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2016,36(1)92~99ChinaEnvironmentalScienceSNDPR,*,,(,,100124)(3h)/(2.5h,0.5~1.0mg/L)(SNDPR),,(3.5,3,2,1.5h).:3.5h,.3h,,PO430.35mg/L.1.5h3.5h,PHAs;3h3.5h,P,P.,.511.5h2h;pH.—PHAsX703A10006923(2016)01009208Effectofdifferentanaerobictimeonthenutrientremovalinsimultaneousnitrification-denitrificationandphosphorusremoval(SNDPR)systemsenrichedwithphosphorusaccumulatingorganisms.DAIXian,PENGYong-zhen*,WANGXiao-xia,WANGShu-ying(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China).ChinaEnvironmentalScience,2016,36(1)92~99AbstractThisstudyaimedtoinvestigatetheeffectofdifferentanaerobictime(3.5,3,2,1.5h)onthenutrientremovalandtheintracellularcarbonstorageofsimultaneousnitrificationdenitrificationandphosphorusremoval(SNDPR)systemstreatingurbansewage.TheSNDPRsystemwasenrichedwithphosphorusaccumulatingorganisms(PAOs)andoperatedunderextendedanaerobic(3h)andshortlowaerobic(2.5h,withdissolvedoxygenconcentrationfor0.5~1.0mg/L).Experimentresultsshowedthatthesystemnitrogenandphosphorusremovalperforamceimprovedwiththeextendinganaerobictime.Whentheanaerobictimewas3h,thephosphorusreleasewasbestwiththeeffluentconcentration(0.35mg/L).Whenanaerobictimegraduallyincreasedfrom1.5hto3.5h,poly-hydroxyalkanoates(PHAs)syntheticamountincreased,butphosphorusreleaseamountdecreased.Theresultsindicatedthatextendedanaerobictime(3h)wasbenificalforenhacingtheintracellularcarbonstorage,butoverlonganaerobictime(above3.5h)wasinimicaltothedominantPAOs.Additionally,nonfilamentousbulkingappearedattheanaerobictimeof1.5hand2hafter51cyclesoperation,andpHcouldbeusedastheindicatingparameterforphosphorusrealse,phosphorusuptakeandsimultaneousnitrification-denitrificationintheSNDPRsystem.Keywordssimultaneousnitrificationdenitrificationandphosphorusremoval(SNDPR)poly-hydroxyalkanoates(PHAs)phosphorousaccumulatingorganisms(PAOs)anaerobictimenon-filamentousbulking(EBPR),.EBPR(PAOs),PAOs[1].(SND),.(SNDPR),(EBPR)(SND)20150527(2015ZX07218001);*,,pyz@bjut.edu.cn1SNDPR93.SNDPR/,,PO43—PHAs.,.””,,,,,,,,[2].SNDPR[3].PHAs,PHAs,PHAsSNDPR,SNDPR.SNDPR/,PHAs,,PHAs.,SNDPR.4(SBR),PHAsSNDPR,SNDPR.11.1120dSNDPRSBR.SBR8L,0.6,4,6h:15min,3h,2.5h,25min,3min,2min.15d,0.5~1mg/L.120d,NP,MLSS3000mg/L,(FISH).,SBRPAOs34%±3%,,PAOs45.9%.1.2(210,180,120,90min)SNDPRPHB4SBR(1#,2#,3#,4#,3L).,2L,6L,4SBR.4SBR:3.5h,2.5h(1#SBR),3h,2.5h(2#SBR),2.5h,2.5h(3#SBR),1.5h,2.5h(4#SBR),,.4,6h.,250r/min.DOpH7.5DO/pHSBR1L1SBRFig.1Sequencingbatchreactor(SBR)experimentaldevicefordifferentanaerobictime1.3,:COD150~230mg/L,NH4+N58~75mg/L,NO2N1mg/L,9436NO3N0.1~1.4mg/L,PO435.6~8.6mg/L,pH7.3~7.6.1.40.45μm:NH4+N,NO2N,NO3NTPLACHAT8500;COD5B3(B)COD;MLSSMLVSS;pHDOWTWpH/Oxi340i;PHAVFAAgilent6890N,PHAPHBPHV,2.OLYMPUSBX51BX52SV100mL30min.SVISVMLSS[3].