The present study sought to evaluate the efficiency and kinetics of nitrogen removal in Horizontal Subsurface Flow Constructed Wetlands (HSSF-CWs) cultivated with different plant species used in the treatment of swine wastewater (SWW), under different nitrogen loading rates (LR_TKN). For this purpose, nine tanks measuring 2.0 × 0.5 × 0.6 m were used, one maintained without plants (CW₁), while in the others two plant species were evaluated: CW₃, CW₅, CW₇, and CW₉ were planted with Tifton 85 grass (Cynodon spp.) and CW₂, CW₄, CW₆, and CW₈ were planted with cattail (Typha latifolia). The CWs received TKN application rates between 110 and 413 kg ha⁻¹ day⁻¹, and the removal efficiencies ranged from 27.6 to 44.9%. The average mass removal rates (MRR) for TKN and NH₄⁺ ranged from 45.3 to 115.9 kg ha⁻¹ day⁻¹ and 28.9 to 66.5 kg ha⁻¹ day⁻¹, respectively. Tifton 85 grass and cattail contributed, respectively, to 2.22 to 8.7% and 0.03 to 1.67% of the TKN mass removed by the CWs (MRR), equivalent to extraction rates of 2.72 to 4.94 kg ha⁻¹ day⁻¹ and 0.04 to 1.11 kg ha⁻¹ day⁻¹. Coefficients estimated by conventional, modified, and residual first-order models ranged from 0.017 to 0.0187 day⁻¹, 0.0691 to 0.1285 day⁻¹, and 0.0298 to 0.0715 day⁻¹, respectively. The modified first-order model and that with residual, due to their higher R² values (R² > 93%), indicated a good fit and considerable reliability of these equations to describe the processes of nitrogen removal from swine wastewater treated in HSSF-CW, and due to their mathematical simplicity and improvements in the representation of real behavior, they should be preferred for modeling of these systems.

本研究旨在评估在不同的氮负荷率（LR _TKN）下使用不同植物物种种植的水平地下流人工湿地（HSSF-CWs）的除氮效率和动力学，这些湿地用于养猪场废水（SWW ）。为了这个目的，九罐测量2.0×0.5×0.6 m的所使用的，一个保持而不植物（CW ₁），而在其它两种植物进行评价：CW ₃，CW ₅，CW ₇，和CW ₉种植了Tifton 85草（Cynodon spp。）和CW ₂，CW ₄，CW ₆和CW ₈种植有香蒲（香蒲）。连续水处理工人的TKN施用量在110至413 kg公顷^-1天^-1之间，去除效率为27.6至44.9％。TKN和NH ₄ ⁺的平均质量去除率（MRR）分别为45.3至115.9 kg ha ^-1天^-1和28.9至66.5 kg ha ^-1天^-1。Tifton 85草和香蒲分别贡献了化学武器去除的TKN量的2.22％至8.7％和0.03％至1.67％，分别相当于2.72至4.94 kg ha ^-1天^-1和0.04至1.11的提取率千克公顷^-1天^-1。通过常规的，改性的，和残留的一阶模型估算的系数范围为0.017到0.0187天^-1，0.0691至0.1285天^-1，和0.0298至0.0715天^-1分别。修改后的一阶模型和带有残留的模型（由于其较高的R ²值（R ²  > 93％））表明这些方程式很好地拟合并且具有相当高的可靠性，以描述从HSSF-处理过的猪废水中脱氮的过程CW，并且由于其数学上的简单性和对真实行为表示的改进，因此应首选使用它们来对这些系统进行建模。