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Case Study on the Improvement of Pollutant Removal Efficiency in Sihwa Constructed Wetland  

Choi, Don-Hyeok (한국수자원공사 시화호환경환리센터)
Kang, Ho (충남대학교 토목환경공학부)
Choi, Kwang-Soon (한국수자원공사 수자원연구원)
Publication Information
Journal of Wetlands Research / v.12, no.2, 2010 , pp. 25-33 More about this Journal
Abstract
Three plans(induction of water flow, supply of oxygen into water, control of fish causing resuspension of solids) proposed to improve the pollutant removal efficiency of Sihwa Constructed Wetland(CW) were estimated by considering the their efficiency and application to the wetland. After construction of facility for induction of water flow in lower part(W 122m${\times}$L 103m) of the wetland, the mean removal efficiencies of BOD, SS, TN and TP were in range of 12.8~37.4% and BOD was showing the highest efficiency. This result indicates that water flows is one of very important factors in the pollutant removal of wetland, especially near the outlet of a large scale wetland such as Sihwa CW. Dissolved oxygen(DO) concentrations after operation of two oxygen supply systems such as Air Bubble Diffuser and Surface Aeration System increased 15.5% and 27.2%, respectively. For maintaining effective DO concentration in Sihwa CW, the operation of oxygen supply system may be desirable during midnight to dawn in the location in which DO concentration is not enough, for instance less than 2 mg/L in CW. In experiments of the fish removal from Sihwa CW, the mean turbidity was lower in test site(6.2 NTU) than control site(10.6). The removal efficiency of thurbidity by th fish removal from the wetland was 41.5%. Therefore, a relevant fish management through a periodical monitoring of fish and turbidity is needed.
Keywords
Constructed wetland; removal efficiency; improvement plans; case study;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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