Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Effects of Operation Parameters on Pollutants Removal in a Lab-Scale Multi-Layered Soil Filtration System

하천 수질정화를 위한 실험실 규모 다단식 토양여과 시스템에서 오염물질 제거에 미치는 운전인자의 영향

  • Won, Se-Yeon (Center for Water Resource Cycler Research Center, Korea Institute of Science and Technology) ;
  • Ki, Dong-Won (Department of Civil, Environmental and Sustainable Engineering, Arizona State University) ;
  • Yoon, Min-Hyeok (Center for Water Resource Cycler Research Center, Korea Institute of Science and Technology) ;
  • Maeng, Sung-Kyu (Department of Civil and Environmental Engineering, Sejong University) ;
  • Ahn, Kyu-Hong (Center for Water Resource Cycler Research Center, Korea Institute of Science and Technology) ;
  • Park, Joon-Hong (School of Civil and Environmental Engineering, Yonsei University) ;
  • Song, Kyung-Guen (Center for Water Resource Cycler Research Center, Korea Institute of Science and Technology)
  • 원세연 (한국과학기술연구원 물자원순환연구단) ;
  • 기동원 (아리조나주립대학교 토목환경공학과) ;
  • 윤민혁 (한국과학기술연구원 물자원순환연구단) ;
  • 맹승규 (세종대학교 건설환경공학과) ;
  • 안규홍 (한국과학기술연구원 물자원순환연구단) ;
  • 박준홍 (연세대학교 사회환경시스템공학부) ;
  • 송경근 (한국과학기술연구원 물자원순환연구단)
  • Received : 2011.04.15
  • Accepted : 2012.02.24
  • Published : 2012.02.29
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Abstract

In this study we investigated the effects of operational parameters of a multi-layered soil filtration (filter depth, filtration velocity, and continuous/intermittent operation) on removal of pollutants in river water. As filter depth increased removal of all the pollutants (COD, TP, TN, and $NH_4$-N) was increased because the increase in filter depth increased in contact time between media and pollutants. The removal of TP and $NH_4$-N more increased with the increase in filter depth, comparing to the biological COD removal which was performed only in the top layer, since the removal mechanism of TP and $NH_4$-N was physicochemical process occurring throughout the whole layers. However, the reduction in filtration velocity resulted in decrease of removal all the pollutants removal due to shorter retention time. Biological COD removal was more influenced with the reduction in filtration velocity (longer retention time), than the removal of TP and $NH_4$-N. Because biological process was occurred only in the top layer which has relatively shorter retention time, comparing with physicochemical process occurred throughout whole media. Therefore, it is desirable that the operation parameters be controlled toward increasing retention time, in order to achieve efficient pollutants removal. The change in operation mode (continuos vs. intermittent operations) did not provide significant effects on the pollutant treatment efficiency by the multi-layered soil filtration system. Our findings suggest that for stable long-term operation it should be considered keeping conditions for biological activity and accelerating clogging.

본 연구에서는 하천의 수질오염물질을 처리하는 다단식 토양여과 시스템의 주요 운전인자인 여재 충전깊이, 선속도 및 연속 또는 간헐운전이 오염물질의 제거에 미치는 영향을 살펴보았다. 여재 충전깊이의 증가는 오염물질과 여재와의 접촉시간을 증가시켜 모든 항목의 제거효율을 증가시키는 역할을 하였다. 특히 물리화학적 제거에 기인하는 TP와 $NH_4$-N 항목의 제거효율이 상부의 생물학적 활성층에서의 제거에만 주로 기인하는 COD에 비하여 더 큰 증가를 보였다. 한편 선속도의 증가는 여재 내에서의 체류시간을 감소시키는 역할을 함에 따라 전반적인 제거효율의 저하를 가져왔으며, 특히 전체 여재층에 걸친 접촉시간에 영향을 받는 TP와 $NH_4$-N 항목에 비하여 표층부의 생물학적 제거에만 기인하는 COD의 경우는 상대적으로 큰 영향을 받는 것으로 나타났다. 따라서 오염물질의 효율적인 제거를 위해서는 체류시간을 증가시키는 방향으로 운전인자들을 조절하는 것이 중요할 것으로 판단된다. 연속운전과 간헐운전으로 운전방법을 달리하는 것은 모든 항목에서 큰 영향을 미치지는 않았으나, 안정적 운전을 위해서는 생물학적 조건의 유지와 막힘 현상의 가속화 등을 고려할 필요가 있다.

