处理涤纶仿真丝绸印染废水的膨胀颗粒污泥床的启动官宝红

32320055　　　　　()JournalofZhejiangUniversity(ScienceEdition):2004-07-07.:(1968—),,,,.官宝红,曾爱斌,徐根良,谭天恩(,310027)　:采用膨胀颗粒污泥床(EGSB)处理涤纶仿真丝绸印染废水,通过污泥负荷和水力负荷的递增来启动反应器,从活性污泥性状和反应器性能两方面考察启动过程.活性污泥依次经历絮状、膨胀、细粒化和成熟颗粒四个阶段,反应器性能与此相应变化,有机物去除率和产气率逐渐提高且趋于稳定.结果表明,EGSB处理涤纶仿真丝绸印染废水的启动过程用了50d左右,启动后形成的颗粒污泥床层占反应器有效容积的25%和污泥量的65%左右,COD去除率为57%～64%,产气率为0.12～0.17m3·(kgCOD)-1.污泥的分化与颗粒化、稳定的有机物去除率与产气率是反应器完成启动的标志.　　:膨胀颗粒污泥床;反应器启动;印染废水:X703.1;X788　　　　:A　　　:1008-9497(2005)03-304-05GUANBao-hong,ZENGAi-bin,XUGen-liang,TANTian-en(DepartmentofEnvironmentalEngineering,ZhejiangUniversity,Hangzhou310027,China)Start-upofexpendedgranularsludgebedreactorstart-upforteryleneartificialsilkprintinganddyeingwastewatertreatment.JournalofZhejiangUniversity(ScienceEdition),2005,32(3):304～308Abstract:Expendedgranularsludgebed(EGSB)reactorwasusedtotreatteryleneartificialsilkprintinganddyeingwastewaterinalab-scale.Thecharacterofactivatedsludgeandperformanceofthereactorwereappliedtoassessthereactorstart-up,whichwasinitiatedwhensludgeloadandhydraulicloadwereincreasedstepbystep.Beforethestart-upwasfinished,activatedsludgewasdevelopedfromflocculentsludgetobulkingsludge,granulesludgeandmaturegranularstage.Thegranularsludgebedwasinchargeof65%oftotalsludgemassinthereactor,whereasoccupyingonly25%ofthereactorvolumeafterreactorstart-up.Correspondingly,theefficiencyoforganicremovalandproductionrateofbiogasincreasedgraduallyandbecomemorestable.TheresultsshowedthattheefficiencyofCODremovalincreasedto57%-64%,pHstabilizedinarangeof7.99～8.04,andproductionrateofbiogaswasrelativelyhighandstable.About50dayswerespentforEGSBreactorstart-up.GranulatedSludge,relativelyhighefficiencyofCODremovalandstableproductionrateofbiogasindicatedthesuccessofEGSBreactorstart-up.Keywords:expendedgranularsludgebed;reactorstart-up;printinganddyeingwastewater　　,[1,2],,,,,[3～5],,,,,[6].,、,、,,(Expendedgranularsludgebed,EGSB)[7].,EGSB[7],,[8].,[9,10].2～6,[11].EGSB,、,.,EGSB.1　1.1　,,,.,(TerephthalicAcid,TA),,,.,1.,、.表1　涤纶仿真丝绸印染废水水质Table1　QualityofteryleneartificialsilkprintinganddyeingwastewaterIndexespHCOD/mg·L-1BOD/mg·L-1TA/mg·L-1COL/unitSS/mg·L-1Range8.24～12.78780～3116325～1436286～1279250～60050～1630Average-1780703710-2161.2　1.,pHEGSB,EGSB,.1　EGSBFig.1　Schematicdiagramoftheexperimentalset-up1-wastewaterreservoir;2-peristalticpump;3-neutralizationreactor;4-rotatespeedcontroller;5-diluteacidtank;6-EGSBreactor;7-temperaturecontroller;8-biogascollector;9-storagevessel;10-recyclepump;11-flowmeterEGSB[12,13]2.2,,:(1),;(2),.EGSB,1.5m,h100,9L.:(1),,2.0L;(2),、、,60°,;(3),7.0L.