分段进水对改良A2OBAF双污泥系统反硝化除磷脱氮的影响南彦斌

39420184ENVIＲONMENTALSCIENCEVol．39No．4Apr．2018A2/O-BAF1211111*1．7300702．100124A2/O-BAFC/NCOD．7∶3COD、NH+4-N、TN、TP174.99、58.19、59.10、5.15mg·L－1COD、NH+4-N、TN、TP29.48、4.07、14.10、0.44mg·L－182.12%、92.76%、75.45%、91.20%DPAOs/PAOs98.81%85.77%92.33%．A2/O-BAFC/N．C/NX703.1A0250-3301201804-1704-09DOI10．13227/j．hjkx．2017092612017-09-282017-10-185166803310100420170631991～[e-mail]*[e-mail]itrifyingPhosphorusandNitrateＲemovalinaModificationoftheTwoSludgeA2/O-BAFSystemNANYan-bin1PENGYong-zhen2ZENGLi-yun1ZHAOZhi-chao1LIUHong1LIHui1CHENYong-zhi1*1．SchoolofEnvironmentalandMunicipalEngineeringLanzhouJiaotongUniversityLanzhou730070China2．NationalEngineeringLaboratoryofUrbanSewageAdvancedTreatmentandＲesourceUtilizationTechnologyBeijingUniversityofTechnologyBeijing100124ChinaAbstractAmodificationofthetwosludgeA2/O-BAFsystemwasusedtotreatlowC/Nrealdomesticsewage．Inordertoimprovetheutilizationofthecarbonsourcetheeffectsoftwostepfeedspre-anoxiczoneandanoxiczoneondenitrifyingphosphorusandnitrateremovalwerestudied．AccordingtotheformulaofmaterialbalanceforCODtheutilizationofcarbonsourcewasanalyzedandevaluatedunderdifferentratiosofstepfeedsimultaneously．Theresultsshowedthatwhentheratioofstepfeedwas7∶3andtheinfluentconcentrationsofCODNH+4-NTNandTPwere174.9958.1959.10and5.15mg·L－1respectivelytheireffluentconcentrationswere29.484.0714.10and0.40mg·L－1andtheremovalrateswere82.12%92.76%75.45%and91.20%respectively．ItwasfoundthatwhentheratioofthedenitrifyingphosphorusaccumulationorganismstothephosphorusaccumulationorganismsDPAOs/PAOswas98.81%theefficienciesofdenitrifyingphosphorusandnitrateremovalwereoptimum．Byoptimizingstepfeedthecarbonsourcewasutilizedeffectivelyandtheefficienciesofnitrogenandphosphorusremovalwereimprovedsimultaneously．ThetheoreticalbasishasthusbeenprovidedforthemodificationofthetwosludgeA2/O-BAFsystemtotreatlowC/Nwastewater．KeywordsratioofstepfeeddenitrifyingphosphorusandnitrateremovalutilizationofcarbonsourcesmaterialbalancelowC/NC/N1．23、456～8．9A/O．10A2/O．11A2/OC/NTNTP．12UCTC/N34A2/O-BAFTN．A2/O-BAF．A2/O-BAFCODA2/OPAOs13．A2/O-BAFC/NPAOsDPAOsPAOs．11.11A2/O60L10、、、1∶2∶5∶28．28LBAF23.5L．、、、BAF．1A2/O-BAFFig．1SchematicdiagramofthestepfeedenhancedA2/O-BAFprocessA2/OBAFNH+4-NBAFA2/O．24～27℃180L·d－1A2/OHＲT8hSＲT12dDO2～3mg·L－1100%200%MLSS2000～2800mg·L－1BAFDO6～8mg·L－15∶5run1、6∶4run2、7∶3run3、10∶0run4．1.21．1Table1InfluentcharacteristicsCOD/mg·L－199．33～257．36188．75NH+4-N/mg·L－138．53～81．7060．26NO－2-N/mg·L－10．00～0．930．22NO－3-N/mg·L－10．17～1．140．59TN/mg·L－138．