Centre for Freshwater Studies, Dundalk Institute of Technology, Dundalk, Co. Louth, Ireland.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2011;46(7):742-50. doi: 10.1080/10934529.2011.571592.
The nitrogen (N) removal performance of a 3.25 ha Integrated Constructed Wetland (ICW) treating domestic wastewater from Glaslough village in County Monaghan, Ireland, was evaluated in this study. The ICW consists of two sludge ponds and five shallow vegetated wetland cells. Influent and effluent concentrations of two N species, namely, ammonia-nitrogen (NH(3)-N) and nitrate-nitrogen (NO(3)-N), which were measured weekly over 2 years, together with hydrology of the ICW provided the basis for this evaluation. The influent wastewater typically contained 40 mg L(-1) NH(3)-N and 5 mg L(-1) NO(3)-N. Concentrations of N in the ICW effluent were typically less than 1.0 mg L(-1) for both species. Overall, a total load of 2802 kg NH(3)-N and 441 kg NO(3)-N was received by the ICW and a removal rate of 98.0 % and 96.9 %, respectively, was recorded. Average areal N loading rate (245 mg m(-2) d(-1) NH(3)-N and 38 mg m(-2) d(-1) NO(3)-N) had a significant linear relationship with areal N removal rate (240 mg m(-2) d(-1) and 35 mg m(-2) d(-1), respectively) for both species. The areal first-order N removal rate constants in the ICW averaged 14 m yr(-1) for NH(3)-N and 11 m yr(-1) for NO(3)-N. Temperature coefficients (θ) for N reduction in the ICW were lower and less than unity for NO(3)-N, suggesting that the variability in N removal by the ICW was marginally influenced by temperature.
本研究评估了爱尔兰莫纳亨郡格拉斯洛村的一个 3.25 公顷综合人工湿地（ICW）处理生活污水的氮（N）去除性能。该 ICW 由两个污泥池和五个浅植被湿地单元组成。每周测量两年内的两种 N 物种（氨氮（NH3-N）和硝酸盐氮（NO3-N））的进水和出水浓度，以及 ICW 的水文学为该评估提供了依据。进水废水中通常含有 40mg/L 的 NH3-N 和 5mg/L 的 NO3-N。ICW 出水中的 N 浓度通常两种物质均低于 1.0mg/L。总的来说，ICW 接收了 2802kg 的 NH3-N 和 441kg 的 NO3-N，分别记录了 98.0%和 96.9%的去除率。平均面积 N 负荷率（245mgm-2d-1的 NH3-N 和 38mgm-2d-1的 NO3-N）与面积 N 去除率（240mgm-2d-1和 35mgm-2d-1，分别）之间存在显著的线性关系。ICW 中 NH3-N 的面积一级 N 去除率常数平均为 14myr-1，NO3-N 的面积一级 N 去除率常数平均为 11m yr-1。ICW 中 N 还原的温度系数（θ）对于 NO3-N 较低且小于 1，表明 ICW 对 N 去除的变异性受温度的影响较小。
