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A constructed wetland which was composed of aerobic and anaerobic areas was evaluated for 3 years to effectively treat the sewage produced in farming and fishing communities. For 3 years in a constructed wetland, biochemical oxygen demand(BOD), chemical oxygen demand(COD), suspended solids(SS), total nitrogen(T-N), and total phosphorus(T-P) in effluent were 0.211.8, 1.041.9, 1.16.5, 460 and 0.023.51 mg/L, respectively. Removal rate of BOD, COD and SS in effluent were 97, 92 and 99%, respectively, in the third year. As time goes by, removal rate of T-N and T-P in treated water in aerobic area and effluent were gradually increased in a constructed wetland. In the third year, removal rate in effluent were 62 and 73%, respectively. By the seasons, removal rate of BOD, COD, SS, T-N and T-P were 9798, 8791, 99, 4361 and 7686%, respectively. Removal rate of BOD, COD, SS and T-P were not affected by the seasons, but that of T-N in winter and spring were decreased than the other seasons.

hanguk hwangyeong nonghak hoeji/han'gug hwan'gyeong nonghag hoeji

Evaluation of Pollutant Removal Efficiency in Environmentally Friendly Full-scale Constructed Wetlands for Treating Domestic Sewage during Long-term Monitoring