Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
권호 표지
DOI QR코드

DOI QR Code

Study on the Standard Oxygen Transfer Efficiency Monitoring System in the Aeration Tank for Reuse and Discharge of Wastewater

하폐수의 재사용 및 방류를 위한 폭기조 내 표준산소전달 효율 모니터링 시스템에 관한 연구

  • Received : 2019.10.30
  • Accepted : 2019.11.27
  • Published : 2019.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this investigation, off-gas generated from the activated sludge in wastewater treatment plant was monitored. Through monitoring, the oxygen transfer efficiency in the aeration system and the reliability was evaluated by comparing to clean water. First, the dissolved oxygen, oxygen transfer coefficient, and standard oxygen transfer efficiency were measured based on clean water, and the values were 8.60 mg/L, 9.490/hr and 23.96%, respectively. The off-gas monitoring at the wastewater treatment plant indicated that the standard oxygen transfer efficiency was 22.81%. Little difference in oxygen transfer efficiency this data inferred that the performance was improved through diffuser installation in the field monitoring system.

본 연구에서는 활성 슬러지 하수처리장에서 배출되는 off-gas에 대한 포집 및 측정 모니터링을 통해 폭기조의 산소전달효율을 측정하고 청수와 비교하여 시스템의 신뢰성을 검증하는 연구를 수행하였다. 먼저, 청수를 기반으로 용존산소, 산소전달계수 및 표준산소전달효율을 측정하였으며 각각 8.60 mg/L, 9.49/hr, 23.96%의 값이 얻어졌다. 한편, 하수처리장 현장에서 진행한 off-gas 시험 결과 표준산소전달효율이 22.81%로 계산되어 청수와의 차이가 거의 없는 것으로 나타났다. 이는 현장에 설치된 산기관의 성능 및 폭기조의 상황을 모니터링 시스템을 이용해 실시간으로 확인함으로써 신뢰성있는 데이터를 확보할 수 있음을 의미한다.

Keywords

References

  1. Liu, C., Li, S., and Zhang, F., 2011 : The Oxygen Transfer Efficiency and Economic Cost Analysis of Aeration System in Municipal Waste Water Treatment Plant, Energy Proc., 5, pp.2437-2443. https://doi.org/10.1016/j.egypro.2011.03.419
  2. Kaliman, A., Rosso, D., Leu, S. Y., and Stenstrom, M. K., 2008 : Fine-Pore Aeration Diffusers: Accelerated Membrane Ageing Studies, Water Res., 42, pp.467-475. https://doi.org/10.1016/j.watres.2007.07.039
  3. Rozich, A. F., 1992 : Design and operation of activated sludge processes using respirometry, Lewis Publisher.
  4. Rosso, D., Larson, L. E., and Stenstrom, M., 2008 : Aeration of large-scale municipal wastewater treatment plants: state of the art, Wat. Sci. Tech., 57, pp.973-978. https://doi.org/10.2166/wst.2008.218
  5. Olsson, G. and Andrews, J. F., 1981 : Dissolved oxygen control in the activated sludge process, Wat. Sci. Tech., 13, pp.341-347.
  6. Harris, S. L., Stephenson, T., and Pearce, P., 1996 : Aeration investigation of biological aerated filters using off-gas analysis, Wat. Sci. Tech., 34, pp.307-314. https://doi.org/10.2166/wst.1996.0445
  7. Lewis, W. K. and Whitman, W. G., 1924 : Principle of gas absorption, Ind. Eng. Chem., 16, pp.1215-1220. https://doi.org/10.1021/ie50180a002
  8. Viswanathan, S., Pham, H., Kelly, R. F., Redmon, D. T., and Fernandes, W., 2008 : Evaluation of Oxygen Transfer Efficiency via Off-gas Testing at Full Scale Integrated Fixed film Activated Sludge Installation, In: Proc. WEFTEC 2008 Conference.
  9. Libra, J. A., Schuchardt, A., Sahlmann, C., Handschag, J., Wiesmann, U., and Gnirss, R., 2002 : Comparison of the efficiency of large-scale ceramic and membrane aeration systems with the dynamic off-gas method, Wat. Sci. Tech., 46, pp.317-324.
  10. Amerlinck, Y., Bellandi, G., Amaral, A., Weijers, S., and Nopens, I., 2016 : Detailed off-gas measurements for improved modelling of the aeration performance at the WWTP of Eindhoven, Wat. Sci. Tech., 74, pp.203-211. https://doi.org/10.2166/wst.2016.200