Keywords

References

  1. 환경부, "자연형 하천수질 정화기술 개발,"(2004).
  2. 신창민, 최지용, 박철휘, "도시지역에서의 토지이용별 비점오염물질 유출특성," 대한환경공학회지, 26(7), 729-735 (2004).
  3. Uhl, M. and Dittmer, U., "Constructed wetlands for CSO treatment: an overview of practice and research in Germany," Water Sci. Technol., 51(9), 23-30(2005).
  4. Chung, J.-B., Kim, S.-H., Jeong, B.-R. and Lee, Y.-D., "Removal of organic matter and nitrogen from river water in a model floodplain," J. Environ. Qual., 33, 1017-1023(2004). https://doi.org/10.2134/jeq2004.1017
  5. 손대희, 정윤철, 신정훈, 정진영, 안대희, "다단토양층을 이용한 하수처리에 관한 연구," 한국물환경학회지, 20(3), 215- 222(2004).
  6. 안규홍, 손동빈, 김승현, "하상여과 모형에서 유기물과 질소의 제거," 대한환경공학회지, 27(5), 525-534(2005).
  7. 김호석, 김승현, "홍수터여과에서 원수공급체계의 설계요소에 대한 실험연구," 대한환경공학회지, 31(11), 957-964 (2009).
  8. 하현수, 김상태, 김승현, 정종배, 정병룡, 이영득, 엄진석, 지승환, "홍수터 여과 모형을 이용한 하천수중의 유기물과 질소 제거," 한국응용생명화학회지, 45(2), 84-91(2002).
  9. 기동원, 조강우, 원세연, 송경근, 안규홍, "하천수질정화용 토양여과의 여과용량 증대와 수질 개선을 위한 친환경 여재 특성비교," 상하수도학회지, 24(4), 453-462(2010).
  10. Chen, X., Luo, A. C., Sato, K., Wakatsuki, T. and Masunaga, T., "An introduction of a multi-soil-layering system: a novel green technology for wastewater treatment in rural areas," Water and Environ. J., 23(4), 255-262(2009) https://doi.org/10.1111/j.1747-6593.2008.00143.x
  11. Sato, K., Masunaga, T. and Wakatsuki, T., "Water Movement Characteristics in a Multi-Soil-Layering System," Soil Science and Plant Nutrition, 51(1), 75-82(2005) https://doi.org/10.1111/j.1747-0765.2005.tb00009.x
  12. APHA, AWWA and WPCF, Standard Methods for the Examination of Water and Wastewater, 20th. Ed., APHA, Washington, D.C.(1998)
  13. Bunsri, T., Sivakumar, M. and Hagare, D., "Numerical modelling of tracer transport in unsaturated porous media," J. of Applied Fluid Mechanics, 1(1), 62-70(2008).
  14. 김승현, 정종배, 하현수, Prasher, O. S., "불포화 사질토양을 이용한 도시하수의 3차처리," 한국환경농학회지, 22(2), 111- 117(2003).
  15. Kim, S. H. and Corapcioglu, M. Y., "A kinetic approach to modeling mobile bacteria facilitated groundwater contaminant transport," Water Resour. Res., 32, 321-331(1996). https://doi.org/10.1029/95WR03242
  16. Chen, X., Sato, K., Wakatsuki, T. and Masunaga, T., "Effect of structural difference on wastewater treatment efficiency in multi-soil-layering systems: Relationship between soil mixture block size and removal efficiency of selected contaiminants," Soil Sci. and Plant Nutrition, 53, 206-214(2007). https://doi.org/10.1111/j.1747-0765.2007.00126.x
  17. Masunaga, T., Sato, K., Wakatsuki, T., Zennami, T., Fujii, S. and Wakatsuki, T., "Direct treatment of polluted river water by the multi-soil-layering method," J. Water and Environ. Technol., 1(1), 97-104(2003). https://doi.org/10.2965/jwet.2003.97
  18. Chi, N., Dong, B. and Liao Y., "Advanced phosphate removal by adsorption onto activated alum pocelain in simulation water," Bioinformatics and Biomedical Engineering (iCBBE), 4th International Conference on, 1-4, (2010).