시설하우스 농업배수 처리를 위한 인공습지에서 여재종류, 조합방법 및 부하량에 따른 오염물질 정화효율 평가

To obtain optimum filter media, configuration method and greenhouse wastewater loading in small-scale constructed wetlands (CWs) for treating greenhouse wastewater, the apparatuses were constructed with 4 kinds of combined systems such as vertical flow (VH)-Horizontal flow (HF), HF-VH, HF-VF-HF, VFHF- HF CWs. The efficiencies of pollutants in greenhouse wastewater were investigated in various CWs under different filter media, configuration methods and agricultural water loading. Removal rates of pollutants under different filter media were in the other of coarse sand¤broken stone≒calcite≒mixed filter media for COD, broken stone¤mixed filter media¤coarse sand¤calcite for T-N, and calcite¤mixed filter media¤broken stone¤coarse sand for T-P. The removal rates of pollutants in HF-VH-HF CWs at different configuration methods were higher than those in other configuration methods. The removal rates of pollutants were higher in the order of 150 L m-2 day-1≒300 L m-2 day-1 ¤600 L m-2 day-1 under different greenhouse wastewater loading. Therefore, optimum configuration method was HF-VH-HF CWs, the optimum filter media was mixed filter media (coarse sand : broken stone : calcite=1 : 1 : 1), and the optimum greenhouse wastewater loading was 300 L m-2 day-1 in HF-VH-HF CWs.