SRT对初沉污泥水解酸化影响的试验研究任健

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SRT任 健1,2, 李 军1,2, 王洪臣3, 甘一萍3, 周 军3, 张 帅1,2(1.北京工业大学建筑工程学院,北京100022;2.北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100022;3.北京城市排水集团有限公司,北京100031)   : 采用城市污水处理厂的初沉污泥进行碳源开发试验。在水解酸化池的HRT为32h、温度为35℃、污泥回流比为1的条件下,考察了SRT对水解酸化效果的影响。结果表明,当SRT=4d时系统的产酸效果最佳,出水SCOD稳定在1178.19mg/L左右,TOC保持在517.34mg/L左右,水解酸化池的碱度维持在约854.3mgCaCO3/L;当SRT为10d时,系统的产酸效果恶化并进入产甲烷阶段。碱度能够反映初沉污泥水解酸化系统的产酸效果,当碱度维持在854.3~1029.3mgCaCO3/L时,水解酸化系统能够保持良好的产酸效果,这对于提高碳源受限型污水的脱氮除磷效率及降低城市污水处理厂的运行成本具有重要意义。  : 初沉污泥; 污泥停留时间; 产酸效果; 碳源:X703  :A  :1000-4602(2009)05-0015-05InfluenceofSRTonHydrolysisandAcidificationofPrimarySludgeRENJian1,2, LIJun1,2, WANGHong-chen3, GANYi-ping3, ZHOUJun3, ZHANGShuai1,2(1.CollegeofArchitectureandCivilEngineering,BeijingUniversityofTechnology,Beijing100022,China;2.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China;3.BeijingDrainageGroupCo.Ltd.,Beijing100031,China)  Abstract: Carbonsourcedevelopmentwithhydrolysisandacidificationofprimarysludgefromwastewatertreatmentplantswasstudied.TheinfluenceofSRTonthehydrolysisandacidificationwasin-vestigatedundertheconditionsofHRTof32h,temperatureof35℃andsludgerefluxratioof1.ThebestacidogenesiseffectisachievedwhenSRTis4d.TheeffluentSCODandTOCare1178.19mg/Land517.34mg/L,andthealkalinityofthehydrolysisandacidificationtankis854.3mgCaCO3/L.WhenSRTis10d,theacidogenesiseffectofthehydrolysisandacidificationtankisdeteriorated.Alka-linitycanshowtheacidogenesiseffectofthehydrolysisandacidificationsystem.Whenalkalinityis854.3to1029.3mgCaCO3/L,thesystemcanmaintaingoodacidogenesiseffect,whichisimportantforimprovingnitrogenandphosphorusremovalefficiencyofcarbonsource-limitedwastewaterandreducingtheoperationcostofmunicipalWWTP.  Keywords: primarysludge; sludgeretentiontime; acidogenesiseffect; carbonsource  :(50678008); (KM200510005006); (PHRIHLB)·15·第25卷 第5期2009年3月            中国给水排水CHINAWATERWASTEWATER             Vol.25No.5Mar.2009  ,,,、,,。。,,。2080,,(VFA),[1、2]。,,。、,,,“”[3、4]。,。HRTSRT、,,,。1 试验装置与方法1.1 1。1 Fig.1 Flowchartofprimarysludgehydrolysisacidification,50L,,。35℃,,。1.2 ,,。,,,,。,,,3d,,。1.3 ,,1mm×1mm,,,。。1。1 Tab.1 Physicochemicalparametersofprimarysludge pH6.6~6.91.02~1.03/(mgCaCO3·L-1)475~590TCOD/(mg·L-1)21300~25000 TOC/(mg·L-1)124~152SCOD/(mg·L-1)175~280MLSS/(mg·L-1)16500~23540/(g·cm-3)1.3~1.51.4 ,、。2。2 Tab.2 Parametersandanalyticalmethods TCOD、SCODMLSS TOCTOCVFApHpH  ,,3。·16·第25卷 第5期              中国给水排水             Tab.3 Methodsforsamplepretreatment SCODVFATOC5000r/min10min1mL10%0.3mL25%,、0.45μm0.45μm2 结果与讨论2.1 SRT,SRT;,SRT。