A2O2工艺处理氮肥废水的短程硝化反硝化

A2/O2450001A2/O2－－－MLSS3000～3500mg/LSRT15d80%200%150%24～28℃。DO89%。COD/TN1．210mg/L90%COD28．7mg/L86．4%TN59mg/L68%。A2/O2X703A1000－4602201117－0015－04ResearchonShort-cutNitrificationandDenitrificationinA2/O2ProcessforTreatmentofNitrogenousFertilizerWastewaterGAOJian-leiZHANGXiao-jingLIShi-leiLIUHang-hangCollegeofWaterConservancyandEnvironmentalEngineeringZhengzhouUniversityZhengzhou450001ChinaAbstractTheA2/O2anoxic-anaerobic-microaerobic-aerobicprocesswasusedtotreatnitroge-nousfertilizerwastewaterinapilot-plant．DuringtheexperimenttheMLSSis3000to3500mg/LtheSRTis15dthesludgerefluxratiois80%thenitrificationliquidrefluxratiois200%thenitrosationliquidrefluxratiois150%andthewastewatertemperatureisbetween24and28℃．Basedonthecom-pletenitrificationanddenitrificationstableaccumulationofnitritenitrogenisachievedbycontrollingtheDOinthemicroaerobiczoneandtheaccumulationratereachesanaverageof89%．Afterstableopera-tionforsometimetheaverageammonianitrogenCODandTNintheeffluentare10mg/L28．7mg/Land59mg/Lrespectivelyandtheaverageremovalratesare90%86．4%and68%respectivelyundertheconditionthattheCOD/TNoftheinfluentisonly1．2．KeywordsA2/O2processshort-cutnitrificationANAMMOXnitrogenousfertilizerwastewater082102350004C/N。C/N1～3－－－A2/O2DOA2/O2、TN、COD·51·271720119CHINAWATER＆WASTEWATERVol．27No．17Sep．2011。11.124×104t/a40×104t/a10×104t/aDMF15×104t/a。1。1Tab．1InfluentwaterqualityduringexperimentpHCOD/mg·L－1/℃/mg·L－1TN/mg·L－17．8～9．5100～45024～2855～195115～3808．6229261102101.2A2/O2。35L/h。1.3A2/O2A2/O21。1A2/O2Fig．1FlowchartofA2/O2process、、。。1344L、、、160、192、720272LHRT5、6、22．5、9h。70L。。TN。。DO0．5mg/L45。。1.435L/hDO1．0mg/LDO3．0mg/L30d40L/hDO0．5mg/L。15d3000～3500mg/L200%150%80%。1.5、NO－2－N、NO－3－N、TN、COD6DOHI9146－04pHORPHI8424/MLSSSVI。22.12.1.12。。DO5。30d78%。DODO。70d·61·2717．watergasheat．com90%。2Fig．2Variationofaccumulationofnitritenitrogenduringsludgeacclimation2.1.2、50%。20d。31DODO50mg/L。。50d15mg/L55mg/L。2.22.2.13。3Fig．3Ammonianitrogenremovalefficiencyduringstableoperation3。DO。10mg/L《》GB8978—1996。。2.2.2TNTN116～380mg/L206mg/LTN35～96mg/L59mg/L68%《》。COD228mg/LCOD/TN1．2。TN。2.2.3CODCOD120～450mg/L228mg/LCOD28．7mg/L《》GB8978—1996≤80mg/L。COD79%～91%86．4%COD。2.2.457～195mg/L89%95．8%。。。3①A2/O2C/NDO95．8%、COD。②DO0．5mg/L74%。21·71·．watergasheat．comA2/O227172.4.2。0．1mg/L。0．08mg/L。3①/2．0mg/L。②/、EBCT。2．0mg/L、EBCT15min、5∶3∶275%。③/。＜16℃＜60%16～24℃70%～80%。④/CODMnUV25429%～54%50%～64%。5%～10%。⑤/。1．J．200834927－30．2．J．20053117－8．3．M．1998．4．－－D．2006．1972－。[e-mail]櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵櫵2011－04－0717③TN。1CarridoJMvanBenthumWAJvanLoosdrechtMCMetal．Influenceofdissolvedoxygenconcentrationonni-triteaccumulationinabiofilmairliftsuspensionreactorJ．BiotechnolBioeng1997532168－178．2MulderAVandeGraafAARobertsonLAetal．Anae-robicammoniumoxidationdiscoveredinadenitrifyingflu-idizedbedreactorJ．FEMSMicrobiolEcol1995163177－184．3KuaiLPVersraeteW．Ammoniumremovalbytheoxy-gen-limitedautotrophicnitrification-denitrificationsystemJ．ApplEnvironTechnol199939713－21．4BernetNPengDCDelgenesJPetal．NitrificationatlowoxygenconcentrationinbiofilmreatorJ．JEnvironEng20011273266－271．5HanakiKWaantawinCOhgakiS．Nitrificationatlowlevelsofdissolvedoxygenwithandwithoutorganicload-inginasuspended-growthreactorJ．WaterRes1990243297－302．6．4M．2006．1963－。[e-mail]2011－02－15·12·．watergasheat．com/2717