A_O工艺与分段进水两种生物脱氮工艺的比较研究_英文_祝贵兵

JournalofSoutheastUniversity(EnglishEdition)Vol.24,No.4,pp.528-531Dec.2008ISSN1003—7985Comparativestudyoftwobiologicalnitrogenremovalprocesses:A/Oprocessandstep-feedingprocessZhuGuibing1,2PengYongzhen1,3WangShuying3MaBin1(1SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China)(2StateKeyLaboratoryofEnvironmentalAquaticChemistry,ResearchCenterforEco-EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085,China)(3KeyLaboratoryofBeijingWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China)Abstract:Twobiologicalnitrogenremovalprocessesarecomparedintheaspectofnitrogenremoval,processoperationandenergysaving.Resultsshowthatwhenthereturnedsludgeratiois50%oftheinflowrate,thestep-feedingprocessachievesover80%totalnitrogen(TN)removalefficiency,buttheTNremovalefficiencyoftheA/Oprocessisonly40%.Moreover,filamentoussludgebulkingcanbewellrestrainedinthestep-feedingprocess.Giventheconditionsofareturnedsludgeratioof100%andanitrifyingliquorrecycleratioof200%,theTNremovalefficiencyis78.32%intheA/Oprocess,butthesludgevolumeindex(SVI)valueincreasesto143mL/g.Inthestep-feedingprocess,theSVIisonly94.4mL/gwhentheTNremovalefficiencyreaches81.1%.Thestep-feedingprocesshasdistinctadvantagesovertheA/Oprocessintheaspectsofpracticability,nitrogenremovalandoperatingstability.Keywords:activatedsludge;biologicalnitrogenremoval;A/Oprocess;step-feedingprocess;efficiencyReceived2008-02-26.Biographies:ZhuGuibing(1979—),male,doctor;PengYongzhen(corre-spondingauthor),male,doctor,professor,pyz@bjut.edu.cn.Foundationitems:TheProjectofScientificResearchBaseandScientificInnovationPlatformofBeijingMunicipalEducationCommission(No.PXM2008-014204-050843),theProjectofBeijingScienceandTechnolo-gyCommittee(No.D07050601500000),theKnowledgeInnovationPro-gramoftheChineseAcademyofSciences(No.RCEES-QN-200706),theSpecialFundsforYoungScholarsofRCEES,CAS.Citation:ZhuGuibing,PengYongzhen,WangShuying,etal.Comparativestudyoftwobiolog