxygen transfer rate.

Keywords

Acknowledgement

Supported by : 환경부

References

  1. 고광백, 박승룡, 임세호, 최상용, 신동록(2003). Off-gas method를 이용한 하수처리장 포기시스템 산소전달효율 측정 및 분석. 공동추계학술발표회 논문집, 대한상하수도학회·한국물환경학회, pp. 71-74
  2. Bloor, J. C., Anderson, G. K., and Willey, A. R. (1994). High rate aerobic treatment of brewery wastewater using the jet loop reactor. Water Research, 29(5), pp. 1217-1223 https://doi.org/10.1016/0043-1354(94)00310-4
  3. Calik, P., Yilgor, P., Ayhan, P., and Demir, A. S. (2004). Oxygen transfer effects on recombinant benzaldehydelyase production. Chem. Eng. Sci., 59, pp. 5075-5083 https://doi.org/10.1016/j.ces.2004.07.070
  4. Chen, J. H., Hsu, Y. C., Chen, Y. F., and Lin, C. C. (2003). Application of gas-inducing reactor to obtain high oxygen dissolution in aeration process. Water Research, 37, pp.2919-2928 https://doi.org/10.1016/S0043-1354(03)00084-8
  5. Farizoglu, B. and Keskinler, B. (2007). Influence of draft tube cross-sectional geometry on KLa and ε ing jet loop bioreactors(JLB). Chemical Engineering J., 133, pp. 293-299 https://doi.org/10.1016/j.cej.2007.02.022
  6. Garcia-Ochoa, F. and Gomez, E. (2009). Bioreactor scale-up and oxygen transfer rate in microbial processes: An overview. Biotechnology Advances, 27, pp. 153-176 https://doi.org/10.1016/j.biotechadv.2008.10.006
  7. Garcia-Ochoa, F., Gomez, E., and Santos, V. E. (2000). Oxygen transfer and uptake rates during xanthan gum production. Enzyme. Microb. Technol., 27, pp. 680-690 https://doi.org/10.1016/S0141-0229(00)00272-6
  8. Hughmark, G. A. (1967). Holdup and mass transfer in bubble columns. Ind Eng Chem Process Des Dev, 6, pp. 218-220 https://doi.org/10.1021/i260022a011
  9. Jamshidi, A. M., Sohrabi, M., Vahabzadeh, F., and Bonakdarpour, B. (2001). Hydrodynamic and mass transfer characterization of a down flow jet loop bioreactor. Biochemical Engineering Journal, 8, pp. 241-250 https://doi.org/10.1016/S1369-703X(01)00115-2
  10. Kawase, Y. and Hashiguchi, N. (1996). Gas-liquid mass transfer in external-loop airlift columns with Newtonian and non-Newtonian fluids. Chemical Engineering J., 62, pp. 35-42 https://doi.org/10.1016/0923-0467(95)03049-2
  11. Liu, Y. S., Wu, J. Y., and Ho, K. P. (2006). Characterization of oxygen transfer conditions and their effects on Phaffia rhodozyma growth and carotenoid production in shake-flask cultures. Biochemical Engineering Journal, 27, pp. 331-335 https://doi.org/10.1016/j.bej.2005.08.031
  12. Lubbecke, S., Vogelpohl, A., and Dewjanin, W. (1994). Wastewater treatment in a high-performance system with concentration biological high biomass. Water Research, 29(3), pp.793-802 https://doi.org/10.1016/0043-1354(94)00215-S
  13. Metcalf and Eddy (1991). Wastewater Engineering, McGraw-Hill, Inc
  14. Panja, N. C. and Phaneswara Rao, D. (1993). Measurement of gas-liquid parameters in a mechanically agitated contactor. Chemical Engineering J., 52, pp. 121-129 https://doi.org/10.1016/0300-9467(93)80061-R
  15. Petruccioli, M., Cardoso Duarte, J., Eusebio, A., and Federici, F. (2002). Aerobic treatment of winery wastewater using a jet-loop activated sludge reactor. Process Biochemistry, 37, pp. 821-829 https://doi.org/10.1016/S0032-9592(01)00280-1
  16. Roberts, P. V. and Dandllker, P. G. (1983). Mass transfer of volatile organic contaminants from aqueous solution to the atmosphere during surface aeration. Environ. Sci. Technol., 17(8), pp. 484-489 https://doi.org/10.1021/es00114a009
  17. Yagna Prasad, K. and Ramanujam, T. K. (1994). Enhancement of gas-liquid mass transfer in a modified reversed flow jet loop reactor with three-phase system. Chemical Engineering Science, 50(8), pp. 2997-3000 https://doi.org/10.1016/0009-2509(95)00149-Y
  18. Zamouche, R., Bencheikh-Lehocine, M., and Meniai, A. H. (2006). Oxygen transfer and energy savings in a pilot-scale batch reactor for domestic wastewater treatment. Desalination, 206, pp. 414-423 https://doi.org/10.1016/j.desal.2006.03.576