sequencing batch airlift reactor

Ngày tải lên: 27/06/2014, 12:20

... Demand- nhu cầu oxy sinh hóa COD: Chemical Oxygen Demand- nhu cầu oxy hóa học SBR: Sequencing Batch Reactor- bể sục khí hoạt động từng mẻ EM: effective microorganism, vi sinh vật hữu hiệu ... MicroActive trong xử lý nước rỉ rác dựa trên mô hình Aerotank hoạt động gián đoạn từng mẻ- Sequencing Batch Reactor (SBR).” 1.2. Mục đích Đánh giá hiệu quả xử lý của chế phẩm Sanjiban MicroActive ... MicroActive đối với nước rỉ rác dựa trên mô hình Aeroten hoạt động gián đoạn từng mẻ- Sequencing Batch Reactor (SBR). Đề tài được tiến hành trong 4 tháng, từ tháng 4 đến tháng 7 năm 2005. Phương...

Ngày tải lên: 16/11/2012, 16:11

... nitrifying granulation in sequencing batch reactors. Appl Microbiol Biotechnol 59: 332–337. Tay,J.H.,Pan,S.,He,Y.X.,andTay,S.T.L.2004.Effectoforganicloadingrateonaerobic granulation. I. Reactor performance. J ... degrading sequencing batch reactor. Environ Sci Technol 39: 5774–5780. Tijhuis, L., Hijman, B., Van Loosdrecht, M. C. M., and Heijnen, J. J. (1996) Inuence of detachment, substrate loading and reactor ... wastewater treatment using the UASB reactor under a wide range of temperature conditions. Biotechnol Genet Eng Rev 2:253–284. Liu,Q.S.2003.Aerobicgranulationinsequencingbatchreactor.Ph.D.thesis,Nanyang Technological...

Ngày tải lên: 18/06/2014, 16:20

... 206–215. Kwok,W.K.,Picioreanu,C.,Ong,S.L.,vanLoosdrecht,M.C.M.,Ng,W.J.,andHeijnen,J.J. 1998.Inuenceofbiomassproductionanddetachmentforcesonbiolmstructuresina biolm airlift suspension reactor. Biotechnol Bioeng 58: 400–407. Liu,Q.S.2003.Aerobicgranulationinsequencingbatchreactor.Ph.D.Thesis,Nanyang Technology University, ... ( C b )tosubstrateloadingrate(L s )andbiolm densityobtainedatdifferentcarrierconcentrationsandorganicloadingratesina biolmairliftsuspensionreactor(Kwoketal.1998).Obviously,inthebiolmairlift suspension reactor, detachment force is mainly due to particle-to-particle collision, whichisproportionaltothereactor’scarrierconcentration( C b ). It ... aerobic sludge blanket reactor. J Appl Microbiol 91: 168–175. Tay,J.H.,Liu,Q.S.,andLiu,Y.2004.Theeffectofupowairvelocityonthestructure ofaerobicgranulescultivatedinasequencingbatchreactor. Water Sci...

Ngày tải lên: 18/06/2014, 16:20

... sequencing batch reactors. Appl Microbiol Biotechnol 59: 332–337. Wang,F.,Yang,F.L.,Zhang,X.W.,Liu,Y.H.,Zhang,H.M.,andZhou,J.2005.Effectsof cycletimeonpropertiesofaerobicgranulesinsequencingbatchairliftreactors. World ... in upow anaerobic sludge blanket(UASB)reactors. Biotechnol Bioeng 49: 229–246. Shizas, L. and Bagley, D. M. 2002. Improving anaerobic sequencing batch reactor perfor - mance by modifying operational ... 49 3.1 INTRODUCTION Itappearsfromtheprecedingchaptersthatanumberofoperatingparametersofa sequencing batch reactor (SBR) can inuence aerobic granulation. This chapter looks intoanotherSBRoperatingparameter,cycletimeanditseffectonaerobicgranula- tion,aswellasonthecharacteristicsofaerobicgranules.Cycletimeisassociated withthewashoutfrequencyofSBR,whichcanberegardedasakindofhydraulic selection...

Ngày tải lên: 18/06/2014, 16:20

... a shortsettlingtimeof4to5minutestoeffectivelyselectforparticleswithasettling velocitylargerthan10mh –1 in a sequencing batch airlift reactor (SBAR). During theformationperiodofaerobicgranules,amixtureofgranules,laments,andocs presented in the reactor, while selection of ... GRANULES Qin,Liu,andTay(2004a)investigatedtheeffectofsettlingtimeonaerobicgranu- lationinfourcolumnreactors,namelyR1,R2,R3,andR4,eachwithaworking volume of 2.5 liters, which were operated in sequencing batch mode (gure 4.1). R1 toR4wererunatsettlingtimesof20,15,10,and5minutes,respectively,whilethe other ... UASB reactors was more hydrophobic than the nongranular sludge washed out (Mahoney et al. 1987). It seems that microbial associationhastoadaptitssurfacepropertiestoresistbeingwashedoutfromthe reactors...

