不同操作模式对移动床生物膜反应器脱氮除磷效果的影响_郭海燕

第62卷第4期化工学报Vol.62No.42011年4月CIESCJournalApril2011研究论文不同操作模式对移动床生物膜反应器脱氮除磷效果的影响郭海燕1,2,周集体2,郭帧1,张寿通1,冯腾腾1(1大连交通大学环境与化学工程学院,辽宁大连116028;2大连理工大学环境与生命学院,辽宁大连116024)摘要:考察了连续进出水方式(CMBBR)、单级好氧序批式[SBMBBR(O)]和厌氧/好氧序批式[SBMBBR(A/O)]3种操作模式下移动床生物膜反应器(MBBR)对模拟污水的处理效果。实验结果表明,3种操作模式下COD去除差异不大,TN、TP去除效果不同。SBMBBR(O)操作模式下由于存在单个周期DO周期性的变化,较CMBBR操作模式更有利于同时硝化反硝化(SND)的发生,脱氮率达到74%。SBMBBR(A/O)操作模式下,进水中的有机物能够在厌氧阶段优先被聚磷菌和反硝化菌消耗,脱氮效果优于SBMBBR(O)操作模式,且能够实现磷的同步脱除,脱氮率和除磷率分别达到了88%和89%,其中,TN是基于进水和搅拌阶段的缺氧反硝化、好氧阶段的SND以及反硝化除磷途径去除,而TP是基于常规除磷过程以及反硝化除磷实现的。关键词:污水处理;移动床生物膜反应器;操作模式;脱氮除磷;同时硝化反硝化中图分类号:X703.1文献标志码:A文章编号:0438-1157(2011)04-1110-07EffectofoperationmodeonnitrogenandphosphorusremovalinmovingbedbiofilmreactorGUOHaiyan1,2,ZHOUJiti2,GUOZhen1,ZHANGShoutong1,FENGTengteng1(1CollegeofEnvironmentalandChemicalEngineering,DalianJiaotongUniversity,Dalian116028,Liaoning,China;2CollegeofEnvironmentalandBiologicalScience,DalianUniversityofTechnology,Dalian116024,Liaoning,China)Abstract:Syntheticwastewaterwastreatedinamovingbedbiofilmreactor(MBBR)usingdifferentoperationmodes,namely,continuousoxicoperationmode(CMBBR),singlestageoxicsequencingbatchoperationmode[SBMBBR(O)]andanaerobic/oxicsequencingbatchoperationmode[SBMBBR(A/O)].TheexperimentalresultsindicatedthattheremovalofCODwassimilarforthethreeoperationmodes,whilethatofTNandTPwasquitedifferent.ComparedwithCMBBR,SBMBBR(O)operationmodewasmorefavorablefortheprocessofsimultaneousnitrificationanddenitrification(SND)duetocyclicalchangeofDOconcentrationinsingleperiodofoperationandTNremovalefficiencyof74%wasachieved.ForSBMBBR(A/O)operationmode,organiccarbonininfluentcouldbeeffectivelyutilizedbypoly-phosphate-accumulatingorganismsanddenitrifiers,TNandTPcouldberemovedsimultaneouslyandtheirefficiencieswere88%and89%respectively,whichindicatedthatTNremovalefficiencywasbetterforSBMBBR(A/O)thanSBMBBR(O).RemovalofTNwasaccomplishedbyanoxicdenitrificationduringthefillingandmixingstage,SNDanddenitrifyingphosphorusremovalinaerobicstage,whileremovalof2010-09-25收到初稿,2010-12-08收到修改稿。联系