垂直流人工湿地净化湖水的除磷研究

Phosphorus Removal in Lake 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除磷效能,考察垂直流人工湿地对湖水净化后水质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,两种功能的垂直流人工湿地均达到了设计的除磷效果,在水力负荷为1000mm/d^2000mm/d时,两系统的平均去除率分别为TP:27.3%和49.1%,磷酸盐:20.1%和34.8%。湖水经湿地净化后能维持较好的水质,TP能达到地表水Ⅲ类标准。

Sponsored by European Unite project, research of vertical flow constructed wetland （VFCW） was con-ducted to optimize the operating parameters. The result obtained from pilot tests was used in the design of practical projects, including in a water- supply VFCW and a water- cycling VFCW, based on which, the operational efficiency was systematically evaluated through long-term performance. Results of applied studies 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 TP： 27.3% and 49. 1% , phosphate： 20. 1% and 34. 8% under the hydraulic load of 1000mm/d to 2000mm/d respectively. Long- term performance of VFCWs greatly increased the lake water quality which the total phosphorus met or even better than the third level of the surface water quality standard.