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http://dx.doi.org/10.5338/KJEA.2018.37.1.08

Effect of Phosphorus Removal by Oyster Shell on Longevity of Constructed Wetlands  

Kim, Seong-Heon (Department of Agricultural Chemistry and Food Science & Technology & Institute of Agriculture and Life Science, Gyeongsang National University)
Kim, Hong-Chul (Department of Pharmaceutical Engineering, Gyeongnam National University of Science and Technology)
Park, Jong-Hwan (School of plant, Environmental and Soil Sciences, Louisiana State University Agricultural center)
Ryu, Seong-Ki (Department of Agricultural Chemistry and Food Science & Technology & Institute of Agriculture and Life Science, Gyeongsang National University)
Kang, Se-Won (Department of Bio-Environmental Sciences, Sunchon National University)
Cho, Ju-Sik (Department of Bio-Environmental Sciences, Sunchon National University)
Seo, Dong-Cheol (Department of Agricultural Chemistry and Food Science & Technology & Institute of Agriculture and Life Science, Gyeongsang National University)
Publication Information
Korean Journal of Environmental Agriculture / v.37, no.1, 2018 , pp. 66-72 More about this Journal
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.
Keywords
Constructed wetland; Longevity; Oyster shell; Phosphorus;
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Times Cited By KSCI : 2  (Citation Analysis)
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