水解-复合潜流人工湿地对农村生活污水脱氮研究

Treatment of Rural Domestic Wastewater Nitrogen Removal in Hydrolytic Tank-Vertical-Horizontal Subsurface Flow Constructed Wetland System

研究了水解池-垂直潜流-水平潜流人工湿地系统对云南省普洱市农村生活污水的处理,探讨了该系统对生活污水中CODCr、NH4+-N、NO3--N、TN的去除效果,并将水解池部分与湿地部分的处理效果进行了比较。结果表明,该系统对CODCr、NH4+-N、NO3--N、TN的总平均去除率分别为78%、89%、51%、85%,出水浓度分别<46、3.9、3.8、5.8 mg/L,达到了国家城镇污水处理厂污染物一级A类排放标准(GB18918-2002)。该系统对农村生活污水的处理效果较好,建设运行成本低廉,维护管理方便,适合农村地区生活污水处理的运用与推广。

An hydrolytic tank-vertical-horizontal subsurface flow constructed wetland system for treating rural domestic wastewater was studied in removal efficiency and mechanism for CODCr,NH4+-N,NO3——N,TN in Guangpo Village,Simao Town of Pu'er City.The hydrolytic tank part,which compared with vertical-horizontal subsurface flow constructed wetland,was also studied for explaining the functions of hydrolytic tank-vertical-horizontal subsurface flow constructed wetland system.The results showed that this system could remove 78%,89%,51%,and 85% of CODCr,NH4+-N,NO3——N and TN respectively,and the effluent concentration were not more than 46,3.9,3.8 and 5.8 mg/L for CODCr,NH4+-N,NO3——N and TN respectively,which were below the national discharge standard of pollutants for municipal wastewater of Class A level(GB18918-2002).Hence,this system is very effective in treating rural domestic wastewater,it is also material/energy-saving compared with central technical systems,thus,it is worth for popularization and application in rural domestic wastewater treatment.