(SVI).SVI150mL/g,[4].22.1SNDPR020406080100120140160180210230250270290310330360(min)0102030405060NH4+-NNO2--NNO3--N2.5hPO43-(mg/L)NH4+-N\NO3--N\NO2--N(mg/L)(a)1#SBR3.5h05101520253035PO43-0204060801001201401601802002202402602803003300102030405060(min)NH4+-NNO2--NNO3--N2.5h(b)2#SBR3h05101520253035PO43-(mg/L)NH4+-N\NO3--N\NO2--N(mg/L)NO43-0204060801001201401601802002202402700102030405060(min)NH4+-NNO2--NNO3--N2.5h(c)3#SBR2h05101520253035PO43-PO43-(mg/L)NH4+-N\NO3--N\NO2--N(mg/L)0204060901101301501701902102400102030405060(min)NH4+-NNO2--NNO3--N2.5h(d)4#SBR1.5h05101520253035PO43-PO43-(mg/L)NH4+-N\NO3--N\NO2--N(mg/L)2SBRNH4+NNO3NNO2NPO43Fig.2VariationsofNH4+NNO2NNO3NPO43concentrationsunderdifferentanaerobictimeduringatypicalcycle2,,TN.NH4+NNO2N,NO3N20,1.5h2h,NO3N6~8mg/L.NO3N,.PO43,,PO43;1.5h1SNDPR953h,P,3hPO43,26.1mg/L.P,1.5233.5h,1.5h90%,,PO43.,[5].2,,PO43,1.5h.3h3.5h,NO2NNO3N1hNO3N,NO2NNO3N.NO2N,NH4+N,NO3N.1.5h2h,1h,NO2N,,NO3N,NO2N.3h3.5h,1.5h2h.2PO431.5h,,SNDPR,,PHB,,NO2N,NO3N,NH4+N,[6].PO43,3h3.5h,,PO4322.5mg/L.3.5h,3h.2,,.NO2N,[78].2.2PHB1PHACODTable1TheutilizationcharacteristicscaseofGlycogenPHAandCODduringatypicalcycle/(mg/g)PHA(mMC/L)PHB(mMC/L)PHV(mMC/L)CODmg/L)1#35.764.303.380.9145.030min32.206.344.002.33113.290min27.2516.5813.123.4654.5120min21.2522.9018.194.7146.3180min19.7426.3019.307.0045.219.4428.0420.487.5645.530min25.5016.8711.325.5544.3120min37.584.703.481.2341.641.124.183.081.1042.52#34.393.260.462.80155.530min33.297.984.573.4191.860min30.478.626.222.4090.190min24.3120.6113.597.0155.8120min21.1524.5317.257.2748.021.0927.6219.987.6444.030min30.8226.2318.947.2942.5120min36.489.217.871.3445.838.135.563.921.6345.93#24.314.603.381.2346.230min18.544.252.671.58107.790min18.5612.818.074.7456.916.3619.5314.664.8756.930min21.5512.2810.092.1957.3120min24.908.657.301.3447.129.244.763.471.3043.94#21.862.920.352.5746.230min17.617.233.863.3797.860min17.2611.576.704.8765.115.5712.137.174.9559.230min18.645.372.203.1752.8120min21.622.050.841.2244.725.703.050.192.8644.91,3.5h,16.32mg/g21.68mg/g;1.5h,6.95mg/g10.13mg/g.,,.2.1PO43,3.5h,PP3h,PHA9636.3.5h,.(GAOs)(PAOs),GAOsPHA,GAOs;GAOs1molPHA0.95mol,PAOs1molPHA0.42mol,PHA.3.5h,,,,,.2.1,,,PHA,,3h3.5h[1012].1CODPHA,1.52h,COD,2h3h,COD4~5mg/L.3h3.5hCOD.COD,.PHA1.5h3.5h