、;,,;,;,.2　EGSBFig.2　StructurefoEGSBreactorLeft:Generalstyle　Right:Styleadoptedintheexperiment1-influent;2-granularsludgebed;3-suspendedsludgezone;4-gas-liquid-sludgeseparator;5-settlingcompartment;6-recyclepump;7-bio-gasoutlet;8-effluent1.3　EGSB,[14];,、、[14,15].,:(1)、.(2)COD∶N∶P=200∶5∶1N、P,.305　3,:　　(3),.(4)Fe、Ca、Al、Co、Ni、,.2,.EGSB,,2.表2　启动期与运行期反应器主要工艺条件Table2　SignificantparametersforEGSBreactorstart-upandoperationStageHRT/dT/℃pHInfluentCOD/mg·L-1Hydraulicload/m3·m-3.d-1Up-flowvelocity/m·h-1Start-up2～4326.3～7.81000～30000.002～440～2.0Operation0.83～5.0336.0～9.0800～310022～1091.0～5.02　2.1　.,,,.,,,,,.30d60d,3.3　EGSB　Fig.3　Sludgevariationalongaxisamidstreactorstart-upMLSS:□30d;▲60d;SVI:■30d;60d30d,0.1mMLSS14.84g·L-1,SVI66L·g-1;0.4m～1.0m(),MLSS10.80～8.48g·L-1,SVI90～109L·g-1,2.32g·L-1,3.86g·L-1·m-1.,,.60,0.1mMLSS42.75g·L-1,SVI23L·g-1.0.4mMLSS19.89g·L-1,SVI43.3L·g-1;1.0m()MLSS4.58g·L-1,15.31g·L-1,25.51g·L-1·m-1.,,、.、MLSS2.16g·L-14.58g·L-1,;SS0.33g·L-1,85%.25%,65%.30%.,5%,,.,、.,.30d60d,,,4.30d,COL(ZCOL)4　EGSBFig.4　CODandCOLvariationalongaxisamidstreactorstart-upCOD:30d;▲60d;COL:O30d;●60dCOD(ZCOD)60%23.6%;60d,ZCOLZCOD75.0%57.1%.60d,48.2%COD(306()32　0～0.4m),3020%COD.,、,CODCOL,,.30d60d,,,.2.2　,,,,.,,,,.,,,;.40d,(1mm),;,,,,,,.,,60d,10%,,,,,.EGSB,5,(Ⅰ)、(Ⅱ)、(Ⅲ)(Ⅳ),、、,[14],,.5　EGSBFig.5　Sketchofactivatedsludgegranulating0.2～2.5mm,1mm,、,,,;,.2.3　,EGSB6(10).6　EGSBFig.6　CurvesofpH,VgandZCODwithtimeduringEGSBreactorstart-up■pH;▲ZCOD;ΔVg10d28d,;15d19d,(Vg,1kgCOD)0.12～0.18m3·(kgCOD)-1,ZCODVg,,ZCODVg.28d,;30d45d,pH7.45～8.05,ZCOD36%～49%,pHZCOD;0.015～0.20m3·(kgCOD)-1,.46d,pH7.99～8.04,ZCOD,57%～64%;Vg,0.11～0.19m3·(kgCOD)-1.,,,45d,.50d,ZCODVg,60%0.12～0.17m3·(kgCOD)-1,,.,COD,[16].3　　EGSB,,、、,307　3,:,.,,50d;,COD60%,0.12～0.17m3·(kgCOD)-1.、.:BOD—(BOD5),mg·L-1COD—(CODCr),mg·L-1COL—,HRT—,dMLSS—,g·L-1SS—,mg·L-1SVI—,L·g-1Vg—,Nm3·(kgCOD)-1T—,℃TA—ZCOD—COD,%ZCOL—COL,%(References):[1]　LETTINGAG,VANNELSONAFM,HOBMASW,etal.Useoftheupflowsludgeblanket(USB)reactorconceptforbiologicalwastewatertreatment,especiallyforanaerobictreatment[J].BiotechnologyandBioengineering,1980,22:699-734.[2]　HULSHOFFPLW,deZEEUWWJ,VELZEBOERCTM,etal.GranulationinUASB-reactors[J].WaterScienceandTechnology,1983,15:291-304.[3]　NEILLCO,HAWKESFR,HAWKESDL,etal.Anaerobic-aerobicbiotreatmentofsimulatedtextileeffluentcontainingvariedratiosofstarchandazedye[J].WaterResearch,2000,34(8):2355-2361.[4]　SOPAC,MUNSINT,THONGCHAIP.Anaerobicdecolourizationofreactivedyebatheffluent