脉冲SBR处理城市污水深度脱氮的工艺特性_郭建华

中国环境科学2007,27(1)：62~66ChinaEnvironmentalScience脉冲SBR处理城市污水深度脱氮的工艺特性郭建华1,彭永臻1,2*,杨庆2,杨岸明2(1.哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090；2.北京工业大学北京市水质科学和水环境恢复工程重点实验室,北京100022)摘要：采用脉冲式SBR法,对城市污水进行了深度脱氮试验研究.从理论上分析了进水次数和进水量对脉冲式SBR工艺运行特性的影响,得出了脱氮效率公式,并通过试验研究了这些因素对工艺运行的实际影响.理论分析表明,在不投加外碳源的情况下,随着进水次数的增加,脱氮效率依次增加.根据进水C/N的高低,进水方式可分为不等量递增进水、等量进水和不等量递减进水.试验表明,当原水中有机碳源充足时,不等量递减的进水方式相对于等量的进水方式投加较少的外碳源就能实现深度脱氮；随着进水次数的增加,外碳源的投量依次减少,但操作变得复杂,对于普通的城市污水建议采用3次等量的进水方式.采用脉冲式SBR只需投加少量外碳源就可以使处理后的城市污水出水TN低于2mg/L,TN平均去除率达到97.3%.关键词：生物脱氮；脉冲式SBR法；分段进水；进水方式中图分类号：X703文献标识码：A文章编号：1000-6923(2007)01-0062-05ThecharacteristicsofthepulsedSBRforadvancednitrogenremovalofmunicipalwastewater.GUOJian-hua1,PENGYong-zhen1,2*,YANGQing2,YANGAn-ming2(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China；2.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China).ChinaEnvironmentalScience,2007,27(1)：62~66Abstract：ThepulsedSBR,anoveltechniquewasadoptedtotesttheadvancednitrogenremovalwithrealmunicipalwastewater.TheinfluenceoffeedfrequencyandamountontheoperationalcharacteristicsofpulseSBRtechniquewasstudiedtheoreticallyandthenitrogenremovalefficiencyformulawasobtained;andthepracticalinfluenceofthesefactorsontheprocessoperationwasstudiedthroughtest.Theoreticalstudiesshowedthatundertheconditionwithoutaddingexternalcarbonsource,thenitrogenremovalefficiencyincreasedwithincreasingfeedfrequency.Thefeedmodeswouldbedividedasincreasingfeed,equalfeedanddecreasingfeedbasedontheinfluentC/Nratio.Theexperimentsshowedthatdecreasingfeedmodecouldachieveadvancednitrogenremovalwhenorganiccarbonintheinfluentwassufficientwithlessexternalcarbonsourcerequiredthanthatofequalfeedmodel.Withincreasingfeedfrequency,theexternalcarbonsourcedosagedecreased;buttheoperationbecamecomplex,3stepofequalfeedmodewasrecommendedforcommonmunicipalwastewater.AdoptingthepulsedSBRonlyrequiringsmallamountofexternalcarbonsource,theeffluentTNofmunicipalwastewate