A2N2系统反硝化除磷性能的优化及稳定运行王梅香

2016,36(11)3311~3320ChinaEnvironmentalScienceA2N2,,*,,,(,,,,100124)“///”(A2N2),C/N,A2/OSBRNSBR,.;(DPAOs),A2N2;A2/OSBR1.5h,COD;NSBR5h,NH4+N;A2/OSBR1.5h,2h,0.5h,NSBR5h,1h,CODNH4+NTNPO43P46.20.8213.630.3mg/L,.A2N2(SBR)C/NX703.1A10006923(2016)11331110DenitrifyingphosphorusremovalperformanceoptimizationandstableoperationofA2N2system.WANGMei-xiang,ZHAOWei-hua,WANGShu-ying*,HUANGYu,PANCong,PENGYong-zhen(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,EngineeringResearchCenterofBeijing,NationalEngineeringLaboratoryforAdvancedMunicipalWastewaterTreatmentandReuseTechnology,BeijingUniversityofTechnology,Beijing100124,China).ChinaEnvironmentalScience,2016,36(11)3311~3320AbstractThetwo-sludgedenitrifyingphosphorusremovalsystem(A2N2)withanaerobic/nitrification/anoxic/nitrificationoperationmodewasusedtotreatlowC/Nratiorealdomesticwastewaterinsequencingbatchreactors(SBR).ThroughtheoperatingconditionoptimizationofA2/O-SBRandN-SBRunit,thesystemachievedefficientdenitrifyingphosphorusremovalperformancewiththelowcarbonsourcesewageandsolvedtheproblemofhighNH4+-NinA2N-SBRprocess.Experimentalresultsshowedthatpost-aerationwasessentialtotheefficientnutrientremovalperformanceandlong-termstableoperationoftheA2N2-SBR.CompletedenitrifyingphosphorusuptakewithoutaerobicphosphorusuptakeattheanoxicstageoftheA2N2-SBRwasdisadvantageoustothegrowthandreproductionofdenitrifyingphosphorusaccumulatingorganisms(DPAOs).Anaerobicdurationof1.5hintheA2/O-SBRwasensuredthecompleteoxidationofbiodegradableCOD,andnitrificationdurationof5hintheN-SBRprovidedsufficienttimeforNH4+-Noxidation.Withanaerobicphosphorusreleaseof1.5h,denitrifyingphosphorusuptakeof2h,andaerobicphosphorusuptakeof0.5hintheA2/O-SBRunit,andthefirstnitrificationof5handsecondnitrificationof1hintheN-SBRunit,theaverageeffluentCOD,NH4+-N,TNandPO43-PconcentrationsintheA2N2-SBRsystemwas46.2,0.82,13.63and0.82mg/L,respectively.SimultaneousnitrogenandphosphorusremovalwasachievedinthenovelA2N2-SBRsystem.KeywordsA2N2two-sludgesystemsequencingbatchreactor(SBR)lowC/Nvaluedomesticwastewaterdenitrifyingphosphorusremovalperformanceoptimizationandstableoperation,,[1].C/N,20160317(51578014);*,,[e-mail]331236.,,[24].,,/,,.KubaT[56],A2NSBR,;,50%30%,50%,C/N.[79][1012].A2NSBR“”[13],,,[5].A2NSBR,[5],A2SBRDPAOs[14],,,,A(5mg/L).C/N,A2N2A2/OSBRNSBR,.A2N2,,,,,.11.11,A2N2//SBR(A2/OSBR)SBR(NSBR),(SBR),20cm,45cm,12L,10L,,.A2/OSBR,,90r/min,,,(MLSS)2500~3000mg/L,SRT15d;NSBR,(50%),,,,,DO4~6mg/L,DOTpH.,.,.39107648521(a)1A2N2Fig.1SchematicoftheA2N2Denitrifyingphosphorusremovalexperimentaldevice1.;2.A2/OSBR;3.;4.;5.A2/OSBR;6.;7.NSBR;8.NSBR;9.;10.,——A2N2,“///”,11A2N23313;A2/OSBR,PHA,,NSBR,A2/OSBR,,,,,NSBR,,,A2NSBR,,2.