Feasibility of Aquatic Plants (Eichhornia crassipes and Water dropwort) for Nutrients Removal

수생식물(부레옥잠 및 미나리)을 이용한 영양염류 제거에 관한 연구

  • Choi, Don-Hyeok (Sihwa Lake Environmental Management Center, Korea Water Resources Corporation) ;
  • Kang, Ho (Civil and Environmental Engineering, Chungnam National University) ;
  • Lee, Mi-Kyung (Sihwa Lake Environmental Management Center, Korea Water Resources Corporation)
  • 최돈혁 (한국수자원공사 시화호환경관리센터) ;
  • 강호 (충남대학교 토목환경공학부) ;
  • 이미경 (한국수자원공사 시화호환경관리센터)
  • Received : 2009.10.29
  • Accepted : 2010.01.15
  • Published : 2010.02.28

Abstract

Feasibility of floating aquatic plants (Eichhornia crassipes and Water dropwort) was investigated in order to control of sewage depending on various initial loading in a lab scale test. In addition, field test was conducted to assess the uptake rate of nutrient by E. crassipes. Lab-scale test applying primary domestic effluent operated at 4 day HRT shows that the highest uptake rates were 1.06 g N/$m^2{\cdot}day$ and 0.39 g P/$m^2{\cdot}day$ in the E. crassipes reactor. BOD removal efficiency in E. crassipes reactor was as high as 80% when the loading value was lower than 185 kg BOD/$ha{\cdot}day$. While 70 ~ 80% removal efficiency of BOD was achieved when the loading value was lower 80 kg BOD/$ha{\cdot}day$ at the W. Dropwort reactor. Experiment results show that E.crassipes has a higher nutrients removal efficiency than W. dropwort under high pollutant loading. Input loadings of TN and TP should not exceed to 10 kg TN/$ha{\cdot}day$ and 2.0 kg TP/$ha{\cdot}day$ respectively to provide a 50% TN and 80% TP removal efficiencies using E. crassipes. The field test demonstrated that an annual yield of E. crassipes mass was estimated as a fresh weight of 30.9 $m^3/ha{\cdot}yr$. E. crassipes grown in field pads absorbed 76.7 kg N/$ha{\cdot}yr$ and 13.4 kg P/$ha{\cdot}yr$ as a dry weight.

본 연구에서는 수생식물 중 부레옥잠(Eichhornia crassipes)과 미나리(Water Dropwort)를 이용하여 유입수의 부하변동에 따른 수처리 효율을 Lab-scale 실험을 통해 평가하고, 부레옥잠을 현장 적용하여 식물생체내 흡수된 질소, 인의 함량을 산정 제시하고자 하였다. 부레옥잠 식물체내 N, P 흡수율은 하수의 1차처리수를 적용하였을때 HRT 4 day에서 가장 높은 흡수율 1.06 g N/$m^2{\cdot}day$과 0.39 g P/$m^2{\cdot}day$으로 각각 나타났다. 부레옥잠의 경우, BOD 부하 185 kg BOD/$ha{\cdot}day$ 이하에서 80% 이상의 높은 효율을 보였으며, 미나리를 적용한 경우에는 80 kg BOD/$ha{\cdot}day$ 이하에서 70~80%의 효율을 나타냈다. 질소와 인의 처리효율 역시 부레옥잠이 미나리 보다 높은 부하에서도 처리 효율이 높은 것으로 나타났다. 부레옥잠을 이용하여 50% 이상의 TN 처리효율을 달성하기 위해서는 HRT 2 day 이상, 10 kg TN/$ha{\cdot}day$ 이하로 부하를 유지해야하고, TP의 경우, 80% 이상의 처리효율을 위해서는 TP 부하를 2.0 kg TP/$ha{\cdot}day$ 이하로 유지해야 하는 것으로 나타났다. 부레옥잠을 이용한 50일 동안의 현장적용 실험 결과로 부터 부레옥잠의 연중생산량은 30.9 $m^3/ha{\cdot}yr$로 나타났으며, 질소와인의 연간 흡수율은 76.7 kg N/$ha{\cdot}yr$, 13.4 kg P/$ha{\cdot}yr$로 높게 나타났다.