Ngày tải lên: 18/06/2014, 16:20

... operation strategy for rapid and stable aerobic granulation in both small- and large-scale sequencing batch reactors (SBRs). This 53671_C005.indd 69 10/29/07 7:15:18 AM © 2008 by Taylor & Francis ... 6. REFERENCES Arrojo,B.,Mosquera-Corral,A.,Garrido,J.M.,andMendez,R.2004.Aerobicgranulation with industrial wastewater in sequencing batch reactors. Water Res 38: 3389–3399. Giokas, D. L., Daigger, G. T., von Sperling, M., Kim, ... 3821–3836. Kim,S.M.,Kim,S.H.,Choi,H.C.,andKim,I.S.2004.Enhancedaerobicoc-likegranula - tionandnitrogenremovalinasequencingbatchreactorbyselectionofsettlingvelocity. Water Sci Technol 50: 157162. Pereboom,J.H.F.1997.Strengthcharacterisationofmicrobialgranules. Water...

Ngày tải lên: 18/06/2014, 16:20

... 285–293. Qin,L.,Liu,Y.,andTay,J.H.2004a.Selectionpressureisadrivingforceofaerobicgranula - tion in sequencing batch reactors. Process Biochem 39: 579–584. Qin,L.,Liu,Y.,andTay,J.H.2004b.Effectofsettlingtimeonaerobicgranulationin sequencing batch reactor. Biochem Eng J ... 976–981. Lin,Y.M.,Liu,Y.,andTay,J.H.2003.Developmentandcharacteristicsofphosphorus- accumulating microbial granules in sequencing batch reactors. Appl Microbiol Biotechnol 62: 430–435. Liu,Q.S.2003.Aerobicgranulationinsequencingbatchreactor.Ph.D.thesis,Nanyang Technological ... granules from upow anaerobic sludge blanket reactors. Water Res 24: 14731477. Li,Y.2007.Metabolicbehaviorsofaerobicgranulesdevelopedinsequencingbatchreactor. Ph.D. thesis, Nanyang Technological...

Ngày tải lên: 18/06/2014, 16:20

... anaerobic sludge blanket (UASB) reactor. Enzyme Microb Technol 29: 417–427. Su,K.Z.andYu,H.Q.2005.Gasholdupandoxygentransferinanaerobicgranule-based sequencing batch reactor. Biochem Eng J 25: 201–207. Su,K.Z.andYu,H.Q.2006.Ageneralizedmodelforaerobicgranule-basedsequencing batch ... Appl Microbiol Biotechnol 67: 484–488. Lubken,M.W.M.,Schwarzenbeck,N.,andWilderer,P.A.2004.Sequencingbatchreactor technologies. In Proceedings of SBR3 Conference, February 22–26, 2004, Queensland, Australia. Mayhew,M.andStephenson,T.1997.Lowbiomassyieldactivatedsludge:Areview. Environ ... reactor. Biochem Eng J 25: 201–207. Su,K.Z.andYu,H.Q.2006.Ageneralizedmodelforaerobicgranule-basedsequencing batch reactor. I. Model development. Environ Sci Technol 40: 4703–4708. Tay,J.H.,Liu,Q.S.,andLiu,Y.2001.Microscopicobservationofaerobicgranulationin sequential...

Ngày tải lên: 18/06/2014, 16:20

... J., Heijnen, J. J., and van Loosdrecht, M. C. M. 2001. N removal in a granular sludge sequencing batch airlift reactor. Biotechnol Bioeng 75: 82–92. Beun, J. J., Hendriks, A., van Loosdrecht, M. ... been dedicated to the effect of various operating parameters on aerobic granulation in sequencing batch reactors (SBRs) (chapters 1 to7).However,verylimitedinformationiscurrentlyavailableaboutthediffusion behaviorsofsubstancesinsideaerobicgranules.Tayetal.(2002)foundthatamodel dye ... proles was also ignored.Beunetal.(1999)concludedthatoxygenpenetrationdepthinasequential batch airlift reactor was smaller than the acetate penetration depth. However, this point would be valid...

