인공습지시스템을 이용한 폐양액처리장에서 오염물질의 정화효율 및 오염물질 분해속도

Abstract

In order to develop constructed wetlands for treating hydroponic wastewater in greenhouses, removal efficiencies and decomposition velocities of pollutants in constructed wetland were investigated for treating hydroponic wastewater. Removal rates of BOD, COD, SS, T-N and T-P in effluent in constructed wetlands were 88%, 79%, 92%, 64% and 92%, respectively. The decomposition velocities (K; day-1) of pollutants in 1st HF bed of constructed wetlands were higher in the order of SS (0.54 day-1) > BOD (0.39 day-1) > COD (0.27day-1) > T-P (0.26 day-1) > T-N (0.06 day-1). In 1st HF bed of constructed wetlands, the decomposition velocity of SS was rapid than that for BOD, COD, T-N and T-P in constructed wetland for treating hydroponic wastewater. The decomposition velocity (K; day-1) of pollutants in 2nd HF bed of constructed wetland were higher in the order of T-P (0.52 day-1) > BOD (0.28 day-1) > COD (0.15 day-1) > T-N (0.06 day-1) > SS (0.10day-1). In 2nd HF bed of constructed wetlands, the decomposition velocity of T-P was rapid than that for BOD,COD, SS and T-N in constructed wetland for treating hydroponic wastewater.