MBR中磁种好氧颗粒污泥的培养及对膜污染的影响

MBR刘爱萍1,陈中颖1,李开明1,郭森2(1.环境保护部华南环境科学研究所,广东广州510655;2.环境保护部环境评估中心,北京100012):以人工合成模拟废水为处理对象,在膜生物反应器(MBR)中培养磁种好氧颗粒污泥,并考察了其对膜污染的影响结果表明,由絮状活性污泥培养磁种好氧颗粒污泥,开始污泥中大量繁殖丝状菌,然后丝状菌缠绕成细小的颗粒,最后慢慢形成颗粒污泥,其外表光滑,近似呈圆球形或椭球状培养成熟的磁种好氧颗粒污泥的粒径为0.47~4.1mm,平均为1.7mm;SVI70mL/g,远低于普通活性污泥的(100~150mL/g);沉降速度随粒径的增加而增大,范围为30~91m/h,而普通活性污泥的只有8~10m/h同时,比较了絮状污泥MBR和磁种好氧颗粒污泥MBR在运行过程中膜通量的变化趋势,结果表明:磁种好氧颗粒污泥MBR的膜通量下降速度低于普通絮状活性污泥MBR的,这是磁种好氧颗粒污泥和反应器的流态共同作用的结果:膜生物反应器;磁种;好氧颗粒污泥;膜污染:X703:A:1000-4602(2010)19-0001-05:(2007B030103015);(206030201)CultivationofAerobicGranularSludgewithMagneticSeedandItsEffectonMembraneFoulinginMBRLIUAiping1,CHENZhongying1,LIKaiming1,GUOSen2(1.SouthChinaInstituteofEnvironmentalSciences,MEP,Guangzhou510655,China;2.AppraisalCenterforEnvironmentalEngineering,MEP,Beijing100012,China)Abstract:AerobicgranularsludgewithmagneticseedwascultivatedinMBRtotreatartificiallysyntheticwastewater,anditseffectonmembranefoulingwasinvestigated.Theresultsindicatethatduringtheprocessofcultivatingaerobicgranularsludgewithmagneticseedbyflocculentactivatedsludge,atthebeginning,aconsiderableamountoffilamentousbacteriaispropagated,thenthefilamentousbacteriaaggregateintoverysmallgranules,atlas,tthematuredgranularsludgeisgraduallyformedwithsmoothsurfaceandapproximatelysphericalorspheroidalshape.Thesizeofmaturedaerobicgranularsludgewithmagneticseedis0.47to4.1mm,andtheaveragevalueis1.7mm.TheSVIvalueislessthan70mL/g,whichisfarlessthanthatofconventionalactivatedsludge(100to150mL/g).Thesettlingvelocityisincreasedwiththeincreaseofgranulesize,witharangeof30to91m/h,whichisfarmorethanthatofconventionalactivatedsludge(8to10m/h).ThevariationtrendofmembranefluxesinMBRsfilledwithflocculentactivatedsludgeandaerobicgranularsludgewithmagneticseedindicatesthatthedeclinerate1第26卷第19期2010年10月中国给水排水CHINAWATER&WASTEWATERVo.l26No.19Oct.2010ofmembranefluxinMBRfilledwithaerobicgranularsludgewithmagneticseedislessthanthatinMBRfilledwithconventionalactivatedsludge,thisresultsfromthecombinedactionofaerobicgranularsludgewithmagneticseedandtheflowstateofthereactor.Keywords:MBR;magneticseed;aerobicgranularsludge;membranefouling,,[1~3]SBR[45],MBR,MBR,[67],MBR,,,MBRMBR,,MBR1材料与方法111,,,44L,17L,27L0.2m2/,100L/(m2d),0.1m31Fig.1Schematicdiagramofexperimentalapparatus:,,,,,,8min2min,12,11Tab.1Compositionofsyntheticdomesticwastewater/(mgL-1)144NaHCO3/(mgL-1)9.6KH2PO4/(mgL-1)5.6NH4Cl/(mgL-1)26.4MnSO4H2O/(mgL-1)0.2H3BO3/(gL-1)0.15CoCl26H2O/(gL-1)0.15CuSO45H2O/(gL-1)0