Ngày tải lên: 18/06/2014, 16:20

... P. 2005. Physical and chemical characteristics of granular activated sludge from a sequencing batch airlift reactor. Process Biochem 40: 645–650. Zita, A. and Hermansson, M. 1997. Effects of ... 149–157. Qin,L.,Liu,Y.,andTay,J.H.2004.Selectionpressureisadrivingforceofaerobicgranula- tion in sequencing batch reactors. Process Biochem 39: 579–584. Quarmby,J.andForster,C.F.1995.AnexaminationofthestructureofUASBgranules. Water ... Re etal.2000;Kosetal.2003;Liuetal.2004b).Thischapterlooksattheroleofcell surfacehydrophobicityintheformationofaerobicgranularsludgeinasequencing batch reactor (SBR). 9.2 CELL SURFACE HYDROPHOBICITY 9.2.1 WHAT IS HYDROPHOBICITY? Hydrophobicity...

Ngày tải lên: 18/06/2014, 16:20

... parameters, including reactor type, substrate composition, substrate loading rate, hydraulic retention time, hydro - dynamic shear force, settling time in sequencing batch reactors (SBRs), feast-famine regimeninSBRs,culturetemperature,etc.,maystimulatebacteriatosecretemore EPS.ThecompositionofEPSisalsorelatedtothecharacteristicsofthefeedwaste - water,forexampleEPSinanaerobicgranulesgrownonprotein-richwastewaterhad highproteinandDNAlevels,whereashighpolysaccharidescontentwasfoundin anaerobicgranulesfedbyothertypesoforganicwastewaters(BatstoneandKeller 2001).Inaddition,thedeciencyofnitrogenwasfoundtofavortheproductionof EPS, ... (2005) studied the physical and chemical characteristics of aerobic granular sludge from a sequencing batch airlift reactor, and they found that the contents of proteins and carbohydrateinEPSdecreasedfrom126.6and15.3mgg –1 volatile ... al. (2006) reported that the main component of EPS in aerobic granular biomass in a sequencing batch biolter reactor was made of proteins, and protein- richEPSwouldimprovethestabilityofgranularbiomassstructure.Asthemain componentofproteinsisaminoacids,whichoftencarrynegativecharges,theywill contribute...

Ngày tải lên: 18/06/2014, 16:20

Ngày tải lên: 18/06/2014, 16:20

... 462–466. Wang,Z.,Liu,L.,Yao,J.,andCai,W.2006.Effectsofextracellularpolymericsubstanceson aerobic granulation in sequencing batch reactors. Chemosphere 63: 1728–1735. Zhang,X.Q.andBishop,P.L.2003.Biodegradabilityofbiolmextracellularpolymeric substances. Chemosphere ... the biodegradation of aerobic granule-associated EPS, fresh aerobic granules taken from a sequencing batch reactor (SBR), without pretreatment, were subjectedtoaerobicstarvationwithoutadditionofanexternalcarbonsourcefor 20 ... extracted EPS in terms of polysaccharides (PS) and proteins (PN) observed in the course of the batch culture ofprestarvedaerobicgranules.ArapidbiodegradationofbothPSandPNwas observedintherst10hoursofthecultureuntilastationaryphasewasachieved.It canbeseenthatnearly50%ofPSwasutilizedbyitsownproducersastheexternal carbon...

Ngày tải lên: 18/06/2014, 16:20

... microbial aggregation during UASB reactor start-up. Water Sci Technol 19: 249–260. Qin,L.,Liu,Y.,andTay,J.H.2004.Effectofsettlingtimeonaerobicgranulationina sequencing batch reactor. Biochem Eng J 21: ... acido- genicbiolms(HuangandPinder1995;Yu,Tay,andFang2001).Jiangetal.(2003) studied the effect of calcium on aerobic granulation in sequencing batch reactors (SBRs).Forthispurpose,twoSBRswereoperatedattherespectiveCa 2+ concentra- tionsofzeroand100mgL –1 .Itwasfoundthataerobicgranuleswereformedinboth SBRs,andgranulesizeswerestabilizedataround2mmand2.8mminthecalcium- freeandcalcium-addedSBRs,respectively,after2monthsofoperation(gure13.1). These ... conversion rate of a granule V Volume of the reactor v all Substrate conversion rate of all granules X Biomass concentration m Numberofaerobicgranulesinareactor REFERENCES Batstone, D. J., Landelli,...

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Ngày tải lên: 18/06/2014, 16:20

... tubular reactors but whose validity for batch reactors was also proved. The criterion is discussed here with reference to Fig. 4.8, where the temperature–concentration profiles in a batch reactor ... model-based control of nonchain reactions in a cooled batch reactor. 2.6 Measuring the Reactor Status The modeling approach to the batch reactor presented in the previous sections of this chapter ... chemical reactors, which are simplified models of real reactors very useful as a first approach to this very complex matter. The Batch Reactor (BR) is singled out among the other ideal reactors...

Ngày tải lên: 01/04/2014, 10:59