不同运行模式对同步脱氮除磷CAST工艺快速启动及其稳定维持的影响

88Vol．8No．820148ChineseJournalofEnvironmentalEngineeringAug.2014CAST730070/-A/O2CAST。/30dTN80.66%66.30%18dTN81.36%90%0.3mg/LAGB8978-2002。。CAST-X703A1673-9108201408-3181-08EffectofoperationalstrategyonstartupandmaintenanceofaCASTprocesswithsimultaneousnitrogenandphosphorusremovalperformanceMaJuanSongXiangruiYuXiaojunLiLuHaoHuofanSchoolofEnvironmentalandMunicipalEngineeringLanzhouJiaotongUniversityLanzhou730070ChinaAbstractTheeffectoftwodifferentoperationalstrategiesonthestartupandmaintainingstablenitrogenaswellasphosphorusremovalperformanceofacyclicactivatedsludgetechnologyCASTtreatingrealwastewaterwasinvestigated．Theresultsshowedthata30daysstartupperiodwasrequiredforthesystemtoachieveastablenutrientremovalperformanceunderthetraditionaloperationmodeandtheaveragetotalnitrogenandphosphor-ousremovalefficiencieswere80.66%and66.30%respectively．Howeverashorterstartupperiodwithonly18dayswasneededforthesystemtoreachthesteadystateunderthemodifiedoperationmodenamelyalterna-tinganoxic-oxicoperationwithstep-feeding．Duringthesteadystatethetotalnitrogenremovalefficiencywas81.36%andphosphorusremovalwashigherthan90%accompanyingtheeffluentphosphoruslessthan0.3mg/L．TheeffluentqualitycouldmeettherequirementofNationalIntegratedWastewaterDischargeStandard-ClassAGB8978-2002．Itwasalsofoundthatthedeteriorationofsludgesettlingperformanceduetolowtem-peratureresultedinaserioussludgelossandevenafailureofreactorunderthetraditionaloperationmode．Nev-erthelessphosphorousremovalwasnotaffectedbythelowtemperatureunderthemodifiedoperationmodewhereastotalnitrogenremovaldecreasedgreatlyduetotheincompletenitrificationofammonia．KeywordscyclicactivatedsludgetechnologyCASToperationalstrategyalternatinganoxic-oxicop-erationwithstep-feedingnitrogenandphosphorousremovallowtemperature511680272013－07－182013－09－251978～。[e-mail]tech-nologyCASTSBＲ。CAST、、8、、、1。CAST2-7、。———CAST3-8。CAST、。/-A/O2CAST。2。11.1CAST1。84L54L1/10。、、、、。1CASTFig.1SchematicdiagramofexperimentalsystemofCAST1.2。COD160.7～273.7mg/L49.31～79.17mg/L54.65～95.09mg/LPO3－4-P3.1～9.4mg/LCOD/TN3.37。pH7.34～8.089.8～25.8℃。。2d。1.3Ｒ1Ｒ22Ｒ1/Ｒ2。SＲT15d25%1/3。2CASTFig.2OperationmodeofCASTprocess1.4NH+4-NNO－3-NNO－2-NN-1-COD5B-3TN-PO3+4-P。DO、OＲPpHWTWMulti3420MLSS、MLVSS。22.1232。3/Ｒ130COD28138CAST50mg/L96.45%10mg/L74.96%1.5mg/L60%Ｒ218COD36.42mg/L50mg/L92.59%5mg/L83.46%10.35mg/L0.3mg/L90%A。-A/O、。3Ｒ1COD45.33mg/L10.12mg/L80.66%1.10mg/L66.30%Ｒ2COD40.72mg/LＲ19.95mg/L81.36%0.4mg/La、bcＲ1d、efＲ232Fig.3Ｒemovalperformanceoftwodifferentoperationmodes3813890%。