序批式移动床生物膜反应器脱氮除磷影响因素及特性
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2020-02-24 09:49:56
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第63卷第1期2012年1月化工CIESC学报Journa1Vo1.63No.1January2012序批式移动床生物膜反应器脱氮除磷影响因素及特性郭海燕,郭祯,冯腾腾,张寿通,周集体(大连交通大学环境与化学工程学院,辽宁大连116028;。大连理工大学环境与生命学院,辽宁大连116024)摘要:考察了曝气量、进水C/N比(COD/TN)及进水氮、磷浓度对序批式移动床生物膜反应器(SBMBBR)脱氮除磷效果的影响,分析了该复合生物系统的污染物去除特性。实验结果表明,反应器脱氮主要是基于好氧段发生的同时硝化反硝化(SND)作用实现的,而除磷是基于常规生物除磷和反硝化除磷过程而完成;在保持载体良好流化状态的前提下,反应器硝化效果和TP去除受曝气量变化影响不大,反硝化效果随曝气量的减小而改善;采用厌氧/好氧序批式运行方式,能够使进水中的有机物被反硝化聚磷菌优先利用,实现一碳两用,节省了脱氮对外部碳源的需要,在进水C/N为2.8~4.0时能获得良好的硝化、反硝化和TP去除效果;随着进水氮、磷浓度的提高,反应器除磷效果相对稳定,脱氮效果变差,最大氮、磷去除负荷分别达到0.17kgTN·m·d一和0.06kgTP·m一。·d一。关键词:SBMBBR;脱氮除磷;SND;反硝化除磷DOI:10.3969//j.issn.0438—1157.2012.01.035中图分类号:X703.1文献标志码:A文章编号:0438—1157(2012)01—0251—07Characteristicsandfactorsinfluencingdenitrificationanddeph0sph0rizati0ninsequencingbatchmovingbedbiofilmreactorGUOHaiyan,GUOZhen,FENGTengteng,ZHANGShoutong,(CollegeofEnvironmentalandChemicalEngineering,DalianJiaotongUniversity,DalianCollegeofEnvironmentalandBiologicalScience,DalianUniversityofTechnology,DalianZHoUJiti。116028,Liaoning,China;116024,Liaoning,China)Abstract:Inthispaper,theeffectofaerationrate,C/Nratioandtheconcentrationofnitrogenandphosphorusatinflowpointontheperformanceofasequencingbatchmovingbedbiofilmreactor(SBMBBR)wasstudied,andthemechanismofpollutantsremovalforhybridmicroorganismsystemwasalsodiscussed.Theexperimentalresultsdemonstratedthatnitrogenremovaltookmainlyplaceinaerobicphasebysimultaneousnitrificationanddenitrification(SND),whilephosphorusremovalcarriedoutbyconventionalbio—dephosphorizationanddenitrifyingphosphorusremova1.ThefluidizedstateofbedandDOconcentrationinthemixed1iquidwereaffectedbyaerationrate.Ifgoodfluidizedstatecouldbekept(4.8——9.0L·L·h一ofaerationrate),denitrificationcouldbeimprovedwithaerationratedecreased,whilefornitrificationandTPremovaltherewasnoobviouseffect.Ifanaerobic/oxicsequencingbatchoperationmodewasadopted,organicsininfluentwatercouldbepreferentiallyutilizedbydenitrifyingphosphorusaccumulatingorganisms,andtheneedofextracarbonfordenitrificationcouldbedecreased.At2.8一一4.0ofc/Nratioininfluentwateragood
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