【摘要】 为确定利用人工湿地在北方地区冬季运行所需的设计参数,利用在官厅水库岸边建立的人工湿地,开展了潜流人工湿地系统处理官厅水库水的冬季试验研究。结果表明,在寒冷的冬季,潜流人工湿地系统在隔离层保护下可以正常运行,使用不同的覆盖物进行隔离保温,对系统的处理性能有很大的影响,在水力负荷率为0.25～0.45m·d-1时,冬季CODMn和NH4+-N的去除率分别为15%和50%,BOD5、TN和TP的去除率分别为65%、25%和35%。去除率随水力负荷率的提高而降低,当水力负荷超过0.4m·d-1时,去除率明显降低。潜流人工湿地系统在冬季寒冷低温条件下对微污染地表水有较好的净化效果。更多还原

【Abstract】 To determine the designing parameters and the laws necessary for constructed wetland running in north area of China in winter, We studied experimentally the removal effect of BOD5, CODMn, P and N by subsurface flow wetland system in the reservoir in winter under the different conditions of hydraulic loading rate, using the artificial wetland built at the edge of Guanting Reservoir which reconstructed on the foundation of constructed wetland beginning to running in spring. The results indicated that the subsurface flow wetland system covered with heat- insulation stuff could operate normally in cold winter. The treatment capability of the system varied with heat- insulation stuff, and when the hydraulic loading rate was 0.25～ 0.45 m· d- 1 on average, the removal rates of CODMn, - N, BOD5, TN and TP were 15% , 50% , 65% , 25% and 35% , respectively. The removal rates decreased with the increase of hydraulic loading rate and decreased remarkably when the hydraulic loading rate exceeded 0.4 m· d- 1. These results demonstrated that the subsurface flow constructed wetland system could well purify the micro- polluted surface water at low temperature in winter.更多还原