대한토목학회논문집 (KSCE Journal of Civil and Environmental Engineering Research)

  • 제41권5호
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  • Pages.493-504
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  • 2021
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  • 1015-6348(pISSN)
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  • 2799-9629(eISSN)
대한토목학회 (Korean Society of Civil Engeneers)
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순산소와 Vortex Aerator를 이용한 도심하천의 수질 및 악취 관리

Urban Streams' Water Quality and Odor Control Using Pure Oxygen and Vortex Aerator

  • 윤다인 (부산항만공사 항만건설실) ;
  • 최미정 (한국수자원공사 스마트워터 연구소) ;
  • 박성혁 (동아대학교 ICT융합 해양스마트시티 공학과)
  • 투고 : 2021.02.24
  • 심사 : 2021.05.11
  • 발행 : 2021.10.01
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초록

와류에 의해 물과 산소의 충돌을 반복적으로 일으켜 산소를 용존시키는 Multistage Vortex Aerator를 하천 정화에 적용하였다. 본 연구의 대상 현장인 괴정천은 부산시 사하구 도심을 흘러 낙동강 하구로 연결되는데, 우천 시에는 비점 오염물질이 유입되고 평시에도 하수 슬러지가 일부 유입되어 퇴적을 반복함에 따라 하천수의 용존산소 농도가 혐기성 상태에 가까웠다. 산소농도가 최소 0.1 ppm인 하천수를 흡입하여 22 ppm 이상으로 산소를 용존시켜 분당 1 m3을 순환시켰을 때, 하천에 나타나는 수질과 악취 변화를 2개월간 모니터링하였다. 운영 결과, 용존산소가 하천 전체적으로 약간 나쁨(4)~나쁨(5)에서, 좋음(1b)~보통(3) 등급으로 개선되었고, 총인 농도는 평균 76 % 감소되었다. 복합악취는, 하천 전체가 혐기화된 측정일에 최대 84.5 % 저감을 관찰할 수 있었다.

The target site, Goejeongcheon flows through downtown of Saha-gu, Busan and it connects to the Nakdong-gang estuary. But non-point pollutants and sewage sludge are partially flowing into the stream and deposited. As a result, dissolved oxygen concentrations of the stream were observed close to the anaerobic condition. Multistage Vortex Aerator was applied for restoring this urban stream. It dissolves oxygen by repeatedly causing collisions between water and oxygen by vortex flow. The changes in water quality and odor were monitored for 2 months while circulating 1 m3/min of water with 22 ppm dissolved oxygen. As a result of the operation, the dissolved oxygen was improved from slightly Bad (4)~Bad (5) to Good (1b)~Normal (3) grade, and the total phosphorus concentration was decreased by 76 % on average. In the case of complex odor, a maximum reduction of 84.5 % was observed on the day the entire river was anaerobic. Through this study, we evaluated the feasibility of applying pure oxygen and Vortex Aerator for the the stream restoration. It is expected that the results of this study can be used for full-scale design.

키워드

과제정보

이 논문은 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(No. 2017R1D1A1B03036522, No. 2021R1I1A3060770).