.03FeCl36H2O/(gL-1)1.5CaCl2/(mgL-1)7.2MgSO47H2O/(mgL-1)9.6FeSO47H2O/(mgL-1)0.1335/(mgL-1)32ZnSO47H2O/(gL-1)0.12KI/(gL-1)0.03MnCl2H2O/(gL-1)0.12Na2MO7O242H2O/(gL-1)0.06,MLVSS/MLSS0.896,SVI239mL/g,,13CODMBRMLSS,[8]:100mL,500r/min10min,,;:[9];:50~100,1L,,2结果与讨论21HRTCOD,2g/L31(1~8d)(2第26卷第19期中国给水排水),COD350~550mg/L,20h,COD0.6kg/(m3d)pH7.5,pH,COD50%pH6.5,NaHCO3pH8.5,2(9~32d)(),(COD500~800mg/L)COD1.5kg/(m3d),16hpH5.8,,,COD2d,,20NaHCO3COD1NaHCO3,28pH6.9,COD280~490mg/L,51%~72%(0.3~0.5mm),27,,1~3mm;,,EPS1~5mm3(33~50d)(),COD800~1000mg/L,8h,COD4.5kg/(m3d),NaHCO3COD=0.31NaHCO3,,,COD90%,,,,,,22221,1.009~1.053g/cm3,1.047g/cm3;96.8%~98.2%,(99%)(IC),,200r/min5min,,IC94.7%222,,0.47~4.1mm,1.7mm2,1mm68.7%2Fig.2Sizedistributionofaerobicgranularsludgewithmagneticseed223(SVI)33SVIFig.3VariationofSVIofsludgeduringstableoperationofreactor3,SVI70mL/g,(100~150mL/g)3刘爱萍,等:MBR中磁种好氧颗粒污泥的培养及对膜污染的影响第26卷第19期,4,,30~91m/h,(8~10m/h)4Fig.4Settlingvelocityofdifferentsizesofaerobicgranularsludgewithmagneticseed23231,MBRMBR,55MBRFig.5VariationofmembranefluxesinMBRswithtwokindsofsludge5,MBR5d,10L/(m2h)56L/(m2h);,133.8L/(m2h)MBR5d,59.3L/(m2h);4d,96.3L/(m2h);,136.1L/(m2h),MBR1.6,MBRMBR,,232,,22Tab.2ConcentrationofsludgeinmembranezoneandguidezoneinreactorgL-1/d246810121416185.76.06.26.76.97.37.57.57.67.17.48.08.18.28.48.68.89.02,,1.1~1.8g/L,,,1/3(1~2L/h);,,,:,,,,3结论,,,,,(下转第9页)4第26卷第19期中国给水排水(3HB)accumulation[J].BioresourTechno,l2008,99(7):2410-2418.[5]RyuHD,KimD,LimHE,etal.Nitrogenremovalfromlowcarbontonitrogenwastewaterinfourstagebiologicalaeratedfiltersystem[J].ProcessBiochem,2008,43(7):729-735.[6],,.[J].,2008,24(5):18-26.[7],,,.[J].,2006,26(3):293-297.[8],,,.DO[J].,2003,169(1):8-10.[9],.ERPSBR[J].,2005,31(1):57-61.[10],,.A/ODO[J].,2007,23(21):1-5.[11]FillosJ,RamalingamK,ThomatosS.FullscaleevaluationofstepfeedBNRprocessataNewYorkCitywaterpollutioncontrolplant[A].Proceedingsof75thAnnualTechnicalExhibitionandConference[C].Illinois,USA:McCormickPlace,2002.[12],,./SBR[J].,2006,22(17):34-37.:(1964-),,,,E-mail:[e-mail]:2010-05-07(上接第4页)0.47~4.1mm,1.7mmSVI70mL/g,(100~150mL/g);,30~91m/h,(8~10m/h)MBRMBR,:[1],.[J].,2007,32(11):93-97.[2]WangQiang,DuGuocheng,ChenJian.Aerobicgranularsludgecultivatedundertheselectivepressureasadrivingforce[J].ProcessBiochem,2004,39(5):557-563.[3]ArrojoB,MosqueraCorralA,GarridoJM,etal.Aerobicgranulationwithindustrialwastewaterinsequencingbatchreactors[J].WaterRes,2004,38(14-15):3389-3399.[4]BeunJJ,vanLoosdrechtMCM,HeijnenJJ.Aer