943%Ｒ20.4m3/h0.3m3/h90%25%。、2TNＲ29。Ｒ1F/MChudobaKSμmaxSVI6710。42。42Fig.4Variationofchemicalsinatypicalcycleoftwodifferentmodesduringstableoperationperiod48138CAST4Ｒ172.43%4Ｒ1。11。Ｒ2、A。12。2.225。2a、bcＲ1d、efＲ252Fig.5Ｒemovalperformanceandsludgesettlingpropertiesoftwodifferentmodesatlowtemperature5813815℃＜＜20℃＜15℃。15℃＜＜20℃。Ｒ1COD、、84.95%、87.55%、71.61%66.23%COD43.75mg/LSVI1248.1mL/gＲ2COD、、87.23%、86.05%、74.89%97.28%COD36.90mg/L315.9mL/g。15℃Ｒ1COD、、75.78%、16.43%、16.55%45.47%COD72.54mg/LSVI1173.7mL/g、50dMLSSＲ2COD、、84.62%、37.04%、33.15%97.41%COD45.60mg/LSVI252.6mL/gＲ1。320℃。。COD≤15℃15℃COD15℃1314。815。1617＜10℃。Ｒ2Ｒ2。1718。Ｒ1434mg/L。Ｒ2CODＲ1。-。15℃6。6Fig.6Ammoniadegradationofsludgefromtworeactorsatdifferenttemperatures6。13、18、2328℃468138CASTＲ10.71、0.87、1.031.83kgN/kgMLSS·hＲ21.91、2.98、4.414.62kgN/kgMLSS·hＲ1Ｒ2。Ｒ2。23℃2h80%。23℃Ｒ1Ｒ2Ｒ1。31-A/O/。30d18dA。25%。215℃88%。15℃。3-A/O。1．．20102．SBＲ．20033PulgS．VivesM．T．CorominasL．etal．WastewaternitrogenremovalinSBＲsapplyingastep-feedstrategyFromlab-scaletopilot-plantoperation．WaterScienceandTechnology2004501089-964GuoJ．H．YangQ．PengY．Z．etal．Biologicalnitro-genremovalwithreal-timecontrolusingstep-feedSBＲtechnology．EnzymeandMicrobialTechnology20074061564-15695GuoJ．H．PengY．Z．YangQ．etal．Theoreticalanal-ysisandenhancednitrogenremovalperformanceofstep-feedSBＲ．WaterScienceandTechnology2008584795-8026MaJ．PengC．Y．WangL．etal．Biologicalnitrogenremovalinastep-feedCASTwithreal-timecontroltreatingmunicipalwastewater．WaterScienceandTechnology20106192325-23327．CAST．2010412793-798MaJ．PengY．Z．WangS．Y．etal．Performanceofadvancednitrogenremovalwithon-linecontrolusingstep-feedCASTtechnology．JournalofCentralSouthUniversityScienceandTechnology2010412793-798inChinese8．/CASTρCOD/ρTN．2012383443-449PengY．Z．WangL．MaJ．etal．Biologicalnitrogenremovalbyalternatinganoxic/aerobicCASTtreatingmunic-ipalwastewaterwithalowρCOD/ρTNratio．JournalofBei-jingUniversityofTechnology2012383443-449inChinese9BerilS．A．AysenurU．Theeffectofananoxiczoneonbiologicalphosphorusremovalbyasequentialbatchreac-tor．BioresourceTechnology20049411-710MaritsA．M．P．PagllaK．HeijnenJ．J．etal．Fila-mentousbulkingsludgeAcriticalreview．WaterＲe-search2004384793-81711．．2010374586-593YangY．Y．ZengW．LiuJ．Ｒ．etal．Effectofnitriteonbiologicalphosphorusremovalinwastewater．Microbi-ologyChina2010374586-593inChinese12WangY．Y．PengY．Z．StephensonT．Effectofinflu-entnutrientratiosandhydraulicretentiontimeHＲTonsimultaneousphosphorusandnitrogenremovalinatwo-sludgesequencingbatchreactorprocess．Bioresource78138Technology20091001