A simulation model of nitrogen transformation in reed constructed wetlands

Nitrogen has been considered as one of important elements in domestic wastewater and resulted in frequent algal blooms over a wide range of water body. In this study, a dynamic system was constructed to simulate nitrogen transformation in reed constructed wetlands. The various nitrogen forms in the system were considered as the parameters. The effects of mineralization, nitrification, denitrification, plant uptake and plant decay were investigated. The overall performance of the model was validated with different data sets of parameters from the case study spanning 3 years. The results indicated a good fit between the simulated and observed data. It appears that the model can give a reliable prediction for nitrogen removal performance in reed constructed wetland.