참고문헌

  1. Alp, E. and Melching, C. S. (2011). "Allocation of supplementary aeration stations in the Chicago waterway system for dissolved oxygen improvement." Journal of Environmental Management, Vol. 92, No. 6, pp. 1577-1583. https://doi.org/10.1016/j.jenvman.2011.01.014
  2. Campolo, M., Andreussia, P. and Soldatia, A. (2001). "Water quality control in the river Arno." Water Research, Vol. 36, No. 10, pp. 2673-2680. https://doi.org/10.1016/S0043-1354(01)00483-3
  3. Cho, J. W., Yoo, S. J., Kim, J. I., Son, J. Y. and Kwon, K. W. (2010) "Evaluation of aquatic environmental quality in the dong stream after supplying clean sea water." The Annual Report of Busan Metropolitan City Institute of Health & Environment, Vol. 20, No. 1, pp. 122-130 (in Korean).
  4. Cho, Y. M., Ryu, D. C., Yoo, P. J., Choi, M. S., Seol, S. S., Kim, S. H. and Lee, J. J. (2016). "Hydraulic characteristics of the tidal river Dongcheon in Busan city." Korean Society of Water Science and Technology, Vol. 24, No. 2, pp. 63-70 (in Korean). https://doi.org/10.17640/KSWST.2016.24.2.63
  5. DeMoyer, C. D., Schierholz, E. L., Gulliver, J. S. and Wilhelms, S. C. (2003). "Impact of bubble and free surface oxygen transfer on diffused aeration systems." Water Research, Vol. 37, No. 8, pp. 1890-1904. https://doi.org/10.1016/S0043-1354(02)00566-3
  6. Fayolle, Y., Cockx, A., Gillot, S., Roustan, M. and Heduit, A. (2007). "Oxygen transfer prediction in aeration tanks using CFD." Chemical Engineering Science, Vol. 62, No. 24, pp. 7163-7171. https://doi.org/10.1016/j.ces.2007.08.082
  7. Garrido-Baserba, M., Sobhani, R., Asvapathanagul, P., McCarthy, G. W., Olson, B. H., Odize, V., Al-Omari, A., Murthy, S., Nifong, A., Godwin, J., Bott, C. B., Stenstrom, M. K., Shaw, A. R. and Rosso, D. (2017). "Modelling the link amongst fine-pore diffuser fouling, oxygen transfer efficiency, and aeration energy intensity." Water Research, Vol. 111, pp. 127-139. https://doi.org/10.1016/j.watres.2016.12.027
  8. Gillot, S., Capela-Marsal, S., Roustan, M. and Heduit, A. (2005). "Predicting oxygen transfer of fine bubble diffused aeration systems-model issued from dimensional analysis." Water Research, Vol. 39, No. 7, pp. 1379-1387. https://doi.org/10.1016/j.watres.2005.01.008
  9. Huisman, J. L., Weber, N. and Gujer, W. (2004). "Reaeration in sewers." Water Research, Vol. 38, No. 5, pp. 1089-1100. https://doi.org/10.1016/j.watres.2003.11.025
  10. Kang, H. S. (2014). "Eco-river restoration and river management in response to climate change." Journal of the Korean Society of Civil Engineers, KSCE, Vol. 34, No. 1, pp. 155-165 (in Korean). https://doi.org/10.12652/Ksce.2014.34.1.0155
  11. Kang, H. S. (2019). "Analysis of the causes of flow stagnation and water pollution in Yeouido saetgang river." Journal of the Korean Society of Civil Engineers, KSCE, Vol. 39, No. 1, pp. 25-32 (in Korean). https://doi.org/10.12652/KSCE.2019.39.1.0025
  12. Kang, S. Y. (2015). Remediation of sediments using micro-bubble, Master Thesis, Seoul National University, Seoul (in Korean).
  13. Kim, J. H. and Jun, S. J. (2011). "Treatment of phosphorous in sewage and wastewater." Korean Industrial Chemistry News, Vol. 14, No. 5, pp. 12-21 (in Korean).
  14. Kim, J. S. (2015). Improvement of oxygen transfer rate by microbubble aeration in water, Master Thesis, University of Science and Technology (UST) (in Korean).
  15. Kim, J. Y., Park, S. H., Kim. S. H. and Park, H. K. (2006). "Laboratory-scale analysis of effect of plume spacing of air diffuser system on destratification efficiency." Environmental Technology, Vol. 27, No. 10, pp. 1145-1151. https://doi.org/10.1080/09593332708618728
  16. Kim, K. G., Choi, J. H., Kim, S. H., Kang, L. S., Shin, H. S. and Kim, S. D. (2019). "Analysis of the effect of bio-retention cells to improve water cycle and water quality in urban streams." Journal of Wetlands Research, Vol. 21, No. 3, pp. 224-235 (in Korean).
  17. Kim, S. H., Kim, J. Y., Park. H. K. and Park, N. S. (2010). "Effects of bubble size and diffusing area on destratification efficiency in bubble plumes of two-layer stratification." Journal of Hydraulic Engineering, Vol. 136. No. 2, pp. 106-115. https://doi.org/10.1061/(asce)hy.1943-7900.0000152
  18. Lee, S. J., Lee, S. E., Kim, S. H., Park, H. K., Park, S. J. and Yum, K. T. (2012). "Examination of critical factors related to summer chlorophyll a concentration in the sueo dam reservoir, Republic of Korea." Environmental Engineering Science, Vol. 29, No. 6, pp. 502-510. https://doi.org/10.1089/ees.2011.0070
  19. Ministry of Environment (MOE) (2020). 2019 Sewerage statistics, Sejong, Korea (in Korean).
  20. Rosso, D. and Stenstrom, M. K. (2005). "Comparative economic analysis of the impacts of mean cell retention time and denitrification on aeration systems." Water Research, Vol. 39, No. 16, pp. 3773-3780. https://doi.org/10.1016/j.watres.2005.07.002
  21. Rosso, D. and Stenstrom, M. K. (2006). "Economic implications of fine-pore diffuser aging." Water Environment Research, Vol. 78, No. 8, pp. 810-815. https://doi.org/10.2175/106143006X101683
  22. Woo, H. S. (2009). "River restoration, future river." Water for Future, Vo. 42, No. 1, pp. 55-63 (in Korean).
  23. Wojtowicz, P. and Szlachta, M. (2016). "Experimental investigation and prediction of oxygen transfer in vortex flow regulators." Chemical Engineering Journal, Vol. 287, pp. 337-349. https://doi.org/10.1016/j.cej.2015.11.035
  24. Yoo, J. Y., Kim, I. S., Kim, S. H., Ekpeghere Kalu, I. Chang, J. S. Park, Y. I. and Koh, S. C. (2017). "Eco-friendly and efficient in situ restoration of the constructed sea stream by bioaugmentation of a microbial consortium." Korean Journal of Microbiology, Vol. 53, No. 2, pp. 83-96 (in Korean). https://doi.org/10.7845/KJM.2017.7038
  25. Yoon, S. R. (2018). Effect of ultra fine bubble on nutrients release characteristics at the sediment-water interface, Master Thesis, Seoul National University, Seoul (in Korean).
  26. Yum, K. T., Kim, S. H. and Park, H. K. (2008). "Effects of plume spacing and flowrate on destratification efficiency of air diffusers." Water Research, Vol. 42. No. 13, pp. 3249-3262. https://doi.org/10.1016/j.watres.2007.06.035
  27. Zhou, X., Wu, Y., Shi, H. and Song, Y. (2013). "Evaluation of oxygen transfer parameters of fine-bubble aeration system in plug flow aeration tank of wastewater treatment plant." Journal of Environmental Sciences, Vol. 25, No. 2, pp. 295-301. https://doi.org/10.1016/S1001-0742(12)60062-X
  28. Zhuang, H., Hong, X., Han, H. J. and Shan, S. (2016). "Effect of pure oxygen fine bubbles on the organic matter removal and bacterial community evolution treating coal gasification waste-water by membrane bioreactor." Bioresource Technology, Vol. 221, pp. 262-269. https://doi.org/10.1016/j.biortech.2016.09.029