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Evaluation of Treatment Efficencies of Pollutants in Juksancheon Constructed Wetlands for Treating Non-point Source Pollution
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Evaluation of Treatment Efficencies of Pollutants in Juksancheon Constructed Wetlands for Treating Non-point Source Pollution
Choi, Ik-Won; Seo, Dong-Cheol; Kang, Se-Won; Lee, Sang-Gyu; Seo, Young-Jin; Lim, Byung-Jin; Park, Jong-Hwan; Kim, Kap-Soon; Heo, Jong-Soo; Cho, Ju-Sik;
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To evaluate the water quality in Juksancheon constructed wetlands for treating non-point source pollution, the removal rates of nutrients in water and the total amounts of T-N and T-P uptakes by water plants were investigated. Chemical characteristics of T-N and T-P in sediment were investigated. The concentrations of BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand), SS (Suspended Solids), T-N and T-P in inflow were 0.07~1.47, 0.60~2.65, 0.50~4.60, 1.38~6.26 and , respectively. The removal rates of BOD, COD, SS, T-N, and T-P were -10, 51, 66, -3 and 5%, respectively. The maximum amount of T-N uptake by water plants in August was in the treatment stage by Nymphoides peltata, in the treatment stage by Iris pseudacorus, in the treatment stage by Nymphaea tetragona GEORGI, respectively. The maximum amount of T-P uptake by water plants in August was by Nymphoides peltata in the treatment stage, by Iris pseudacorus in the treatment stage and by Nymphaea tetragona GEORGI in the treatment stage, respectively. Organic matter contents in sediments were not different. Contents of T-N and T-P in sediments were higher in spring. Microbial biomass C:N:P ratios in sediments in spring, summer, autumn and winter were 117~140:1~4:1, 86~126:5~6:1, 68~101:2~6:1 and 47~138:2~4:1, respectively. We could conclude that Juksancheon constructed wetlands show high removal efficiencies of COD and SS. However, improvements of management in winter season should be considered to improve the removal efficiencies of pollutants.
Juksancheon;Pollutants;Wetlands;Removal efficiency;
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