,,SRT。,SRT,HRT32h,4SRT(2、4、7、10d)。SCODSCODTOC,2。2 SRTSCODFig.2 VariationofSCODininfluentandeffluentwithdifferentSRT120d,SRT4d,SRT7d,SRT10d,SCODSCOD,SCOD,SRT,,VFAs。SRT2d,,。2,SCOD、TOC,SRT=2d,,22。4SRT,SCOD、TOC4。4 SCOD、TOCTab.4 AverageSCODandTOCineffluentunderdifferentSRTSRT/d24710SCOD/(mg·L-1)768.821178.19971.5252.92TOC/(mg·L-1)345.93517.34407.6790.54  2,SRT,SCOD,SRT=2dSRT=4d,SRT=7dSRT=10d,SRT。SRT=2d,21,,,,;SRT=4d,8d,,。SRT7d10d,SCOD,SRT,,VFAs,SCOD、TOC。SRT=7d,SCOD、TOCSRT=4d,971.5、407.67mg/L;SRT10d,SCODSRT,,,。2.2 SRT,,[5]。,SRT。SRT3。3,SRT,SRT,MLSSMLVSS·17·任 健,等:SRT对初沉污泥水解酸化影响的试验研究第25卷 第5期,MLVSS/MLSS。SRT,。SRT=2d,,SRT,,;SRT4d,,,SCOD、TOC;SRT7d,MLSS、MLVSS,SCOD、TOC,,,;SRT10d,SCOD、TOC,,VFAs。3 SRTMLVSS/MLSSFig.3 VariationofMLSSandMLVSS/MLSSwithdifferentSRT,MLSSMLVSS,,5,。120d,MLVSS/MLSSSRT,0.63~0.73,,,。2.3 SRTVFA(20%,80%)[6、7]。,pH。pH5.0~8.5,pH5.0,pH6.5~7.8,pH[8]。[9]pH。pH,、,,pH,。RaghidLep-isto[10],VFA,VFA,VFA,。SRTpH4。4 SRTpHFig.4 VariationofalkalinityandpHvaluewithdifferentSRT4,SRTpH,pH,。SRT=2d,568mgCaCO3/L;SRT4d,,,854.3mgCaCO3/L;SRT7d,,1029.3mgCa-CO3/L;SRT10d,,1595.6mgCaCO3/L。,,。SRT:10d4d7d2d。2:SRT=4d,,SRT=10d,。,854.3~1029.3mgCaCO3/L,。·18·第25卷 第5期              中国给水排水             结论① SRT。HRT32h、35℃、1、SRT4~7d,。② SRT,MLVSS/MLSS,。③ 854.3~1029.3mgCaCO3/L,,。:[1] BanerjeeA,ElefsiniotisP,TuhtarD.Theeffectofaddi-tionofpotato-processingwastewaterontheacidogenesisofprimarysludgeundervariedhydraulicretentiontimeandtemperature[J].JBiotechnol,1999,72(3):203-212.[2] HatziconstantinouGJ,YannakopulosP,AndreadskisA.Primarysludgehydrolysisforbiologicalnutrientremoval[J].WaterSciTechnol,1996,34(2):417-423.[3] ,,.[J].,1994,21(4):207-209.[4] ,.[J].,1998,18(5):398-402.[5] HuangXia,GuiPing,QianYi.Effectofsludgeretentiontimeonmicrobialbehaviorinasubmergedmembranebioreactor[J].ProcessBiochem,2001,36(10):1001-1006.[6] .(4)[M].:,2002.[7] AndersonGK,YangG.Determinationofbicarbonateandtotalvolatileacidconcentrationinanaerobicdigest-ersusingasimpletritration[J].WaterEnvironRes,1992,64:53-59.[8] .[M].:,1998.[9] ,,,.[J].,2003,35(9):1105-1108.[10] RaghidLepisto.Extremethermophilic(70℃),VFA-fedUASBreactor:performance,temperatureresponse,loadpotentialandcomparisonwith35and55℃UASBreactors[J].WaterRes,1999,33(14):3162-3170.:(1984- ), , , , 。:13911800049E-mail:wateren@126.com::2008-10-13(上接第14页)[9] ,.[J].,2007,23(14):18-22.[10] ,.[J].,2007,23(4):1-4.[11] ChoiYG,ChungTH.Effectsofhumussoilontheset-tlinganddewate

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