SBR法处理工业废水中pH值对污泥膨胀的影响

SBRpH＊丁　峰(,266033)　彭永臻(,100022)　支霞辉(,200092)　主要研究了在SBR法处理啤酒废水和化工废水中pH值对污泥膨胀的影响。试验研究的结果表明,进水的pH值在5.0～6.0,啤酒废水长期保持进水pH值为5.0时,活性污泥的污泥指数SVI100mLg,当pH值5.0～2.5时,会引起活性污泥活性抑制和污泥上浮(尤其是化工废水)。进水pH值在9.0～12.0时,2种废水的污泥指数略有上升,但SVI110mLg,活性污泥皆表现出活性的抑制和污泥的解体。若进水的pH值在3.5～7.0,且控制反应周期内pH值不变,则2种废水的活性污泥上浮加剧,化工废水污泥较啤酒废水的污泥上浮程度更严重。在整个试验过程中,镜检未见过量真菌和其它丝状菌,可见用SBR法处理工业废水时,过低或过高的pH值不一定引起污泥膨胀。　pH值　SVI(污泥指数)　SBR　活性污泥膨胀　　　　　　　　＊(59778024)1　(ActivatedSludgebulking),,[1～5]。,pH,[6～8],。:(),SBRpHpH。2　SBR(SequencingBatchReactor,1。2SBR,38L,,SBR,,20℃。,、。,2BOD5∶N∶P=100∶5∶1,pH。3　3.1　进水pH值不同时其反应过程pH值的变化情况CODCr=800mgL,1.5h,1　SBR1—;2—;3—;4—;5—ORP;6—;7—;8—;9—;10—;11—;12—;13—。2pH5.0,6.0,11.0。pH≤5.0,pH,,。pH6.0。,pH,,,pH,2pH11.0,pHNH3,。3.2　进水pH值对活性污泥沉降性能及污泥膨胀的影响2CODCr800mgL,1.5h,0.7m3h,,MLSS29　　　200422212000mgL,CODCr6.9kgkg·d,2pH7.02.0,7.012.0。2pH1。1　pHpHpHpH1～67.07～106.511～166.017～225.523～325.033～444.545～504.051～563.557～603.061～622.563～707.071～748.075～789.079～8210.083～8411.085～8612.0　　1,SV%、MLSS、SVI、CODCr。2SVICODCr2。2　SVICODCr2,10pH7.0、6.5,,2SVI70～90mLg,CODCr100mgL。pH5.5～6.0(11～22),CODCr,SVI;CODCr、SVI。pH5.02.5,2CODCr,,60473mgL,167mgL,SVI,48,SVI100mLg。pH8.0～10.0,SVI(108mLg),SVI(35mLg)。pH11.0～12.0,SVI60mLg,CODCr,SVI,CODCr,283mgL。、SBR。pH6.0～7.0,,SVI,CODCrMLSS,DO2.0mgL,65minDO,。(3)。3　pHDOpH6.0～5.0,,,,,,,,,pH,CODCr。3,DO,90minDO,。DO75min。pH≤5.0,,、,,;SSCODCr;,,,。pH,,,。pH,pH,,,,pH,CODCr,pH=2.5,CODCr473mgL,≤50%。,,pH,,。,CODCr,200mgL,,,pH,2SVI40～60mLg。2pH8.0～12.0,,CODCr150mgL,SVI107mLg,,DO,30　　　20042221。pH=12.0。,pH≥11.0,,,CODCrSS。,,,,,,。7.0pH≤9.0,pH,,(),,SVI,pH9.0,,,()、、。3.3　长期低pH值运行时引起的污泥膨胀pHpH,。CODCr=800mgL,1.5h,0.7m3h,pH7.05.0,,MLSS2000mgL。764。4,pH=7.0,CODCr100～150mgL,SVI70～100mLg,,。pH=5.0SVI(70～100mLg),CODCr,150～350mgL。,,,。4　pHSVICODCr3.4　控制反应过程pH值不变,pH值对活性污泥性能的影响2CODCr800mgL,1.5h。0.7m3h,MLSS2000mgL。H2SO4(NaOH)pH,pH,2,pH7.03.5,42,5。5　SVICODCr(pH)2　pHpHpH1～47.015～225.05～106.023～344.011～145.535～423.5　　5,pH,pH5.0,pH,pH。pHpH,SVI,CODCr,。pH。CODCr。pH5.5,,pH3.5,,,。SVI,60mLg。,pH,,,SVI,100mLg,。4　(1)SBRpH,,pH5.0～6.0,pH5.0,SVI100mLg。pH5.0～2.5(),pH9.0～12.0,2,SVI110mLg,。(2)pH3.5～7.0,pH,2,。(3),31　　　20042221,SBR,pH。1　JiriWanner.TheImplementationofBulkingControlintheDesignofActivatedSludgeSystems.Wat.Sci.Tech.1994.29(7):193～202.2　ImreT.,Ernofleit.ModelingoftheMicromorphologyoftheActivatedSludgeFloc:LowDO,LowFMBulking.Wat.Sci.Tech.1995.31(2):235～243.3　ValterTandoi,SimonaRossetti.Etal.SomePhysiologicalPropertiesofanItalianIsolateofMICROTHEIXPARVICELLAWat.Sci.Tech.1998.37(4—5):1～8.4　