不同回流比对无植物垂直流人工湿地除氮效果的影响_崔理华

第3卷第7期环境工程学报Vol.3,No.72009年7月ChineseJournalofEnvironmentalEngineeringJul.2009不同回流比对无植物垂直流人工湿地除氮效果的影响崔理华1,2,3郑离妮1楼倩1陈茵1朱文玲1(1.华南农业大学资源环境学院环境科学与工程系,广州510642;2.华南农业大学农业部生态农业重点开放实验室,广州510642;3.广东省高等学校农业生态与农村环境重点实验室,广州510642)摘要通过内碳源前置反硝化脱氮工艺试验,比较了不同回流比对垂直流人工湿地除氮效果的影响。试验结果表明,TN去除率随着回流比增加而增加,NH+4-N去除率则随着回流比的增加先降低后增加的趋势,两者去除率之和以回流比200%为最高,以回流比150%次之,以回流比100%为最低。从TN的去除率来看,回流比150%略高于回流比200%。关键词垂直流人工湿地氮去除回流比中图分类号X703.1文献标识码A文章编号1673-9108(2009)07-1170-05EffectofdifferentrecirculationratiosonremovalefficiencyofnitrogeninunplantedverticalflowconstructedwetlandsCuiLihua1,2,3ZhengLini1LouQian1ChenYin1ZhuWenling1(1.DepartmentofEnvironmentalScienceandEngineering,CollegeofNaturalResourcesandEnvironment,SouthChinaAgriculturalUniversity,Guangzhou510642,China;2.KeyLaboratoryofEcologicalAgricultureofMinistryofAgricultureofthePeople'sRepublicofChina,SouthChinaAgriculturalUniversity,Guangzhou510642,China;3.KeyLaboratoryofAgroecologyandRuralEnvironmentofGuangdongRegularHigherEducationInstitutions,Guangzhou510642,China)AbstractExperimentofthepreanoxicprocessforbiologicalnitrogenremovalwascarriedouttostudytheperformanceandhowtheeffectofdifferentrecirculationratiosontheremovalefficiencyofnitrogeninverticalflowconstructedwetland.TheresultsofthisexperimentshowedthattheremovalefficiencyofTNimprovedwiththeincreaseofrecirculationratio.TheremovalofefficiencyofNH+4-Ndecreasedwiththeincreaseofrecircula-tionatlowratios,butincreasedwiththeincreaseofrecirculationathighratios.Thesumoftheremovalefficien-ciesofTNandNH+4-Nofdifferentrecirculationratiosshowedthat200%recirculationratiowasthehighest,fol-lowedby150%recirculationratio,and100%recirculationratiowasthelowest.Ifonlyaccountedfortheremov-alefficiencyofTN,150%recirculationratiowasbetterthanthatof200%recirculationratio.Keywordsverticalflow;constructedwetland;nitrogenremoval;recirculationratio基金项目:国家自然科学基金资助项目(40871110,30828005,40571074);粤港招标项目(东莞专项:2006168402);广东省重大科技专项(2008A080800028)收稿日期:2008-09-21;修订日期:2008-10-26作者简介:崔理华(1963～),男,博士,教授,主要从事人工湿地污水生态处理系统