本研究以試驗規模之表面流動式（free water surface）人工溼地直接處理污染性河水，探討人工溼地系統對氨氮之去除效能及控制參數之探討。此人工溼地實驗系統設立於台灣南部之之二仁溪河畔，面積為3.92 m ×1.94 m，以鋼板分隔成寬97 cm，總長7.96m之U型水道，水深控制於0.25 m，種植蘆葦。自2001年11月至2002年6月，以固定水力負荷0.05 m/d（水力停留時間4 d），連續入流操作。由水質分析結果顯示，進流水氨氮濃度1.86~14.53 mg/L，流經溼地後之出流水濃度下降至0~2.85 mg/L，氨氮平均削減76%。而其之一次動力學柱塞流反應模式（first-order plug flow kinetic），所求得之 k 與 kv20 分別為14.4 m/yr與0.198 day-1。此動力學模式將可提供人工溼地系統處理類似污染性水體之設計操作依據。 This study was treating the polluted river water directly using a pilot-scaled free water surface flow constructed wetland system, investigate the efficiency of ammonia-N removal and control parameters. The system was set up near the Erh-Ren River that is located in southern Taiwan . The system is 3.92m long 1.94m wide and 0.25 m
water depth, using a steel board to form a 97cm wide and total 7.96m long U type canal. From Nov 2001 to Jun 2002, the system was operated at steady hydraulic loading of 0.05 m/d (HRT= 4day) with continuous. Analytical results show that the inflow concentrations of ammonia-N influent 1.86 to 14.53 mg/L reduced ranged from to 0~2.85 mg/L, and the average removal efficiency is 76%. The first-order plug flow kinetic model of this system shows k and kv20 are 14.4 m/yr and 0.198 day-1, respectively. This kinetic model will provide a basis of sign and operation to treat the polluted river water in constructed wetland system.