S.KnoopandS.Kunst.InfluenceofTamperatureandSlugeLoadingonActivatedSludgeSetting,especiallyonMICROTHEIXPARVICELLA.Wat.Sci.Tech.1998.37(4—5):27～35.5　Sezign,M.,Jenkins,D.,Parker,D.S.AUnifiedTheoryofFilamentousActivatedSludgeBulking.J.Wat.PollControlFeb.1978.50:362～368.6　..:,1992.7　F.Strom,D.Jenkins.IdentificationandSignificanceofFilamentousMicroorganismsinActivatedSludge.J.WPCF.1984.56(5):449～459.8　WesleyO.Pipes.Bulking,DeflocculationandPinpointFloc.J.WPCF,1979.51(1).　　266033　11　　(0532)5073982E-mail　[e-mail]2003-04-08＊罗固源　吉芳英　罗　宁　许晓毅(B,400045)　经研究发现AAA-SBR系统中的活性污泥可以利用硝酸盐作为电子受体进行缺氧吸磷并同时发生反硝化脱氮。试验利用“双泥”系统进一步探讨了污水生物反硝化同时除磷的可能性,结果表明:“双泥”系统的“双重”吸磷以及内碳源反硝化除磷方式可以使生物处理出水磷酸盐浓度趋近于零,TP≤0.23mgL、NH3-N≤0.5mgL、TN≤8mgL、CODCr≤25mgL。　反硝化除磷　生物处理　SBR系统　“双重”磷吸收　内碳源反硝化　　　　　　　　＊(50278101)、(1-57)1　,,,,、,。[1],NO-3[2,3],“--(anaerobic-anoxic-aerobic)”,,“”。“”,、。2　2.1　试验工艺2SBR,“AAA-SBR”“N-SBR”。2SBR,,。1,:(1)AAA-SBR(anaerobic-anoxic-aerobic-SBR):--,、、。8h,:1h※N-SBR0.5h※1.5h※4h※1h。32　　　20042221reachedBOD5removalsefficiencywithanaverageof80%.IthasbeenfoundbyobsarvationsthatBOD5concentrationscanbewellreflectedbyadesignequationbasedonhydraulicloading.Keywords　biologicaltreatmentofwastewater,high-ratebiofilter,hydraulicloadingandfilterkineticsDESIGNANDSTUDYONMAZETYPEBIO-CARRIERSEPARATORFORAERATEDBIOLOGICALFLUIDIZEDREACTORZhangYukuietal(25)…………………………………………………………Abstract　Mazetypebio-carrierseparatorisanimportantpartofthenewaeratedbiologicalfluidizedreactor.Thisbio-carrierseparatorcaneffectivelyseparatecarrier,liquidandgastoensurenormalrunningofthereactor.Separatedeffectofthebio-carrierseparatorisaffectedbystructuralfactorsandrunningparameters.Studyresultsindicate:boththepositionoftheseparatorinthereactoranddistancebetweentwolayersreflectionconeshaveoptimumvalues.Accordingtodifferentairsupply,thereisacriticalvaluetoseparatedeffectofseparator.Whentreatingwastewaterwithdesignedaeratedbiologicalfludizedreactor,airsupplyneededislessthancriticalvalue,sothebio-carrierseparatorcanreachto100%separatedeffect.Keywords　mazetype,bio-carrierseparatorandbiologicalfluidizedreactorEFFECTSOFpHONACTIVATEDSLUDGEBULKINGININDUSTRIALWASTEWATERTREATMENTBYSBRDingFengetal(29)…………………………………………………………………………………Abstract　ThepaperintroducedtheeffectsofpHonactivatedsludgebulkinginbrewery&chemicalwastewatertreatmentbySBR.TheresultsshowedthatSVIlessthan100mLgduringthestageswhilepHofintakewastewaterwasfrom5.0to6.0and5.0individualstageofbrewery'skeepingalongperiod.Sludgeactivationwasrestrained&sludgefloatedwhenpHwasfrom5.5to2.5(especiallyinchemicalwastewater).SV