自动增氧型潜流人工湿地处理农村生活污水的研究

Treatment of rural domestic sewage with self-aeration subsurface constructed wetland

采用人工配水模拟太湖地区农村生活污水水质,利用改进的自动增氧型潜流人工湿地对其进行处理,结果表明:COD、NH+4N、TP进水浓度分别在132.4～392.6mg·L-1、21.58～50.26mg·L-1、3.60～13.17mg·L-1范围内变化时,COD、NH+4N、TP的去除负荷随着进水浓度的升高而增大,其最高去除负荷分别为226.38kg·d-1·hm-2、44.40kg·d-1·hm-2、10.44kg·d-1·hm-2,相应的去除率为89.45%、88.93%、90.25%,且系统有较强的抗冲击负荷能力.

The synthetic wastewater, simulating the water quality of rural domestic sewage in Tai Lake watershed, was treated with improved self-aeration subsurface constructed wetland. The experiment results indicated that, in the range of influent wastewater concentrations which were 132.4-392.6, 21.58-50.26, 3.60-13.17mg. L^-1 for COD, NH4^＋-N, TP, respectively, the removal loadings of COD, NH4^＋-N and TP increased as the increasing of influent wastewater concentration, which were 226.38, 44.40,10.44kg·d^-1·hm^-2, respectively ; the corresponding removal rates were 89.45% , 88.93% ,90.25% ,respectively. and the process can resist the loading fluctuation.