厌氧氨氧化细菌在生物膜系统中起主要脱氮作用的模拟预测

文章编号:0253-2468(2004)06-1007-07中图分类号:X703文献标识码:A厌氧氨氧化细菌在生物膜系统中起主要脱氮作用的模拟预测郝晓地1,曹秀芹1,曹亚莉1,MarkvanLoosdrecht2(11北京建筑工程学院可持续环境生物技术研发中心,北京100044;21荷兰代尔夫特理工大学Kluyver生物技术实验室,代尔夫特2628BC,荷兰)摘要:废水有机物对亚硝化-厌氧氨氧化(ANAMMOX)生物膜系统的影响借助已建立的自养生物膜模型(CANON)与活性污泥3号模型结合进行了理论模拟.被结合的数学模型可以模拟生物膜中自养菌与异养菌活性以及所涉及的全部内在反应(碳氧化、硝化、反硝化、厌氧氨氧化).模拟显示,废水有机物对亚硝化-厌氧氨氧化生物膜系统影响不大;生长稳定的生物膜系统中异养菌反硝化不是脱氮的主反应(最大脱氮作用20%);厌氧氨氧化左右着脱氮功能.除废水中有机物可被全部去除外,当溶解氧最佳时,系统总氮去除率亦可高达90%.关键词:生物膜;亚硝化-厌氧氨氧化生物膜系统(CANON);厌氧氨氧化(ANAMMOX);碳氧化;硝化;反硝化Mode-lbasedpredictionofANAMMOXasmajorcontributiontoN-removalfrombiofilmsystemsHAOXiaodi1,CAOXiuqin1,CAOYali1,VanLoosdrechtMCM2(1.TheR&DCenterforSustainableEnvironmentalBiotechnology,BeijingInstofCivilEngineeringandArchitecture,Beijing100044;2.KluyverLaboratoryforBiotechnology,DelftUniversityofTechnology,Julianalaan67,2628BCDelft,theNetherlands)Abstract:AmodelevaluatinginfluenceofCODonapartialnitrification-ANAMMOXbiofilmprocessisincorporatedonthebasisoftheheterotrophicgrowthasdescribedinASM3,supplementedwithapreviouslypublishedmodelfortheautotrophicreactions(NitrificationandANAMMOX).ThisbiokineticmodelhasbeenincorporatedinthebiofilmcompartmentoftheAQUASIMsimulationsoftware.Thisincorporatedmodelcansimulatetheactivitiesofheterotrophsandautotrophsinvolvedinabiofilm,andrelatedreactionsbetweenCODoxidation,denitrification,nitrificationandANAMMOX,etc.canbequalitativelydemonstrated.SimulationsindicatethatCODintheinfluenthasnoimportantinfluenceonthepartialnitrification-ANAMMOXbiofilmprocess.BesidesefficientCODremoval,atotalnitrogenremovalefficiencyofabout90%couldbeexpected.Furthermore,ANAMMOXisamajorcontributortothetotalnitrogenremovalandconventionaldenitrificationonlytakesashareof<20%inthetotalnitrogenremoval.CODpresenceintheinfluentonlyincreasestheoptimalDOlevelforthemaximaldinitrogengasproduction.Withnormalloadsandworkingconditions,furthersimulationsrevealthattherecouldbeANAMMOXorganismsinnormalbiofilmsystems.Inotherwords,ANAMMOXmightbepresentinmanynitrifyingbiofilmsystems.Keywords:ANAMMOX;biofilm;