【摘要】 基质是潜流式人工湿地污水处理系统的重要组成部分,直接影响到系统的处理效果。本文研究了由沸石、页岩陶粒和碎石3种不同基质构建的潜流式人工湿地对磷的去除效果。结果表明,在设计水力停留时间3 d,连续进出水情况下,碎石单元对磷的去除效果最好,页岩陶粒单元次之,沸石单元效果最差,平均去除率分别为95%、60%和35%。在潜流式人工湿地污水处理系统运行初期观察到磷释放现象,沸石单元最为明显。进水磷浓度较低时,磷的去除率随浓度升高而升高,当正磷、总磷浓度分别升高到2.4~2.5和3.1~3.3 mg/L时,正磷、总磷的去除率开始迅速下降。更多还原

【Abstract】 Substrates are of great importance in subsurface flow constructed wetlands because of their effects on removal efficiency.Effects of three different kinds of substrates（zeolite,shale ceramsite and detritus） on the phosphorus removal efficiency in subsurface flow constructed wetlands was investigated.The wetlands system was operated continuously with a hydraulic retention time of 3 days.The result shows that detritus had the highest P adsorption values,followed by shale ceramsite and zeolite.Their phosphorus removal efficiencies are 95%,60% and 35% respectively.The phenomenon of phosphorus releasing was observed at the incipience of the investigation especially in the unit of zeolite.The phosphorus removal efficiency increases with the upswing of phosphorus concentration in influent.But when PO^3-₄-P and TP concentration in influent increase to 2.4～2.5 mg/L,3.1～3.3 mg/L respectively,the removal efficiency of PO^3-₄-P and TP begins to decline rather abruptly.更多还原