Keywords

References

  1. Campbell, C. S. and Ogden, M., "Constructed wetlands in the sustainable landscape", Wiley, New York(1999).
  2. Gopal, Br., "Natural and constructed wetlands for wastewater treatment: potentials and problems"Water Sci. Technol., 40(3), 27-35(1999). https://doi.org/10.1016/S0273-1223(99)00468-0
  3. Brix, H., "Do macrophytes play a role in constructed treatment wetlands?", Water Sci. Technol., 32(5), 11-17(1997).
  4. US Environmental Protection Agency "Constructed wetlands treatment of municipal wastewater: Manual", Office of Research and Development, National Risk Management Research Laboratory, Cincinnati, 166(2000).
  5. Zimmels, Y., Kirzhner, F. and Malkovskaja, A., "Application of Eichhhornia crassipes and Pistia stratiotes for treatment of urban sewage in Israel", J. Environ. Management, 81, 420-428(2006). https://doi.org/10.1016/j.jenvman.2005.11.014
  6. Zimmels, Y., Kirzhner, F. and Kadmon, A., "Effect of circulation and aeration on wastewater treatment by floating aquatic plants", Sep. purification Technol., 66, 570-577(2009). https://doi.org/10.1016/j.seppur.2009.01.019
  7. Whang, B. C. and Lee M. W. L., "Landscape ecology planning principles in Korea", Landscape and Ecological Engineering, 2(2), 147-162(2006). https://doi.org/10.1007/s11355-006-0014-8
  8. Wang, Q., Cui, Y. and Dong, Y., "Phytoremediation of polluted waters potentials and prospects of wetland plants", Acta Biotechnol., 22(1-2), 199-208(2002). https://doi.org/10.1002/1521-3846(200205)22:1/2<199::AID-ABIO199>3.0.CO;2-T
  9. 김영철, 정팔진, 안익성," 자연현상을 이용한 질산화 탈질공정에 의한 하수처리장 유출수의 질소제거", 대한환경공학회지, 27(3), 323-329(2005).
  10. 김영철, 정하영, 이진우," 산화재와 부유 수생식물에 의한 2차 처리수의 수질향상에 관한 연구", 대한환경공학회지, 25(8), 1022-1031(2003).
  11. WEF, Standard methods for the examination of water and wastewater, 20th Ed., 1998
  12. Kobayashi, J. T., Thomaz, S. M. and Pelicice, F. M.," Phosphorus as a limiting factor for Eichhhornia crassipes growth in the upper Parana River Floodplain", Wetlands, 28(4), 905-913(2008). https://doi.org/10.1672/07-89.1
  13. Lagos, C., Urrutia, R., Decap, J., Martinez, M. and Bidal, G., "Eichhornia crassipes used as tertiary color removal treatment for Kraft mill effluent", Desalination, 246(4), 45-54(2009). https://doi.org/10.1016/j.desal.2008.03.042
  14. Cornwell, D. A., Zolt Jr., J., Patrinely, C. D., Furman, T. and Kim, J. I., "Nutrient removal by water hyacinth"J. Water Pollut. Control Fed., 49, 57-65(1977).
  15. Dhote, S. and Dixit, S., "Water quality improvement through macrophytes-a review", Environment Monitoring and Assessment, 152, (1-4), 149-153(2009). https://doi.org/10.1007/s10661-008-0303-9
  16. Kawai, H., Uehara, M. Y., Gomes, J. A., Jahnel, M. C., Rossetto, R., Alem S. P., Riberio, M. D., Tinel, P. R. and Grieco, B. M., "Pilot-scale experiments in water hyacinth lagoons for wastewater treatment", Water Sci. Technol, 19, 129-173(1987).
  17. 이창복, 대한식물도감, 향문사(2003).
  18. Shimoda, Y., Takagaki, M., Thongbai, P., Ohyama, K. and Ozawa, K., "Improving water quality by using plants with water convolvulus (Ipomoea aquatica forks.) as a model, International Workshop on Greenhouse Environmental Control and Crop Production in Semi-Arid Regions, ISHS Acta Horticulturae, 797(2008).
  19. Woolfolk, W. T. M. and Friend, A. L., "Growth response of cottonwood roots to varied $NH_4:NO_3$ ratios in enriched patches", Tree Physiology, 23, 427-432(2003). https://doi.org/10.1093/treephys/23.6.427
  20. Toft, J. D., "Community Effects of the non-indigenous aquatic plant water hyacinth (Eichhornia crassipes) in the Sacramento/San Joaquin Delta, California, Master of science, University of Washington, 1-8(2000).