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Eco-EnvironmentalKnowledgeWebEnvironmentalScience40320193Vol．40No．3Mar．2019SPNDPＲC/N*266071C/N180min/SBＲL·min·L－1．0.125L·min·L－10.025L·min·L－13h6hSPNDPＲ．0.025L·min·L－1、6hSPNDPＲNH+4-N、NO－2-N、NO－3-NPO3－4-P0、8.62、0.060.03mg·L－1TN9.22mg·L－1TN87.08%．0.125L·min·L－10.100L·min·L－10.100L·min·L－10.075L·min·L－10.16mg·L·min－1．0.050L·min·L－10.025L·min·L－10.09mg·L·min－10.06mg·L·min－1．0.125L·min·L－10.100、0.075、0.050、0.025L·min·L－13h6hSPNDSND19.57%72.11%TN62.82%87.08%．SPNDPＲ、、、C/N．X703.1A0250-3301201903-1382-08DOI10．13227/j．hjkx．2018080182018-08-022018-09-195177830451708311ZＲ2017BEE0022017M6122091993～E-maily_yuanmengfei@126．com*E-mailelainewangxx@163．comNitrogenandPhosphorusＲemovalfromLowC/NMunicipalWastewaterTreatedbyaSPNDPＲSystemwithDifferentAerationandAerobicTimesYUANMeng-feiYUDe-shuangGONGXiu-zhenWANGXiao-xia*CHENGuang-huiDUShi-mingZHENJian-yuanSchoolofEnvironmentalScienceandEngineeringQingdaoUniversityQingdao266071ChinaAbstractAnanaerobic180min/aerobicoperatedsequencingbatchreactorSBＲfedwithurbansewagewasoptimizedbyregulatingtheaerationquantitytoinvestigatethedeep-levelnitrogenNandphosphorusPremoval．TheamountofaerationwasregulatedbyadjustingthevolumeofgasperunitvolumeofreactorpassedinunittimewhentheunitisL·min·L－1from0.125L·min·L－1graduallyto0.025L·min·L－1andaerobictimesfrom3hto6h．TheexperimentalresultsshowthattheeffluentNH+4-NNO－2-NNO－3-NandPO3－4-PconcentrationsoftheoptimizedSPNDPＲsystemwere08.620.06and0.03mg·L－1．TheeffluentTNconcentrationwasabout9.22mg·L－1andtheTNremovalefficiencywasupto87.08%．Whentheaerationquantitywasdecreasedfrom0.125L·min·L－1to0.100L·min·L－1thendecreasedto0.075L·min·L－1thenitrificationrateofthesystemrecoveredandstabilizedat0.16mg·L·min－1．Howeverwhentheaerationquantitycontinuouslydecreasedto0.050L·min·L－1andthento0.025L·min·L－1thenitrificationratedecreasedto0.09mg·L·min－1and0.06mg·L·min－1．Withreductionoftheaerationquantityfrom0.125L·min·L－1to0.1000.0750.050and0.025L·min·L－1andextensionofaerobictimefrom3hto6htheTNremovalefficiencyincreasedgraduallyfrom62.82%to87.08%andtheSNDefficiencyincreasedfrom19.57%to72.11%．ItwasproventhatreducingtheaerationquantitycanenhancetheSPNDfunctionanddeepdenitrificationbythesystemwasrealized．Byenhancingtheanaerobicintracellularcarbonstorageandaerobicphosphorusuptakedenitrifyingphosphorusremovalpartialnitrificationandendogenousnitrificationwereachieved．TheSPNDPＲsystemafterreducingaerationandprolongingaerobictimewasabletorealizedeep-leveldenitrificationanddephosphorizationusinglowC/Nurbansewage．