低DO协同负荷引发的黏性膨胀和丝状菌膨胀桂丽娟

　62　7　　　　　　　　　　　　Vol.62　No.7　20117　　CIESC　Journal　　　July　2011DO桂丽娟1,3,彭永臻1,2,甘冠雄2,彭赵旭1,侯红勋3,王　淦3,史昊然3(1,150090;2,100022;3,230088):DO,SBR,DO0.5mg·L-1,pH7.2～8.0,(23±0.5)℃,MLSS3000～3500mg·L-1,0.22、0.44、0.66gCOD·(gMLSS)-1·d-1,SVI、、、、。,DO(0.5mg·L-1),0.22gCOD·(gMLSS)-1·d-1,,。,0.66gCOD·(gMLSS)-1·d-1,0.44gCOD·(gMLSS)-1·d-1。,,,SS。,,。SOUR,。:DO;;;;SOUR;SNDDOI:10.3969/j.issn.0438-1157.2011.07.038:X703.1　　　　　　:A:0438-1157(2011)07-2042-07ActivatedsludgebulkinginitiatedbycooperationoflowDOandsludgeloadsGUILijuan1,3,PENGYongzhen1,2,GANGuanxiong2,PENGZhaoxu1,HOUHongxun3,WANGGan3,SHIHaoran3(1SchoolofMunicipalandEnvironment,HarbinInstituteofTechnology,Harbin150090,Heilongjiang,China;2KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,CollegeofEnvironmentandEnergyEngineering,BeijingUniversityofTechnology,Beijing100022,China;3AnhuiGuozhenEnvironmentalProtectionSci.&Tech.Co.,Ltd.,Hefei230088,Anhui,China)Abstract:TheSVI,sludgebulkingtype,SOUR,thedenitrificationanddephosphorizationefficiency,SNDrateofactivatedsludgesystemwereinvestigatedinasequencingbatchreactor(SBR)atlowDOloading(0.5mg·L-1),pH7.2—8.0,temperature(23±0.5)℃,MLSS3000—3500mg·L-1.TheresultsshowedthatatlowDOlevels,thebulkingofsludgeisnotobservedatloadof0.22gCOD·(gMLSS)-1·d-1,whilethedeteriorationofSVIacceleratesandtypeofsludgebulkingchangeswiththeincreaseofsludgeloads.At0.66gCOD·(gMLSS)-1·d-1loading,non-filamentousbulkingofactivatedsludgeisobservedandthedenitrificationanddephosphorizationefficiencygoesdown,butat0.44gCOD·(gMLSS)-1·d-1filamentousbulkingtakesplace,thedenitrificationanddephosphorizationefficiencykeepswell,therateofphosphorusabsorptionisfaster,andSSineffluentisalmostnegligible.TheSNDrateisthemaximumatnobulkingofactivatedsludge,mediumathavingnon-filamentousbulking,　　2010-10-15,2011-01-07。:。:(1986—),,。:(50778005);(QAK201006)。　　　Receiveddate:2010-10-15.Correspondingauthor:Prof.PENGYongzhen,[e-mail]　Foundationitem:supportedbytheNationalNaturalScienceFoundationofChina(50778005).　andminimumatfilamentousbulking.IfSOURwasover-highitisverypossibletodroopsludgesettleabilityandtodeterioratewaterqualityineffluent.Keywords:lowDO;sludgeload;non-filamentousactivatedsludgebulking;filamentousactivatedsludgebulking;SOUR;SND　,、、。。,,,[1]。,,。,[2],,COD、、,,,。,,,。:、、;、、。DO。。,。,,。Pipes32,0.25～0.45gCOD·(gMLSS)-1·d-1,SVI。Chao[3],0.6～1.3gCOD·(gMLSS)-1·d-11.8gCOD·(gMLSS)-1·d-1。DO。Palm[4]S.natans,DOF/M。DO,。,SBR,DO,、、SND;,。1　1.1　,,CH3COONa、NH4Cl、KH2PO4。NaHCO3,;MgSO4CaCl2Mg2+Ca2+。。1。