굴패각에 의한 인 처리가 인공습지의 수명에 미치는 영향
Effect of Phosphorus Removal by Oyster Shell on Longevity of Constructed Wetlands
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BACKGROUND: Constructed wetlands are low-cost alternatives for treating domestics sewage. However, previous study has reported that the removal of phosphorus in constructed wetlands was limited. Therefore, a new alternative was needed to extend the life of the constructed wetlands. The purpose of this study was to evaluate the effect of total phosphorus removal by oyster shell on longevity of constructed wetlands for treating domestic sewage. METHODS AND RESULTS: The changes of total phosphorus concentration and treatment efficiency in two constructed wetlands (CWs) classified as system A (coarse sand 100%) and system B (coarse sand 90%+oyster shell 10%) were investigated for 6 years. The actual saturation time of total phosphorus in the systems A and B was estimated to be longer than that of theoretical saturation by adsorption isotherm experiment. In particular, the saturation pattern of phosphorus in system A was maintained at a certain concentration level in the initial stage of operation, and finally saturation was reached as the saturation gradually progressed from the breaking point. In system B, the saturation period of phosphorus was prolonged as compared with system A due to the addition of oyster shells. CONCLUSION: Our results suggest that the longevity of the constructed wetlands can be extended due to the phosphorus saturation by adding the oyster shells to the coarse sands in constructed wetlands.
Abstract
BACKGROUND: Constructed wetlands are low-cost alternatives for treating domestics sewage. However, previous study has reported that the removal of phosphorus in constructed wetlands was limited. Therefore, a new alternative was needed to extend the life of the constructed wetlands. The purpose of this study was to evaluate the effect of total phosphorus removal by oyster shell on longevity of constructed wetlands for treating domestic sewage. METHODS AND RESULTS: The changes of total phosphorus concentration and treatment efficiency in two constructed wetlands (CWs) classified as system A (coarse sand 100%) and system B (coarse sand 90%+oyster shell 10%) were investigated for 6 years. The actual saturation time of total phosphorus in the systems A and B was estimated to be longer than that of theoretical saturation by adsorption isotherm experiment. In particular, the saturation pattern of phosphorus in system A was maintained at a certain concentration level in the initial stage of operation, and finally saturation was reached as the saturation gradually progressed from the breaking point. In system B, the saturation period of phosphorus was prolonged as compared with system A due to the addition of oyster shells. CONCLUSION: Our results suggest that the longevity of the constructed wetlands can be extended due to the phosphorus saturation by adding the oyster shells to the coarse sands in constructed wetlands.
참고문헌 (19)
- Diazo, A., "Solubility of inorganic P in stream water as influenced by pH and Ca concentration", Water Research, 28(8), pp.1755~1763 (1994)[DOI]
- Greenway, M., "Constructed wetlands in Queensland: performance efficiency and nutrient bioaccumulation", Ecological engineering, 12(1-2), pp.39~55 (1999)[DOI]
- Hawkins, W. B., "Design and construction of wetlands for aqueous transfers and transformations of selected metals", Ecotoxicology and Environmental Safety, 36, pp.238~248 (1997)[DOI]
- Johansson, L., "Industrial by-products and natural substrata as phosphorus sorbents", Environmental Technology, 20(3), pp.309~316 (1999)[DOI]
- Kadlec, R. H., "Treatment Wetlands", pp.1~1020 (2009), CRC Press
- 이홍재, "인의 흡착능 평가를 통한 인공습지 하수처리 시스템의 여재 선발", 한국환경농학회지, 22(2), pp.10~ (2003), 한국환경농학회
- Mann, R. A., "Phosphorus adsorption and desorption characteristics of constructed wetland gravels and steelworks by-products", Soil Research, 35(2), pp.375~384 (1997)[DOI]
- Newbold, J. D., "Phosphorus dynamics in a woodland stream ecosystem: a study of nutrient spiralling", Ecology, 64(5), pp.1249~1265 (1983)[DOI]
- Park, J. H., "Enhancement of phosphorus removal with near neutral pH utilizing steel and ferronickel slags for application of constructed wetlands", Ecological Engineering, 95, pp.612~621 (2016)[DOI]
- Reddy, K. R., "Phosphorus retention in streams and wetlands: a review", Critical Reviews in Environmental Science and Technology, 29(1), pp.83~146 (1999)[DOI]
- Reddy, K. R., "Biogeochemistry of wetlands: science and applications" (2008), CRC press
- Richardson, C. J., "Effective phosphorus retention in wetlands: fact or fiction. Constructed Wetlands for Water Quality Improvement", pp.271~282 (1993)
- Richardson, C. J., "Phosphorus biogeochemistry in sub-tropical ecosystems, The role of wetlands in storage, release, and cycling of phosphorus on the landscape: a 25-year retrospective", pp.47~68 (1999), Lewis Publishers
- Seo, D. C., "Phosphorus retention capacity of filter media for estimating the longevity of constructed wetland", Water Research, 39(11), pp.2445~2457 (2005)[DOI]
- Seo, D. C., "Evaluation of a hybrid constructed wetland for treating domestic sewage from individual housing units surrounding agricultural villages in south korea", Journal of Environmental Monitoring, 11(1), pp.134~144 (2009)[DOI]
- 서동철, "시설하우스 폐양액 주입방법 및 여재 특성에 따른 인공습지에서 수질오염물질의 처리효율", 한국환경농학회지, 29(2), pp.146~151 (2010), 한국환경농학회
- Siedel, K., "Zur problematik der keim-und pflanzengewasser", Verh. Internat. Verein. Limnology, 14, pp.1035~1039 (1961)
- Tanner, C. C., "Relationships between loading rates and pollutant removal during maturation of gravel-bed constructed wetlands", Journal of Environmental Quality, 27(2), pp.448~458 (1998)
- Vymazal, J., "Removal nutrients in various types of constructed wetlands", Science of Total Environment, 380(1-3), pp.48~65 (2007)[DOI]