人工复合生态床的除污性能及流态  

Performance of Pollutants Removal and Flow Pattern of Constructed Wetland System

作　　者：刘超翔[1] 胡洪营[1] 孟远航[1] 黄霞[1] 施汉昌[1] 钱易[1] 

机构地区：[1]清华大学环境模拟与污染控制国家重点联合实验室,北京100084

出　　处：《中国给水排水》2003年第z1期13-16,共4页China Water & Wastewater

基　　金：国家科技部重大专项(2000-03)

摘　　要：　潜流式人工复合生态床对生活污水中COD和TP的平均去除率分别为85%和80%以上,对总氮去除率为55%左右。对床体沿程取样分析结果表明,在床体前1 3段对污染物的去除效果明显。采用氯化锂为示踪剂分析了该潜流式人工湿地的内部流态特征,得到的停留时间分布曲线介于理想推流和完全混合模型之间,其特点为早出峰,床体内存在一定的短流或死区。Subsurface flow type constructed wetland system used for domestic sewage treatment has average removal rate of COD and TP above 85% and 80% respectively,and removal rate of total nitrogen about 55%.The sample analysis result indicated that in the first 1/3 part of the system,it is more efficient in removal of pollutant.Lithium chloride,a conservative tracer,was used to analyze the flow pattern in the wetland,and it was found that the residence time distribution curve lies between ideal plug-flow and completely mixed model,with the characteristics of early appearance of peak,showing some short circuiting current or dead zone existing in the wetland.

关 键 词：潜流式人工湿地 生活污水 性能 流态 

分 类 号：X703[环境科学与工程—环境工程]