沸石滤料曝气生物滤池处理水产养殖废水的工艺特性_蒋轶锋

第31卷第3期2010年3月环境科学ENVIRONMENTALSCIENCEVol.31,No.3Mar.,2010沸石滤料曝气生物滤池处理水产养殖废水的工艺特性蒋轶锋1,刘大华2,孙同喜1,陈建孟1(1.浙江工业大学生物与环境工程学院,杭州310032;2.浙江菲达脱硫工程有限公司,杭州310051)摘要:采用上流式沸石滤料曝气生物滤池(ZBAF)对水产养殖废水进行处理.结果表明,沸石的高效吸附作用可使系统获得快速启动,异养菌和硝化菌生物膜的成熟分别只需7d和25d;系统在水力负荷0.25m/h及气水比20∶1工艺条件下运行效能最佳,COD和NH+4-N去除率分别稳定在85%和70%左右.通过对ZBAF滤柱沿程水质、微生物等指标分析,异养菌和硝化菌主要聚居区分别在滤料层下端和上端,DO值的低谷位置可作为其聚居区分界线;生物量(磷脂-P)和生物活性(好氧速率)沿高程的分布大体一致,其最大值均出现在滤柱底部,分别为114.12nmol/g和0.67mg/(g·h).关键词:曝气生物滤池;水产养殖废水;沸石滤料;工艺特性;启动中图分类号:X703.1文献标识码:A文章编号:0250-3301(2010)03-0703-06收稿日期:2009-05-13;修订日期:2009-09-28基金项目:国家水体污染控制与治理科技重大专项(2008ZX07421-002,2008ZX07101-006-07,2008ZX07106-2-2);国家科技支撑计划专题项目(2007BZE58B07);浙江省重大科技专项(2007C13081);杭州市重大科技攻关项目(20062912A06);浙江工业大学重中之重学科开放基金项目(20080210)作者简介:蒋轶锋(1978～),男,博士,副教授,主要研究方向为高效生物脱氮除磷技术,E-mail:jyf@zjut.edu.cnProcessCharacteristicsofZeoliteMediaBiologicalAeratedFilterforTreatingAquacultureWastewaterJIANGYi-feng1,LIUDa-hua2,SUNTong-xi1,CHENJian-meng1(1.CollegeofBiologicalandEnvironmentalEngineering,ZhejiangUniversityofTechnology,Hangzhou310032,China;2.ZhejiangFeidaDesulfurizationEngineeringCo.Ltd.,Hangzhou310051,China)Abstract:Inthisstudy,anup-flowzeolitemediabiologicalaeratedfilter(ZBAF)wasdevelopedandemployedforthetreatmentofaquaculturewastewater.TheresultsshowedthatZBAFcouldstartupquicklyafter7dand25dinviewpointofmineralizationandnitrification.0.25m/hand20∶1werefoundtobetheoptimalhydraulicloadingandgas/waterratio,underwhicharound85%ofCODand70%ofNH+4-NwereremovedstablyintheZBAF.Throughanalysisofwaterqualityandmicroorganismalongtheflowdirection,theheterotrophicandnitrifyingpopulationoccupiedrespectivelyinthebottomandtopofthefiltercolumn,andlowerDOconcentrationwasregardedastheboundaryzoneforthesetwodifferentgroupsofchemotrophicbacteria.Thechangingprofilesofbiomass(phospholipid-P)andactivity(oxygenuptakerate)showedthesimilarmodealongtheheightofZBAF,andtheirmaximumvaluesof114.12nmol/gand0.67mg/(g·h)weredetectedatthebottomofthefilter.Keywords:biologicalaeratedfilter;aquaculturewastewater;zeolitemedia