| Title |
Characteristics of Water Quality Improvement in Constructed Wetlands Under High Hydraulic Loadings |
| Authors |
박병흔(Byung Heun Park),남귀숙(Gui Sook Nam),이광식(Kwang Sik Lee) |
| Abstract |
The objectives of this study were to analyze the efficiencies of constructed wetlands under high hydraulic loadings. Constructed wetlands used for this study were composed of 5 planted wetlands in series. The system was operated with the condition of low concentrations and high hydraulic loadings. Average removal efficiencies(%) of pollutants in the wetlands were 49.2(BOD), 16.5(COD), 23.9 (T-N), 27.4 (T-P) and 51.5(Chl-a). And, average removal rates(g/㎡/d) were 3.71(BOD), 2.22(COD), 0.56 (T-N), 0.07 (T-P). Comparing this system with other wetlands operated at low hydraulic loadings and high level of water quality, the former could remove greater amount of pollutants by unit area than the latter, and vice versa in the case of removal efficiencies due to different hydraulic loadings. Pollutant removal rates were considered to be increased as influent loads got higher from the regression analysis for influent pollutant loads and removal rates. From these results, constructed wetlands are considered to have potential for removing pollutants even though hydraulic loadings were high. Therefore, constructed wetlands are thought to be a practical alternative to improve polluted stream water quality and non-point source pollution management. |