인공습지를 이용한 축산폐수처리장에서 수생식물의 생육특성과 영양염류 흡수특성

Abstract

BACKGROUND: Constructed wetlands for wastewater treatment are vegetated by wetland plants. Wetland plants are an important component of wetlands, and the plants have several roles in relation to the livestock wastewater treatment processes. The objectives of this study were to investigate the growth characteristics and nutrient absorption of water plants in constructed wetlands for treating livestock wastewater. METHODS AND RESULTS: In this study, livestock wastewater treatment plant by constructed wetlands consisted of water plant filtration bed, activated sludge bed, vertical flow(VF), horizontal flow(HF) and HF beds. Phragmites communis TRINIUS(PHRCO) was transplanted in VF bed, Iris pseudoacorus L(IRIPS) was transplanted in HF bed and PHRCO, IRIPS and Typha orientalis PRESEL(THYOR) were transplanted in HF. Growth of water plants in constructed wetlands were the highest in October. The IRIPS growth was higher than other plant as 264 g/plant in October. The absorption of nitrogen and phosphorus by IRIS were 3.38 g/plant and 0.634 g/plant, respectively. The absorption of K, Ca, Mg, Na, Fe, Mn, Cu and Zn by water plants were higher in the order of IRIPS > THYOR > PHRCO. CONCLUSION(S): The absorption of nutrients by water plants were higher on the order of IRIPS > THYOR > PHRCO in constructed wetlands for treating livestock wastewater.