水景间歇复氧条件下护岸型湿地的水质净化效率  

Water purification effect of revetment wetland under condition of intermittent reoxygenation by waterscape

作　　者：王云中[1,2] 杨思超[2] 杨成建[2] 王天玉[2] 

机构地区：[1]西安建筑科技大学艺术设计学院,西安710055 [2]西安建筑科技大学环境与市政工程学院,西安710055

出　　处：《环境工程学报》2017年第6期3564-3569,共6页Chinese Journal of Environmental Engineering

基　　金：陕西省水利科技项目(2015slkj-17);陕西软科学研究计划项目(2016KRM083)

摘　　要：为改善缓流景观水体水质,通过搭建小试实验装置,研究了曝气处理、喷泉处理和跌水处理对护岸型湿地中污染物去除率的影响。结果表明,在水力停留时间(HRT)为4 d时,护岸型湿地对缓流景观水体中的总磷(TP)、总氮(TN)和化学需氧量(COD)平均去除率分别达到了48.63%、43.41%和68.51%;3组处理系统均通过间歇复氧促进了护岸型湿地对氮磷的去除,与空白处理相比,曝气处理、喷泉处理及跌水处理使得TP的去除率分别提高了13.59%、11.12%和14.42%,TN的去除率分别提高了10.32%、13.13%和8.88%,COD的去除率提高了24.82%、24.60%和23.09%;同时发现,4个处理系统对氮磷的去除率随温度的下降而降低。In order to improve the water quality of urban landscape water bodies, four lab-scale revetment wet- land systems were built and the effect of artificial aeration, fountain, and falling water processing systems on pol- lutant removal efficiencies were investigated. The average removal efficiencies of total phosphorus （TP） , total ni- trogen （TN） , and chemical oxygen demand （COD） were 48.63% , 43.41% and 68.51% , respectively, when the hydraulic retention time （HRT） was 4 days. All three processing systems promoted nitrogen and phosphorus removal efficiencies in the revetment wetland through intermittent reoxygenation. Compared with the blank sys- tem, the artificial aeration, fountain, and falling water processing systems improved the TP removal efficiency by 13.59% , 11.12% , and 14.42% , respectively, improved the TN removal efficiency by 10. 32% , 13. 13% , 8. 88% , respectively, and improved the COD removal efficiency by 24. 82% , 24.60% , 23.09% , respectively. Moreover, with a decrease in temperature, the removal efficiencies of nitrogen and phosphorus declined.

关 键 词：水景 护岸型湿地 间歇曝气 溶解氧 

分 类 号：X52[环境科学与工程—环境工程]