Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Oxygen Mass Balance Analysis in an Intermittently Aerated Wetland Receiving Stormwater from Livestock Farms

축산유역 강우유출수 처리를 위한 간헐 포기식 인공습지에서 산소수지분석

  • Guerra, Heidi B. (Department of Environmental Engineering, Hanseo University) ;
  • Park, Kisoo (Department of Environmental Engineering, Hanseo University) ;
  • Kim, Youngchul (Department of Environmental Engineering, Hanseo University)
  • Received : 2016.11.03
  • Accepted : 2016.11.16
  • Published : 2016.11.30
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Abstract

In order to assess the role of aeration in stormwater wetlands, oxygen supply and consumption in a wetland treating runoff from livestock farms were estimated and analyzed. Furthermore, oxygen mass balance was conducted during day time and night time. Internal production by algal photosynthesis dominated the oxygen production particularly in the shallow marsh due to the large amount of algae. Consequently, algal respiration was also the major oxygen depletion element with nitrification and biodegradation estimated as 5.35% and 6.43% of the total oxygen consumption. This excessive portion of oxygen consumption by algae was associated to the highly turbid water caused by the resuspension of sediment particles in the aeration pond, which also affected the subsequent wetland. Moreover, an abundance of oxygen was estimated during the day indicating that oxygen produced by algal activity is sufficient to meet the oxygen demand in the wetland. Thus, supplemental aeration was deemed not necessary at daytime. In contrast, oxygen was greatly depleted at night when algal photosynthesis stopped which induced denitrification. Therefore, it was suggested that supplemental aeration may be operated continuously instead of intermittently to avoid oxygen deficit in the wetland at night or it may be stopped entirely to further enhance denitrification.

축산지역 강우유출수 처리를 위한 간헐 포기식 인공습지에서 산소공급 및 소비량을 산출하여 낮과 밤 동안의 산소수지(oxygen balance)를 분석하였다. 조류의 광합성 활동이 활발한 얕은 습지에서 주간에는 내부 생산되는 산소가 지배적이었다. 또한 조류에 의한 내호흡이 가장 큰 소비원인 것으로 분석되었으며 질산화와 탈질에 의한 소비량은 각각 전체의 약 5.35%와 6.43%인 것으로 분석되었다. 조류에 의한 과도한 양의 산소소비는 포기조작에 의한 침전조류의 재부상에 의해 초래된 것으로 후속 공정에도 지속적으로 영향을 미쳤다. 더욱이 주간에 조류의 광합성 활동에 의해 생산된 풍부한 산소량은 습지에서 발생하는 산소요구량을 충족시키기에 충분한 것으로 분석되었다. 따라서 주간에 실시되는 인위적인 포기활동은 불필요한 조작으로 판명되었다. 이와 반면에 광합성 활동이 중단되는 야간에는 조류의 내호흡작용으로 습지내부의 산소농도가 크게 저하하였으며 이는 습지에서 탈질반응을 촉진하는 것으로 추정된다. 따라서 인위적인 포기를 중단해도 유기물질 제거나 질소제거에 큰 영향을 미치지 않을 것으로 판단되며, 야간에 혐기성 상태의 지속으로 악취와 같은 문제가 발생될 수 있으므로 간헐적인 모드로 운전하는 것이 타당할 것으로 판단된다.

