高效垂直流人工湿地+多级生态塘深度处理污水厂尾水  

Advanced treatment of tail water from sewage plant by high-efficiency vertical flow constructed wetland-multistage ecological ponds

作　　者：段田莉 成功 郑媛媛 罗思义[1] 

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266033 [2]深圳市环境科学研究院,深圳518001

出　　处：《环境工程学报》2017年第11期5828-5835,共8页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07206-004)

摘　　要：采用高效垂直流人工湿地+多级生态塘组合工艺对污水厂尾水进行深度处理。研究发现,组合工艺进水流量为900 m3·d-1时为最优工况;在最优运行工况下组合工艺对污水处理厂尾水有显著的净化效果,对COD、NH3-N、TN和TP的去除效果可高达59.22%、81.06%、93.11%和55.81%,出水达到《地表水环境质量标准》(GB 3838-2002)Ⅳ类标准;生态塘能强化NH3-N和TN去除效果,可进一步除磷,降低富营养化风险;运行一年至少减少COD排放量9.85 t·a-1,NH3-N排放量1.73 t·a-1,TN排放量4.96 t·a-1,TP排放量0.16 t·a-1,具有良好的环境效益和经济效益。The combined vertical flow constructed wetland （VFCW）-multistage ecological pond system was used in high-efficiency, advanced treatment of sewage plant effluent. The optimal operating condition of the combined system was at the influent flow of 900 m3·d-1 ;the combined craft had high efficiency in advanced treating sewage plant effluent under the optimal operating condition. The removal rates of COD, NH3-N, TN, and TP were 59.22% , 81.06% , 93. 11% , and 55.81% ,respectively,and the water quality of the outflow met the Class-lV of（（ environmental quality standards for surface water））（ GB 3838-2002）. The results show that ecological ponds can greatly improve the removal efficiency of NH3-N and TN and further reduce phosphorus levels and the risk of eutrophication. The emissions of COD, NH3-N, TN, and TP could be reduced by 9. 85, 1.73, 4. 96, and 0. 16 t·a-1 , respectively, after one year of operation, emphasizing the environmental and economic benefits of the combined system.

关 键 词：垂直流人工湿地 生态塘 深度处理 组合工艺 尾水 

分 类 号：X703[环境科学与工程—环境工程]