净化湖水的垂直流人工湿地的脱氮研究

Nitrogen Removal in Lake Water Treated by Vertical Flow Constructed Wetland

将欧盟资助项目研究成果应用于实际工程中,以垂直流人工湿地净化湖水的应用工程作为研究对象,通过实例总结系统的脱氮效能,考察垂直流人工湿地（包括循环净化系统和补水净化系统）对湖水净化后水质的维护效果与应用前景,检验参数的合理性,并分析相关原因.结果表明,2种功能的垂直流人工湿地均达到了设计的脱氮效果,在水力负荷为1 000～2 000mm/d时,循环净化系统和补水净化系统总氮的平均去除率分别为37.8%和37.5%,氨氮的平均去除率分别为44.8%和43.6%.湖水经湿地净化后能维持较好的水质,能达到国家《地表水环境质量标准》（GB3838-2002）Ⅲ类标准.

Spensored by European Unite project, research of vertical flow constructed wetland （VFCW） was conducted to optimize the operating parameters. The result obtained from pilot tests was used in the design of a practical project, including one water-supply VFCW and one water-cycling VFCW, based on which the operational efficiency was systematically evaluated through long-term performance. Results of applied study indicated that the performance of the two VFCWs perfectly satisfied originally designed purposes. The average efficiencies in pollutants removal by water-supply VFCW and water-cycling VFCW were TN 37.8% and 37.5%, NH3-N 44.8% and 43.6% under the hydraulic load of 1 000 ～ 2 000 mm/d, respectively. Long-term performance of VFCWs greatly increased the lake water quality which met or even better than the third level of the surface water quality standard （GB3838-2002）.