表面流与潜流式生态床处理农村污水  

Comparison Between the Free Water and Subsurface Flow Type Constructed Wetlands for Rural Sewage Treatment

作　　者：刘超翔[1] 胡洪营[1] 张健[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》2002年第11期5-8,共4页China Water & Wastewater

基　　金：国家科技部重大专项(2000-03)

摘　　要：　采用表面流和潜流式两种人工复合生态床对滇池地区低浓度农村污水进行的处理试验结果表明,在高水力负荷(30cm/d)条件下,潜流式床体对COD、TN、NH+4-N和TP的去除率分别为70.6%、60.6%、80.9%和66.0%,表面流床体则分别为63.1%、61.2%、90.2%和60.2%;表面流床体中芦苇、茭白等植物对氮、磷的吸收量要大于潜流式床体;潜流式床体依靠植物吸收去除的氮、磷量为1625kgN/(hm2·a)和148kgP/(hm2·a),表面流床体则为1999kgN/(hm2·a)和223kgP/(hm2·a)。In a pilot study,free water and subsurface flow type constructed wetlands were used for treatment of low strength rural sewage in the area of Dian-chi Lake.The test result showed that under high hydraulic loading rate (30 cm/d),the removal rate of COD,TN,NH+4-N and TP is respectively 70.6%,60.6%,80.9%,66.0% in the subsurface flow wetland and is 63.1%,61.2%,90.2%,and 60.2% in the free water wetland.It was also showed that the amount of nitrogen and phosphorus absorbed by hydrophyte in free water artificial wetland is greater than that in subsurface flow type wetland;in the latter the amount of nitrogen and phosphorus absorbed is respectively 1 625 kgN/(hm2·a) and 148 kgP/(hm2·a) ,and in the former is 1 999 kgN/(hm2·a) and 223 kgP/(hm2·a) respectively.

关 键 词：人工复合生态床 面源污染 农村污水 水生植物 

分 类 号：X703.1[环境科学与工程—环境工程]