1　Table1　CompositionofsyntheticwastewaterComponentWaterqualityindexQuantity/g·L-1Density/mg·L-1CH3COONaCOD0.66514NH4ClNH+4-N0.1744KH2PO4PO3-4-P0.024.6NaHCO3alkalinity0.04400CaCl20.04MgSO40.08nutrientsolution0.3ml·L-11.2　SBR1。,,,12L,3。10cm,。,。,,,(23±0.5)℃。pH、DO、ORP,。3SBR,,3SBR(MLSS)(SVI)3000mg·L-1、95ml·g-1。3SBR,·2043·　7　　:DO1　Fig.1　Schematicdiagramofexperimentalequipment1—DOmeter;2—pHmeter;3—waterstoragetank;4—speedregulator;5—DOprobe;6—pHprobe;7—ORPprobe;8—samplingplace;9—ORPprobe;10—rotameter;11—aerationvalue;12—aerationjoint;13—purgevalue　:、(3h)、(6h)、(3h)。2,。,0.25gCOD·(gMLSS)-1·d-1,0.5gCOD·(gMLSS)-1·d-1[5-6]。,3SBR,,(2)。2。2　Table2　OperationparametersofSBRsystemOperationparameterSBR1SBR2SBR3influentvolume/L642sludgeloads/gCOD·(gMLSS)-1·d-10.660.440.22sludgedischarge/ml·cycle-1390260130SRT/d152346HRT=reactiontime/(influent　volume/totalvolume)/h6918aerobictime/h3MLSS/mg·L-13000—3500T/℃23±0.51.3　NH+4-N:;NO-3-N:;NO-2-N:N-(1-)-;PO3-4-P:;SOUR[7];COD、SV、SVI、MLSSMLVSS[8];DO、pH、ORPWTWinoLabOxilevel2;NDJ-79;OLYMPUSBX51/BX52。2　2.1　DO0.5mg·L-1,0.440.66gCOD·(gMLSS)-1·d-1,,0.66gCOD·(gMLSS)-1·d-1,;0.22gCOD·(gMLSS)-1·d-1,(2)。,DO,[9],。,,SBR1,,,,,;,SBR2,,SBR3。,。2　SBRSVIFig.2　VariationsofSVIinSBR2.2　SBR1,SVI150ml·g-1;1.42mPa·s-1;[3(a)],,FI,FI1。3·2044·　　　　　62　3　72Fig.3　Microbialmorphologyunderthe72ndcircle　,:①SVI150ml·g-1;②1.5mPa·s-1;③FI()1。FI[10]。SBR1。SBR2,SVI150～300ml·g-1(2),。1.28mPa·s-1,(SBR3,1.26mPa·s-1),,。3(b),SBR2,,[11]。[2],SVI150～300ml·g-1。SBR2。[12-14]。SOUR3SBR。SOURSVI(4)。SBR3,SVI95ml·g-1,SOUR,30mgO2·(gMLSS)-1·h-1。SBR1SBR2,SOUR,SBR1,SVI,SOUR。SOUR,。[15-17]:,DO。DO,,4　SBRFig.4　SOURinSBR　,。3SBRDO(0.5mg·L-1),,3SBR,SOUR,。SBR1,,,,DO,DO,,,;SBR1[18]。,Chudoba[19],,μmaxKs,,,,,。SBR2,,,,。SBR3,,,DO0.5mg·L-1,,,。2.3　2.3.1　膨胀时的COD去除效果　,,COD,CODB,CODA。SBR1、SBR2SBR3COD85%、91%、90%(3)。,·2045·　7　　:DO3　COD、SSTable3　RemovaleffectofCODandSSItemNon-filamentousactivatedsludgebulking(SBR1)Filamentousactivatedsludgebulking(SBR2)Sludgesettledproperly(SBR3)CODremovalrate/%859190effluentSS/mg·L-1501—28—11COD,20～30min,COD。COD。DOCOD。2.3.2　膨胀时的氨氮去除效果　,。SBR2,,,(5),98%。,。DO,,MLSS,。。,,DO,,。DO,。。。4,SBR1SOUR,,。SBR122,,。,,,。,SBR,。SBR1,(2)。2.3.3　膨胀时的磷去除效果　SBR,。,DO,,PHBATP,。,。DO,SBR。,0.22gCOD·(gMLSS)-1·d-10.44gCOD·(gMLSS)-1·d-1,96%,PO3-4-P0.5mg·L-1(5)。[20],SBR,、。,DO。5　NH+4-NPO3-4-PFig.5　NH+4-NandPO3-4-Ptreatmenteffectiveness　,。SBR1,65,。:,,,,。SBR1,。,。,,,,,,,。SBR2,SBR3,0.0058h-10.0039h-1,SBR2·2046·　　　　　62　,,M.parvicella[21]。,,。2.3.4　膨胀时的TN去除效果　(6)。。,0.5mg·L-1,SND。[15-17],DO,,,DO、、,、。,DO,,,;,DO,,,,。,[22]。C/N。C/N10∶1,Chiu[23