浸润线可控型人工湿地的生活污水脱氮除磷性能研究  

Study on Nitrogen and Phosphorus Removal from Domestic Sewage by Saturation-Line-Controlling Constructed Wetlands

作　　者：吴义福 吕锡武[1] 杨子萱[1,2] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096 [2]无锡太湖水环境工程研究中心,江苏无锡214135

出　　处：《水处理技术》2017年第12期89-94,共6页Technology of Water Treatment

基　　金："十二五"国家水体污染控制与治理科技重大专项(2012ZX07101-005);城郊集约型美丽乡村建设关键技术研究与示范(2015BAL01B01)

摘　　要：研究潜流人工湿地经"厌氧-缺氧-生物接触氧化池"生物处理后的生活污水尾水的氮磷去除效果,分析浸润线深度对种植不同植物的湿地单元氮磷去除率的影响。结果表明,低浸润度条件下,种植不同植物的湿地氮磷去除效果普遍较差,增加浸润线深度有利于污水中磷的去除。但就氮的去除而言,对于种植不同种类植物湿地,适宜的浸润线深度条件有所不同:空心菜和水稻根系发达,中浸润线深度条件下脱氮效果最好,而生菜根系相对短浅,高浸润线深度条件有利于其对氮的去除。植物吸收对氮磷去除贡献率分别是17.14%和41.44%,而这也可反映湿地系统氮磷资源化利用率。Nitrogen and phosphorus removal efficiency of effluent from domestic sewage treated by subsurface eonstrueted wetlands with ＇anaerobic reactoranoxic reactor - biological contact oxidation tank＇ was studied. And the effect of saturation line on nitrogen and phosphorus removal rate by constructed wetlandswithdifferent plants was analyzed. Theresults showed that, with condition of low saturation line, nitrogen and phosphorus removal efficiencywas generally poor, phosphorus removal rate increased with the increase of depth of saturation line. For nitrogen removal, the most suitable condition of saturation line ofconstructed wetlands with different plants was dissimilar. Water spinach andrice had well-developed root system andbest effect withmiddle depth of saturation line, root of lettuce was relatively short, high saturation line was advantageous to nitrogen removal. The contribution of plants absorption to nitrogen and phosphorus removal was 17.14% and 41.44% respectively, which could reflect utilization rate of nitrogen andphosphorus in wetland system.

关 键 词：潜流人工湿地 脱氮除磷 浸润线 生活污水 

分 类 号：X703.1[环境科学与工程—环境工程]