DO和填料对多级AO工艺同步硝化反硝化的影响张智

DOA/O121212341．4000452．4000453．7100724．401120A/OA/O。DODO0．5mg/L37．4%。。DO。A/ODO0．5、1．0、1．5mg/L。DOA/OX703A1000－4602201317－0011－05EffectofDOandFillersonSimultaneousNitrificationandDenitrificationinMultistageA/OProcessZHANGZhi12LIUYa-qin12FUBin12ZHANGYe-chuan3CHENJie-yun41．SchoolofUrbanConstructionandEnvironmentalEngineeringChongqingUniversityChongqing400045China2．KeyLaboratoryofThreeGorgesＲeservoirＲegion’sEco-Environment＜MinistryofEducation＞Chongqing400045China3．SchoolofPowerandEnergyNorthwesternPolytechnicUniversityXi’an710072China4．JianlongEnvironmentalProtectionEngineeringCo．Ltd．Chongqing401120ChinaAbstractToimprovetheefficiencyofnitrogenremovalfromthelowcarbonsewageandexcavatethepotentialofmultistageA/Oprocessforenhancingnitrogenremovalasmall-scaleexperimentalstudyonsimultaneousnitrificationanddenitrificationinmultistageA/Oprocesswascarriedout．Theresultsshowedthatthesimultaneousnitrificationanddenitrificationratesexhibitedadownwardtrendalongwiththeriseindissolvedoxygenconcentration．Theratewas37．4%atalowdissolvedoxygenof0．5mg/L．Therateofsimultaneousnitrificationanddenitrificationwasimprovedafteraddingfillersintothesystem．Howeverwiththeriseindissolvedoxygenconcentrationtheeffectoffillersonsimultaneousnitrificationanddenitrificationwasgraduallyweakened．BasedonteststhelowoxygencascadeaerationoperationcontrolmodeinthemultistageA/Oprocesswasproposedandtheoptimaloperationconditionswerede-termined．Theoptimaldissolvedoxygenconcentrationswere0．5mg/L1．0mg/Land1．5mg/Lrespec-tively．Ammonianitrogenremovalandagreaterdegreeofsimultaneousnitrificationanddenitrificationwereachievedwithlowenergyconsumptionintheaerationzones．Keywordssimultaneousnitrificationanddenitrificationdissolvedoxygenfillersmulti-·11·291720139CHINAWATEＲ＆WASTEWATEＲVol．29No．17Sep．2013stageA/OprocessSND、、1～3。、、SND。A/OA/O“—”4。5～7A/O。A/OSND。11.11。BOD5/TN＞4．0BOD5/TN1．0～3．0。1Tab．1Ｒawwastewaterqualitymg·L－1CODTNNH+4－NNO－3－NTP113～31625～4823～420～0．141．8～4．621836320．022．71.21、A/O、。1Fig．1SchematicdiagramofmultistageA/Oprocess1000mm×750mm×750mm410L。。A/O1m3/dHＲT8h0．7m720mm×660mm×1000mm330L。。。。、。。3L640%。3300mg/L2000mg/L。190min、120、95min。DO0．5±0．15、1．0±0．15、1．5±0．15mg/L。。1.3COD、NH+4－N、NO－3－NpH。y1。y=1－ΔNO－3－NΔNH+4－N×100%1ΔNO－3－N———ΔNH+4－N———22.1DOSNDDO。、。3．5mg/L89。·21·2917．watergasheat．com。SNDDODODOSND。DO=0．5mg/LDO=1．0mg/LDO=1．5mg/L。DO0．5mg/L34．6%DO1．5mg/L10．6%2。DODO。。DODO=0．5mg/L。。DODO=1．5mg/L。2DOSNDFig．2SNDrateineachaerobiczoneunderdifferentDOconcentrationsDO10SND。SNDDO/SNDDO/。2.2SND/。、、11。N2SND。SND3。3SNDFig．3EffectofdosingfillersonSNDrateindifferentaerobiczones3DO·31·．watergasheat．comDOA/O2917。DO0．5mg/L7．8%3．8%3．5%。12。、、、。DO。DO0．5mg/L7．8%DO1．0mg/L7%DO1．5mg/L2．5%。DO13。2.3SND。。SNDSND14。。、、5∶3∶2。2.4SNDSNDDO0．5mg/L15DO＜0．5mg/L。SNDSND16。DO0．5/0．5/1．5、0．5/1．0/1．5、0．5/1．5/1．5mg/L。15dCOD、NH+4－NTN2。2Tab．2CODTNandNH+4－NremovalunderdifferentoperationmodesCODTNNH+4－N/mg·L－1/mg·L－1/%/mg·L－1/mg·L－1/%/mg·L－1/mg·L－1/%12142986．545．06．785．142．64．090．622102389．146．46．985．144．61．596．632193086．348．48．382．942．21．097．62COD210mg/LCOD30mg/LADOCOD。1DONH+4－N。3。SND2。3①DOSNDDO=0．5mg/LSND。SNDDO0．5、1．0、1．5mg/L。②DO。DO。③2COD、NH+4－NTNSND。1YangXHeJJiangT．EffectsofaerationvolumeandalkalinityonsimultaneousnitrificationanddenitrificationSNDofaerobicgranularsludgesequencingbatchre-actorJ．JBiotechnol20081361664－665．·41·2917．watergasheat．com2ThirdKAGibbsBNewlandMetal．Long-termaera-tionmanagementforimprovedN-removalviaSNDinasequencingbatchreactorJ．WaterＲes200539153523－3530．3WeissenbacherNLodererCLenzKetal．NOxmonito-ringofasimultaneousnitrifying-denitrifyingSNDacti-vatedsludgeplantatdifferentoxidationreductionpoten-tialsJ．WaterＲes2007412397－405．4LarreaLLarreaAAyesaE．developmentandverifica-tionofdesignandoperationcriteriaforthestepfeedprocesswithnitrogenremovalJ．WaterSciTechnol2001431261－268．5ZhuGBPengYZWuSYetal．Simultaneousnitrifi-cationanddenitrificationinstepfeedingbiologicalnitro-genremovalprocessJ．JEnvironSci20071991043－1048．6GeSJPengYZWangSYetal．Enhancednutrientremovalinamodifiedstepfeedprocesstreatingmunici-palwastewaterwithdifferentinflowdistributionratiosandnutrientratiosJ．BioresourTechnol2010101239012－9019．7PuznavaNPayraudeauMThornbergD．Simultaneousnitrificationanddenitrificationinbiofilterswithreal-timeaerationcontrolJ．WaterSciTechnol2000431269－276．8．DOA/OJ．201127580－82．9FengLJXuJXuXYetal．Enhancedbiologicalni-trogenremovalviadissolvedoxygenpartitioningandstepfeedinginasimulatedriverbioreactorforcontaminatedsourcewaterremediationJ．IntBiodeteriorBiodegrad20127172－79．10．J．200330488－91．11．J．20123811－5．12．SNDJ．201036657－60．13MengQYangFLiuLetal．EffectsofCOD/NratioandDOconcentrationonsimultaneousnitrificationanddenitrificationinanairliftinternalcirculationmembranebioreactorJ．JEnvironSci2008208933－939．14HolmanJBWarehamDG．CODammoniaanddis-solvedoxygentimeprofilesinthesimultaneousnitrifica-tion/denitrificationprocessJ．BiochemEngJ2005222125－133．15．A2/OM．2009．16．J．2005256646－649．1960－、。[e-mail]2013－06－18·51·．watergasheat．comDOA/O2917