SBR处理废水中的污泥膨胀与控制刘大鹏1

SBR刘大鹏　曾光明　王　薇　邹　亮(,410082)　王永福(,201900)　通过土豆食品加工废水处理的工程实例,指出在处理易生物降解和溶解性有机废水的SBR系统中,采用较高负荷运行会发生溶解氧偏低而造成的污泥膨胀。探讨了污泥膨胀的原因,并详细介绍了控制膨胀的措施。　SBR　污泥膨胀　溶解氧(DO)　控制1　,90%[1]。SBR,,。2　,1。1000m3d,“-SBR”。SBR,0.30kgkg·d,MLSS2500mgL,1∶3,(),3(12)。:10.0h,1.0h、6.0h、1.5h,1.0h、0.5h。1　CODCrmg·L-1BOD5mg·L-1NH3-Nmg·L-1SSmg·L-1pH1200～1500800～100020～30250～3506.0～7.0　　19995。,24h,、(BOD5CODCr0.6),,《(GB8978-96)》。3　20001,,,CODCr1600～1800mgL。,SBR,。,。3.1　污泥膨胀发生20002,2SBR,SVI320～360,,。:,。;、,。(DO)1。1　3.2　污泥膨胀原因分析0.30kgkg·dSBR,,,[2]。,Monod,,,。,,[3]。,,,。,,,。,,17　　　200310215DOI:10.13205/j.hjgc.2003.05.005,,,。,,,。3.3　控制污泥膨胀的对策和过程220。,SV90%。,。2,2.0mgL,。100∶20∶4C、N、P,,,。3.0h,2.0h,、,。,,SV,。、,,,1∶31∶4,,。,SBR,,。,1.5h,(),、,。,,1.5mgL。,,(2.5mgL),。4,SIV(2),CODCr200mgL;,。,,,。1,、,MLSS3000mgL,,1DO1.5mgL。,MLSS3000mgL,,SVI,18,SVI200(2),CODCr100mgL。:,,;,。2　SBRSVI4　SBR,。,SBR,,。,。,,。。SBR,。,,,。1　..:,1992.2　J.Chudobaetal.ControlofActivitySludgeFilamentousBulking:ExperimentalVerificationofaKineticSelectionTheroy.Wat.Res.,1985.19(2):567.3　Palm,J.C.etal.Relationshipbetweenorganicloading,DissolvedOxygenConcentrationandSludgeSettleabilityintheCompletely-mixedactivatedsludgeprocess.Wat.Pollut.ControlFed.,1980.57(10):2484～2506.　　410082　　(0731)8822829E-mail　[e-mail]2002-11-0518　　　200310215EFFECTSOFINORGANICSALTSONTHESETTLEABILITYOFACTIVATEDSLUDGEWangShuyingetal(7)………………………………………………………………………………………………………………………Abstract　Thisstudywasinitiatedtoexploretheeffectsofinorganicsaltsonactivatedsludgeinordertocarryouttheprojecttouseseawaterforflushingtoilets.Withsystemtreatingfreshsewageascontrolsystem,experimentswereconductedtorespectivelyinvestigatethemorphologicalcharacteristicsofactivatedsludgefloc,activatedsludgesettleabilityandmicrobiologicalecologyinthe25gLsaltacclimatedandthe35gLsaltacclimatedactivatedsludgesystem.Thestructureofactivatedsludgeflocwasfurtherexplored.Theresultsindicatedthatinorganicsaltschangemicrobiologicalecologyandthestructureofflocaswellasstrengthenactivatedsludgesettleability.Keywords　flushingtoiletsbyseawater,salinity,activatedsludgesettleabilityandactivatedsludgeflocLAWOFOXYGENTRANSFERINPRESSUREBIOCHEMICALREACTORCaoJinghuaetal(10)……………………………………………………………………………………………………………………………………………Abstract　Thelawofchangingoveralloxygentransfercoefficient(KLa)ofapressurebiochemicalreactorwiththepressureisstudiedthroughtests.TheresultsshowthatKLaisthefunctionofthepressureinthereactor,whichapproximatelylinearlydecreaseswithanincreaseinpressure.Oxygentransferefficiency(EA)isincreasedsharplywithanincreaseinpressure.Thechangeinoxygentransferpowerefficiency(EP)isalsorelatedwiththecriticalconcentrationofDO.Atconditionsoft=25～30℃,α=0.8andβ=0.9,thecriticalvalueofDOisabout5mgL,belowwhichEPdecreaseswithanincreaseinpressure,abovewhichEPincreaseswithanincreaseinpressure.EnergyconsumptionforoxygensupplymaybeminimizedatapressurecorrespondingtomaximumEP.Itismoreeconomicandreasonabletooperatethereactoratpressureof250～600kPa.Keywords　pressurebiologicaltreatment,oxygensupply,coefficientofoveralloxygentransfer,efficiencyofoxygentransferandpowerefficiencyofoxygentransferRESEARCHONSYNTHESISANDPERFORMANCEOFANEWSCALEINHIBITORFORCYCLE-COOLINGWATERSYSTEMWuBingetal(13)………………………………………………………………Abstract　Akindofwater-solublescaleinhibitorissynthesizedbasedonmaleicandacrylicacidandbyaddingperoxideandsodiumhypophosphite.Thereactionconditionswereoptimizedasfollows:temperature=85～90℃,andreactiontime=4hr,themolarratioofmaleicacidtoacrylicacid=1∶4,theamountofperoxide=10%andtheamountofhypophosphite=20%.When15×10-6ofthepreparedpolymercompoundisusedforsimulatedcoolingwater,staticscale-inhibitingratiocanreach96.46%andstaticcorrosion-delayingratiois14.56%.Keywords　scaleinhibitorfromlaleic-acrylicacid,staticscale-inhibitingrateandstaticcorrosion-delayingrateTREATMENTOFBUTTON-PRODUCINGWASTEWATERBYCOAGULATIVESEDIMEUTATION-ANAEROBIC-AEROBICPROCESSWuDongleietal(15)………………………………………………………………Abstract　Alivingexampleoftreatingbuttonmanufacturingwastewaterwithgoagulativesedimentation-anaerobic-aerobicprocesswasintroduced.TheapplicationresultshowedthattheremovalrateofCODCrandSSwere97%and99%respectively.Theeffluentcouldmeetthenationalstandardsteadily.Keywords　buttonmanufacturingwastewater,coagulativesedimentation,anaerobicandaerobicSLUDGEBULKINGANDCONTROLINSEQUENCINGBATCHREACTORLiuDapengetal(17)……Abstract　Throughanengineeringexampleofpotatofoodprocessingwastewatertreatment,itispointedoutthatsludgebulkingcanoccurbecauseofhighersludge-loadingwhichresultsinlowdissolvedoxygenconcentrationinsequencingbatchreactor(SBR)usedtotreateasilybiodegradableanddissolvedorganicwastewater.Thecauseofsludgebulkingisexploredandthedetailedintroductiontothemeasuresofcontrellingthebulkingisalsogiven.Keywords　SBR,sludgebulking,dissolvedoxygenandcontrolEXPERIMENTALSTUDYONNITROGENREMOVALBYELECTRODE-BIOLOGYPROCESSTangBingetal(19)……………………………………………………………………………………………………………………Abstract　Inthispaper,thepossibilityofimprovingtheefficiencyofnitrogenremovalwasstudied,andcomparedthedifferenceofnitrogenremovalbetweenordinarybiologyreactorandelectrode-b