Keywords

References

  1. Cloern, JE (1987). Turbidity as a control on phytoplankton biomass and productivity in estuaries. Continental Shelf Research, 7(11-12), pp. 1367-1381. https://doi.org/10.1016/0278-4343(87)90042-2
  2. Cosby, BJ, Hornberger, GM, Kelly, MG (1984). Identification of photosynthesis-light models for aquatic systems: II. Application to a macrophyte dominated stream. Ecological Modelling, 23(1-2), pp. 25-51. https://doi.org/10.1016/0304-3800(84)90117-0
  3. Dong, C, Zhu, W, Zhao, YQ, and Gao M (2011). Diurnal fluctuations in root oxygen release rate and dissolved oxygen budget in wetland mesocosm. Desalination, 272(1-3), pp. 254-258. https://doi.org/10.1016/j.desal.2011.01.030
  4. Fidelibus, MW and Mac Aller, RTF (1993). Methods for Plant Sampling. Restoration in the Colorado Desert: Management Notes, California Department of Transportation, San Diego, California, USA.
  5. Gaarder, T and Gran HH (1927). Investigations of the production of plankton in the Oslo Ford. International Council for the Explorations of the Sea. Copenhagen, Denmark.
  6. Gries, CL, Kappen, L and Losch, R (1990). Mechanism of flood tolerance in reed, Phragmites Autralis (Cav.) Trin. ex. Steudel, New Phytologist, 144(4), pp. 589-593.
  7. Higashino, M and Stefan, HG (2005). Oxygen demand by a sediment bed of finite length. J. of Environmental Engineering (ASCE), 131(3), pp. 350-358. https://doi.org/10.1061/(ASCE)0733-9372(2005)131:3(350)
  8. Hong, JS, Maniquiz-Redillas, MC, Ham, JH, Kim, LH (2016). Analysis of water quality improvement efficiency using constructed wetland in a coastal reservoir. J. of Wetlands Research, 18(3), pp. 292-300. https://doi.org/10.17663/JWR.2016.18.3.292
  9. Jamieson, TS, Stratton, GW, Gordon, R and Madani, A (2003). The use of aeration to enhance ammonia nitrogen removal in constructed wetlands. Canadian Biosystems Engineering, 45, pp. 1.9-1.14.
  10. Jespersen, DN, Sorrell, BK, and Brix, H (1998). Growth and root oxygen release by Typha latifolia and its effects on sediment methanogenesis. Aquatic Botany, 61(3), pp. 165-180. https://doi.org/10.1016/S0304-3770(98)00071-0
  11. Kadlec, RH and Wallace, SD (2009). Treatment Wetlands. CRC Lewis Publishers, New York.
  12. Kemp WM, Boynton, WR (1980). Influence of biological and physical processes on dissolved oxygen dynamics in an estuarine system: implications for measurement of community metabolism. Estuarine and Coastal Marine Science, 11 (4), pp. 407-431. https://doi.org/10.1016/S0302-3524(80)80065-X
  13. Lawson, GJ (1985). Cultivating Reeds (Phragmites Autralis) for Root Zone Treatment of Sewage, Contract report to the Water Research Centre (IRE Project 965), Cumbria, United Kingdom.
  14. Lopez, JLC, Porcel, EMR, Alberola, IO, Martin, MMB, Perez, JAS, Sevilla, JMF and Chisti, Y (2006). Simultaneous determination of oxygen consumption rate and volumetric oxygen transfer coefficient in pneumatically agitated bioreactors. Industrial and Engineering Chemistry Research, 45(3), pp. 167-1171.
  15. Lung, WS (2001). Water Quality Modeling for Wasteload Allocations and TMDLs. John Wiley & Sons, Inc., USA.
  16. MacPhee, NB, Gordon, R, Gagnon, GA, Stratton, GW, Blanchard, J, Wood, JD (2009). Evaluation of a Diffused Air Aeration System for a Constructed Wetland Receiving Dairy Wastewater. American Society of Agricultural and Biological Engineers, 52(1), pp. 111-119.
  17. Mara, D (2003). Domestic Wastewater Treatment in Developing Countries. Cromwell Press, Trowbridge, UK.
  18. Pratt, DM and Berkson H (1959). Two Sources of Errors in the Oxygen Light and Dark Bottle Method. Limnology and Oceanography, 5(3), pp. 328-334.
  19. Sartoris, JJ, Thullen, JS, Barber, LB and Salas, DE (2000). Investigation of nitrogen transformations in a southern California constructed treatment wetland. Ecological Engineering, 14(1-2), pp. 49-65. https://doi.org/10.1016/S0925-8574(99)00019-1
  20. Schwegler, BR (1978). Effects of Sewage Effluent on Algal Dynamics of a Northern Michigan Wetland. M.S. Thesis, University of Michigan (Ann Harbor).
  21. Sievers, DM (1997). Performance of four constructed wetlands treating anaerobic swine lagoon effluents. Transactions of the ASAE (American Society of Agricultural Engineers), 40, pp. 769-775. https://doi.org/10.13031/2013.21308
  22. APHA, AWWA, WEF (1995). Standard Methods for the Examination of Water and Wastewater 19th edn, American Public Health Association/American Water Works Association/Water Environment Federation, Washington DC, USA.
  23. Tchobanoglous, G and Schroeder, ED (1985). Water Quality. Addison-Wesley Publishing Company, Inc., Massachusetts, USA.
  24. USEPA (2000). Constructed wetlands: Agricultural wastewater, EPA 843/F-00/002, U.S. EPA Office of Water, Washington D.C.
  25. Wang, WC (1974). Effect of Turbidity on Algal Growth. Report ISWS-74-CIR21, Department of Registration and Education, Urbana, Illionois, USA.
  26. Werker, AG, Dougherty, JM, McHenry, JL, Van Loon, WA (2002). Treatment variability for wetland wastewater treatment design in cold climates. Ecological Engineering, 19(1), pp. 1-11. https://doi.org/10.1016/S0925-8574(02)00016-2
  27. Yao, F, Shen, G, Li X, Li, H, Hu, H, Ni, W (2011). A comparative study on the potential of oxygen release by roots of selected wetland plants. Physics and Chemistry of the Earth, 36(9-11), pp. 475-478. https://doi.org/10.1016/j.pce.2010.11.001
  28. Yu, J, Park, K, and Kim Y (2012) Characteristics of pollutants behavior in a stormwater constructed wetland during dry days. Frontiers of Environmental Science and Engineering, 6(5), pp. 649-657. https://doi.org/10.1007/s11783-012-0426-7