人工增氧型复合湿地污染物净化效果_潘继征

生态与农村环境学报2010,26(5):482-486JournalofEcologyandRuralEnvironment人工增氧型复合湿地污染物净化效果潘继征1,李文朝1,李海英2,柯凡1,3(1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,江苏南京210008;2.中国水利水电科学研究院,北京100038;3.中国科学院研究生院,北京100049)摘要:针对传统人工湿地负荷低、硝化能力弱和易堵塞的缺点,结合曝气生物滤池与人工湿地强化理论的研究成果,自主开发了人工增氧型复合湿地工艺,即生物接触氧化预处理+微曝气垂直流湿地+水平潜流湿地。通过对滇池北岸城郊混合制污水处理的模型试验,分析该工艺流程各净化单元的污染物去除效果。结果显示,人工增氧型复合湿地对不同水力负荷和污染负荷都体现了较强的缓冲调节能力和较高的净化效果。对污染物的总去除率分别为SS94.5%、CODCr71.3%、氨氮72.3%,在进水总氮10.0mg·L-1条件下实现了41.9%的总氮去除率,出水总氮均值为5.8mg·L-1。关键词:人工增氧;人工湿地;净化效果中图分类号:X-651;X82文献标识码:A文章编号:1673-4831(2010)05-0482-05PollutantRemovingEfficiencyofArtificiallyAeratedCompoundWetland.PANJi-zheng1,LIWen-chao1,LIHai-ying2,KEFan1,3(1.StateKeyLaboratoryofLakeScienceandEnvironment,NanjingInstituteofGeographyandLimnolo-gy,ChineseAcademyofSciences,Nanjing210008,China;2.InstituteofWaterResourceandHydropowerResearch,Beijing100038,China;3.GraduateUniversityofChineseAcademyofSciences,Beijing100049,China)Abstract:Combiningtheresearchtheoryofbiologicalaeratedfilterandconstructedwetland,anewtechnologyofartifi-ciallyaeratedintegratedconstructedwetlandisdevelopedtoavoidsuchshortcomingsofthetraditionalconstructedwetlandaslowhydraulicloading,weaknitrationcapacityandeasyclogging.Thistechnologycombinestheprocessesofpre-treat-mentofbio-contactoxidation,artificiallyaeratedverticalflowwetlandandhorizontalsubsurface-flowwetland.Thistech-nologydemonstratedexcellentefficiencywithenhancedcapabilityofpollutantremovinginanexperimentonthenorthshoreofDianchiLakeinYunnanProvince.Resultsshowthattheartificiallyaeratedintegratedconstructedwetlandreflectedastrongerbufferingcapacityandahigherpurifyingefficiencyregardlessofhydraulicloadandpollutionload.Thetotalre-movalrateofSS,CODCrandNH3-Nwasashighas94.5%,71.3%and72.3%,respectively,andthetotalnitrogenre-movalratewas41.9%whentheinflowwas10.0mg·L-1intotalNcontent,leaving5.8mg·L-1oftotalNintheoutflow.Keywords:artificialaeration;constructedwetland;removeefficiency基金项目:国家高技术研究发展计划(2005AA60101004);国家水体污染控制与治理科技重大专项(2008ZX07101-007-05);国家自然科学基金(41001324)收稿日