经济植物型潮汐流人工湿地深度净化农村生活污水  

Characteristics of Tidal Flow Constructed Wetland with Economic Plants for Domestic Wastewater Tertiary Treatment

作　　者：何俊乐 吕锡武[1] 杨子萱[1,2] 徐丽[1,2] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096 [2]东南大学无锡太湖水环境工程研究中心,江苏无锡214000

出　　处：《水处理技术》2017年第12期105-110,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-竺山湾农村分散式生活污水处理技术集成研究与工程示范课题(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：研究利用水稻、水雍菜构建经济植物型潮汐流人工湿地,用以处理经"厌氧-缺氧-跌水充氧生物接触氧化"装置处置后的农村生活污水尾水,探讨该组合工艺中潮汐流人工湿地的最佳运行参数,验证经济植物型潮汐流人工湿地深度净化生活污水的可行性,并考察植物吸收对湿地氮磷去除的贡献,为植物的选取提供参考。结果表明:在实验条件下,控制湿地停留时间为12 h,空床时间6h,湿地对氮磷具有较好的去除效果;在进水COD、NH_4^+-N、TN及TP平均浓度分别为67.2、10.7、25.6、1.94 mg/L的条件下,两种植物湿地出水NH_4^+-N、TN含量均达到了GB18918-2002一级A标准,TP含量均达到GB 18918-2002一级B标准;湿地系统收获水稻"常优1号"0.73kg/m^2、水雍菜28.83 kg/m^2,在深度净化污水的同时可获得一定的经济效益;水稻对湿地系统氮磷去除的贡献率分别3.9%和6.8%,水雍菜为18.6%、30.1%,水雍菜较水稻对N、P有更强的去除能力;筛选植物时,在发挥一定生态效应的基础上,应优先挑选生物量大,收获次数多,经济效益高的作物。Two common economic plants tidal flow constructed wetland consists office and water spinach was designed during this research ,where the effluent from an anaerobic reactor ,anoxic denitrification tank ,water-dropping aeration biological contact oxidation devices was treated. On the one hand, the optimum operating parameters of the tidal flow constructed wetland in the combined process and the feasibility of tertiary treating domestic wastewater by the tidal flow constructed wetland was discussed and evaluated, on the other hand, the contribution ofplants to the removal ofnitrogen and phosphorus was analyzed,provide a reference for selecting plants. The results shows that when the HRT was 12 h and the idle time was 6h, the wetland has a good removal efficiency of nitrogen and phosphorus during the experiment. Average removal rates of NH4^＋-N, TN of the effluent from the two plants wetlands both met the class A standard of GB 18918- 2002, the TP of the effluent also met the class B with the concentrations of influent COD,NH4^＋-N,TN and TP of 67.2, 10.7, 25.6 and 1.94 mg/L ,respectively. The rice＂ Chang You 1＂ and water spinach production was 0.73 kg/m^2 and 28.83 kg/m^2 respectively, economic benefit was produced by the wetlands. The contribution rates of the rice to the removal of nitrogen and phosphorus of the wetlands were 3.9% and 6.8%,and the water spinach were 18.6%, 30.1%. The water spinach has a stronger ability to remove nitrogen and phosphorus than the rice; on the basis of exerting the needed ecological effect, the plants with large biomass, more harvest times, high economic benefit are the optimal choices in selecting plants.

关 键 词：潮汐流人工湿地 经济植物 生活污水 脱氮除磷 

分 类 号：X703.1[环境科学与工程—环境工程]