(b)2A2N2Fig.2SchematicoftheA2N2Denitrifyingphosphorusremovalprocessflow1.2.,,,1.1,C/N.1Table1CharacteristicsofinfluentwastewaterCOD(mg/L)NH4+N(mg/L)NO2N(mg/L)NO3N(mg/L)TN(mg/L)PO43P(mg/L)C/N151.8~32838.77~81.540~1.10~1.4839.18~81.942.95~8.682.39~6.33244.2360.570.160.3161.045.984.111.32A2N2Table2OperationalconditionsforA2N2systemA2/OSBRNSBRI(0~22d)2.0h1.0h3.5hII(23~53d)1.0h2.5h2.0hIII(54~67d)1.0h2.0h0.5h2.0hIV(68~92d)1.0h2.0h0.5h5.0hV(93~106d)1.5h2.0h0.5h5.0hVI(107~123d)1.5h2.0h0.5h5.0h1.0h[1516],A2/OSBRNSBR,,A2/OSBRNSBR,,;,,A2/OSBRNSBR,,;,,,.331436,A2/OSBR,(MLSS)2500~3000mg/L,SRT15d,100L/h,NSBR120L/h,0.7,.2A2N2.1.4NH4+NNO2NNO3NPO43PTNTPCODMLSSSVI;TNTN/TOC(MultiN/C3100,AnalytikJena,AG);pHDOTWTWMulti340i().22.1A2/OSBR2.1.13(a)A2N2PO43P.3(a),I,A2/OSBR2h/1h,A2N2,PO43P48mg/L,PO43P0.3mg/L,PO43P95.5%.,O2(PAO)A2N2.,,VFAs(PHA),,.II~VI,A2/OSBR/(A/A)//(A/A/O),NO3N,,O2A2/OSBR,.I,A2N2II~VI,II7.11mg/L,,.IIA2/OSBRDPAOs,DPAOs.[17],/,,DO(DO0.3mg/L),DPAOs,.DPAOs,/.-1001020304050607080901001101201300102030405060PO43--P(mg/L)IIIIIIIVVVI(d)(a)A2O/SBRPO43--P-20020406080100120140160180200220240260255075100125150175200225250275CODCOD(mg/L)(min)-100102030405060PO43--PPO43--P(mg/L)(b)O2A2O-SBRCODPO43--P-30030609012015018021024027030033036039042020406080100120140160180200220CODCOD(mg/L)(min)+02468101214161820PO43--PPO43--P(mg/L)(c)NO3--NA2O/SBRCODPO43--P3A2/OSBRCODPO43PFig.3CharacteristicsofCODandPO43PremovalinA2/OSBRunit3(b)(c)O2NO3N11A2N23315A2/OSBRCODPO43P.3(b)3(c),COD,.CODPHB,.NO3N,.3(b),CODCOD86.5%13.5%,96%COD10min.10min,A2/OSBRPO43P39.43mg/L,,COD77.3mg/L.10min,COD,A2/OSBR,PO43P47.77mg/L,,94.5%.[1820],,COD,.3(c),30min,84.5%,NO3N,,PO43P2.01mg/L.2.1.24,A2N2.4,PO43P,6mg/L.II,A2/OSBR/,,PO43P,PO43P,,PO43P,PO43P5.09mg/L.,II(DPAOs),A2N2,.III,A2/OSBR1h/2.5h1h/2h/0.5h.28.97mg/L,PO43P0.8mg/L,0.34mg/L,,87.9%.,PO43P,,.,,;,NSBR,NO3N,.,A2N2.[21],,COD.[22]AAOBAF,.,DPAOs.2030405060708090100110120130-50510152025303540455055PO43--P(mg/L)(d)IIIIIIVVVI0153045607590105120(%)4A2N2Fig.4PerformanceofdenitrifyingphosphorusremovalintheA2N2systemPP3316362.1.3A2N2,.,.,,(),;,(DPB)COD,,.,,.3(a)46,2h(I),41.05mg/L,0.3mg/L,95.5%;1h(II~IV),IIA2/OSBR/DPBs,DPBs,,1.51mg/L14.1%,,;III~IVA2/OSBR,,,IV,22.41mg/L,I,2h1h,DPBs,CODPHB,COD(6),/,,,IV5hNO3N,80%.1.5h(V~VI),92~109d,109d27.39mg/L,1h1.5h,PHB,,COD110.63mg/L72.61mg/L(6),;,IV~VI,,