Keywordsaerationquantitysimultaneouspartialnitrification-endogenousdenitrificationphosphorusremovalSPNDPＲintracellularcarbonstorageCODinsC/NratiophosphorousaccumulatingorganismsPAOsPNDOSＲTNOBNO－2-N1、2．SND3～9．3SPNDPＲC/NSPNDPNSNDNH+4-NAOBNO－2-NN210、、．EBPＲ11～14．EBPＲPAOsPAOs15．DPＲNO－2-NNO－3-N16．EBPＲDPＲPO3－4-P．17～19、DO2021、22～2526C/NSPNDPＲ．SPNDPＲSNDSPNDPＲ“”27．SPNDPＲ28SPNDPＲ．C/N≤4/SBＲ/SＲTL·min·L－1SPNDPＲCOD、、SPNDPＲC/N．11.1SBＲ13L8L．/1．SPNDPＲ0.125L·min·L－1、3hNH+4-N、NO－2-N、NO－3-N、PO3－4-PCOD0.35、20.05、0.42、0.4763.55mg·L－1．1SPNDPＲ1Table1ＲunningparametersduringtheoptimaloperationoftheSPNDPＲsystem11～28d229～53d354～77d478～97d598～118d/L888883∶83∶83∶83∶83∶8/min180180180180180/min180180300*300360SＲT/d1010101010HＲT/h161621.3321.3324/L·min·L－10.1000.0750.0500.0250.025DO/mg·L－1≤0.8≤0.6≤0.5≤0.3≤0.31*0.075L·min·L－10.050L·min·L－1180minNH+4-N23.15mg·L－1FA300min1.2COD176.75～572.48mg·L－1NH+4-N53.99～92.84mg·L－1NO－2-N＜1mg·L－1NO－3-N＜1mg·L－1PO3－4-P3～10.25mg·L－1pH7.2～7.6．SPNDPＲMLSS4016mg·L－1SV21%SVI52.29mL·g－1．1.31.3.115～20μmNH+4-NNO－2-NN-1-NO－3-NPO3－4-PCOD5B-3ACODMLSSDOpHPHS-3CpH．3831401.3.2CODinsCODinsSPNDPＲCODPAOsGAOs．CODinsmg·L－1=ΔCOD－1.71ΔNO－2+2.86ΔNO－3ΔCOD、ΔNO－2ΔNO－3COD、NO－2-NNO－3-Nmg·L－11.712.86NO－2-NNO－3-NCOD．1.3.3SNDSNDSPNDPＲSND=1－ΔNO－2+ΔNO－3ΔNH+[]4×100%ΔNH+4、ΔNO－2ΔNO－3NH+4-N、NO－2-NNO－3-Nmg·L－1．22.1SPNDPＲCOD1SPNDPＲCOD、COD、CODins、CODCOD．11～28d0.125L·min·L－10.100L·min·L－1COD302.62mg·L－1COD75.25mg·L－164.83mg·L－144.64mg·L－133.08mg·L－1．CODins26.47mg·L－151.90mg·L－1．SPNDPＲ．COD151.31g·m3·d－1COD90.24g·m3·d－1110.36g·m3·d－1COD73.57%86.97%．1SPNDPＲCODCODCODinsFig．1VariationsofCODconcentrationremovalefficiencyandCODinsduringtheoptimaloperationoftheSPNDPＲsystem229～53d0.100L·min·L－10.075L·min·L－1COD293.32mg·L－1COD70.59mg·L－158.75mg·L－144.81mg·L－138.25mg·L－1．COD146.66g·m3·d－1COD103.37g·m3·d－1124.54g·m3·d－1COD77.87%84.40%．354～77d0.075L·min·L－10.050L·min·L－13h5hCOD319.24mg·L－1COD56.63mg·L－153.25mg·L－169d71.17mg·L－168.58mg·L－145.99mg·L－141.64mg·L－1．COD117.08g·m3·d－197.11g·m3·d－164d97.17g·m3·d－179.23g·m3·d－1117.35g·m3·d－1101.71g·m3·d－1COD82.94%69d78.85%86.43%．4～578～118d48313SPNDPＲC/N0.050L·min·L－10.025L·min·L－15h6hCOD309.78mg·L－1COD41.47mg·L－136.18mg·L－1COD87.30%90.35%．45COD117.45g·m3·d－1102.16g·m3·d－1COD104.01g·m3·d－191.99g·m3·d－1．SPNDPＲCODCOD102.16g·m3·d－1COD91.99g·m3·d－1COD90%．2～5CODins64.24mg·L－189.74mg·L－1．0.075L·min·L－10.025L·min·L－13h6hSPNDPＲ．2SPNDPＲPO3－4-PFig．2VariationsofthePO3－4-PconcentrationandremovalefficiencyduringtheoptimaloperationoftheSPNDPＲsystem2.2SPNDPＲ2SPNDPＲPO3－4-P．11～28d0.125L·min·L－10.100L·min·L－11～1