95～91．4261．57TP/mg·L－11．76～8．074．90pH7．43～7．657．5414COD、NH+4-N、NO－3-N、PO3－4-P、TNTP．MLSS、MLVSSSV30min．pH、DOMulti-3420．1.3CODCODCOD215507139Minf．COD=MPDN．COD+MANA．COD+MANl-S．COD+Ms-eff．COD+MW．COD+Meff．COD1Ms-eff．COD=Qin1+Qin2+QＲ+Qr·cS．COD－ceff．COD2Meff．COD=Qeff·ceff．COD3MW．COD=QW·XW·f·fCV4Minf．CODCODMeff．CODCODMPDN．CODA2/OCODMANA．CODCODMANl-S．COD、CODMs-eff．CODBAFCODMW．CODCODmg·d－1Qin1、Qin2、QＲQrQWQeffL·d－1cin1、cin2、CODcS．CODCODceff．CODCODXWmg·L－1ffCVCODmg1.48mgCOD16．2A2/O-BAFCODFig．2BalanceanalysisofCODinthemodifiedA2/O-BAFsystem1.4DPAOsPAOs17．2PO3－4-PＲan、PUＲanPUＲo18Ｒan=2mg·L－1g·L－1×h5PUＲan=2mg·L－1g·L－1×h6PUＲo=2mg·L－1g·L－1×h7Ｒan、PUＲanPUＲoＲanmax、PUＲanmaxPUＲomaxPUＲanmax/PUＲomaxDPAOs/PAOs．22.13COD99.33～284.45mg·L－1COD40mg·L－1《》GB18918-2002A80%COD．4COD．CODCODCOD235.29%、59.09%、71.42%、63.82%32.79%、30.56%、21.35%、17.02%．PAOsDPAOs19BAFBAF60714A2/O-BAF3CODFig．3CODremovalrateofthesystemunderdifferentoperationalconditions、20CODBAF．24COD57.38%、75.00%、85.77%、76.60%91.57%、91.81%、92.93%、91.75%3COD．2.2NH+4-N、TN5NH+4-NTN38.53～81.70mg·L－138.95～91.42mg·L－14NH+4-NNH+4-N5mg·L－190.00%NH+4-N5∶54CODFig．4CODconcentrationsindifferentstagesunderdifferentoperationalconditions2CODTable2MaterialbalanceofchemicaloxygendemandCOD/mg·d－1Minf．CODMeff．CODMPDN．CODMANA．CODMANl-S．CODMs-eff．CODMW．CODrun124787.3510565.103657.151219.058127.003250.802379.63run229257.207314.309264.783413.348939.706501.604430.57run322836.873250.807963.216256.814876.203254.402130.44run438196.908939.7013815.9010564.206502.506501.601725.56TN80.67%TN10∶0TN74.93%TN21．7071395NH+4-NTNFig．5NH+4-NandTNremovalefficienciesofthesystemunderdifferentoperationalconditionsNH+4-N、NO－3-N6NH+4-N6NH+4-NNO－3-NFig．6NH+4-NandNO－3-NconcentrationsindifferentstagesunderdifferentoperationalconditionsBAFNH+4-NNO－3-NBAFNH+4-N86.18%22．NO－3-N80714A2/O-BAF1BAFNO－3-NBAF75%BAF．NH+4-NBAFNH+4-N5∶5TN80%TN7∶3TN14.10mg·L－175.45%10∶0NO－3-N13mg·L－1TN5∶523．NO－3-N18NO－3-NTN．2.3TP7．TP1.76mg·L－17.65mg·L－1TP0.74、0.55、0.44、0.63mg·L－188.03%、89.17%、91.20%、87.20%TP7∶3TP0.39mg·L－1．7TPFig．7TPremovalefficienciesofthesystemunderdifferentoperationalconditions8PAOs11．PAOsPAOsDPAOsPHBNO－3-NDPAOs244HＲT3.2、2.66、2.28、1.6hHＲT2.28hTP25C2h．HＲTPAOsHＲTPAOs18A2/O-BAFPAOs．DPAOsHＲTDPAOs．8PO3－4-PFig．8PO3－4-PconcentrationsindifferentstagesunderdifferentoperationalconditionsPAOs、/9．9071399/Fig．9Anaerobicphosphorusreleaseandanoxic/oxicphosphorusuptakeunderdifferentoperationalconditions10∶046.18mg·L－1．10、/Fig．10ＲanmaxPUＲanmaxPUＲomaxandDPAOs/PAOsunderdifferentoperationalcondition