A2OMBR工艺反硝化脱氮除磷研究张捍民

48420087大连理工大学学报JournalofDalianUniversityofTechnologyVol.48,No.4July2008:1000-8608(2008)04-0490-06A2O-MBR张捍民＊,　张　杰,　肖景霓,　杨凤林(大连理工大学环境与生命学院,辽宁大连　116024):以自行设计的双反应器A2O-MBR为研究对象,对模拟生活废水的脱氮除磷进行了研究.结果表明:当N、P负荷为0.14和0.03kg·m-3·d-1时,COD、N、P去除率分别为90.5%、80.6%和67.7%;系统不必外投硝酸盐即可实现反硝化除磷,具有很强的反硝化脱氮除磷能力,反硝化聚磷菌(DPAOs)占总聚磷菌(PAO)的比例和反硝化除磷量占总除磷量的比率分别达70.00%和69.81%;污泥回流中硝酸盐量超过一定范围会发生对厌氧释磷的抑制,本系统中当进水ρ(COD)∶ρ(TP)为30∶1时,进水COD与回流污泥硝酸盐的比例应高于30∶1.采用间歇抽吸出水有助于延缓膜污染,膜出水不受污泥沉降性的影响.:膜生物反应器;反硝化除磷;脱氮除磷;膜污染:X703:A:2007-03-25;　:2008-05-19.:＊(1973-),,,,,E-mail:[e-mail]0　　(MBR)、,[1].MBR,MBR.,MBR,MBR,、.[2]MBR(SBMBR),SBMBR,,COD,,,,.,,.A2O-MBR,,MBR,,;,,、[3].A2O-MBR、,.1　1.1　试验装置(A)AO(AO),AO.1、2,.0.1m3,0.01m3,A.,,.A10min;AO,,,,.AAO10min(A※AO(RA)AO※A(R)),A,AO,.、、,,　　　　1;2;3Y-;4;5;6;7();8;9;10;11;12;13;14;15()图1　试验装置流程图Fig.1　Schematicdiagramofexperimentalprocess(25±1)℃.,0.15m2,0.1μm.,Ⅰ,37d0.14kg·m-3·d-1,60d;Ⅱ,20d.图2　试验运行方式Fig.2　Therunningmodeofexperiment1.2　接种污泥及试验水质,MLVSS/MLSS0.58.,、、、MgSO4·7H2O、CaCl2·2H2O、FeSO4·2H2O、.ρ(COD)=280～400mg/L;ρ(NH+4-N)=27～50mg/L;ρ(TP)=8～10mg/L;ρ(NO-2-N)=0.002mg/L;ρ(NO-3-N)=0.05mg/L.1.AO-MBR.表1　操作参数Tab.1　Operationparameters/L/h/d/℃/(L·h-1)R1)ARA2O-MBR181816.725±12.40--A885.025±1-0.50AO-MBR101030.025±12.400.41.0:1)RA1.3　分析方法COD、NH+4-N、NO-3-N、TP[4],,,0.45μm.YSIModel55.2　2.1　氨氮的去除3,.Ⅰ,0.08kg·m-3·d-10.14kg·m-3·d-1,,;37d,76.88%,NH+4-NNO-3-N10.16mg/L、2.11mg/L.Ⅱ,0.15m3/h0.2m3/h,3.22mg/L5.41mg/L,89.8%,NH+4-NNO-3-N4.47mg/L5.62mg/L.图3　氨氮的去除效果及出水硝酸盐含量的变化Fig.3　TheNH+4-Nremovalperformanceandeffluentnitratecontentofthesystem491　4　张捍民等:A2O-MBR工艺反硝化脱氮除磷研究,,,PHB,,.2.2　总磷的变化,,.45,,1.95mg/LNO-3-N2.34mg/L,5.92mg/L,.Ⅰ,,,3.0mg/L,,,,.45d,TP44.45mg/L,6.45mg/L,4.40mg/LNO-3-N,2.79mg/L,TP3.02mg/L.TP69.81%66.70%.,42dA,COD,,.NO-3-NCOD[5].图4　A池总磷及硝酸盐的变化Fig.4　ThechangeofTPandNO-3inReactorA图5　AO池总磷及硝酸盐的变化Fig.5　ThechangeofTPandNO-3inreactorAOⅡ,.,67d,34.07mg/L,10.13mg/L,2.68mg/L.,,[6].,COD30∶1.2.3　反硝化除磷特性分析2.3.1　释磷试验　.57d6,30min(Rspr,30)([7])29.05mg·(g·h)-1.SBMBR[2]25.84mg·(g·h)-1,.4.32mg/L,,SBMBR,.2.3.2　吸磷速率及DPAOs比例　,DPAOs[7],RDPAOs=qan/qaeDPAOsPAO.RDPAOsDPAOsPAO;qan,mg·(g·h)-1;qae,mg·(g·h)-1.7,57d、492大连理工大学学报48　6.29mg·(g·h)-18.99mg·(g·h)-1,DPAOsPAO70.00%,5,,,DPAOs.2.4　周期试验,A2O-MBR,60d,,.,AO,,.(8),A41.30mg/L,COD,89.2%,PHB,,11.11mg/L,8.64mg/L,,60min,4.33mg/L,61.02%,1mg/L,88.4%.,0.09mg/L,99.2%.,0.1mg/L,99.78%,,.图8　试验运行60d的周期试验Fig.8　Periodicexperimenton60thday2.5　污泥比好氧速率活性37d2h,(Rsou),,2.2,,DPAOsRsou,DPAOs,.2h,PHB,Rsou5.8186mg·(g·h)-1,4.0936mg·(g·h)-142.1%,Rsou[8],,.,NO-3TP493　4　张捍民等:A2O-MBR工艺反硝化脱氮除磷研究Rsou(30.8759mg·(g·h)-1),Rsou(28.7174mg·(g·h)-1).,,.表2　DPAOs污泥和普通好氧污泥的Rsou值Tab.2　TheRsouofDPAOssludgeandcommonactivesludgeDPAOsRsou/(mg·(g·h)-1)Δ/(mg·(g·h)-1)Rsou/(mg·(g·h)-1)Δ/(mg·(g·h)-1)5.8186-4.0936-NO-316.704910.88638.54854.4548NO-3+TP30.875925.057411.19737.1037TP28.717422.898910.83616.7425:1)ΔRsouRsou;2)3040mg/L2.6　膜污染情况,9、10MLVSS/MLSSSVI(ptm).,.9、10,(MLVSS/MLSS),0.7～0.8,,AO-MBR0.77,,,,0.71.,25kPa;,40d,,ptm45kPa,25kPa.[9].,.60d,AO-MBR,SVI,ptm25kPa,,,.SVI(85～106),.,.3　(1)A2O-MBRA2O,,,,N、P0.140.03kg·m-3·d-1,COD、N、P90.5%、80.6%67.7%.(2)AO-MBR,,DPAOsPAO70.00%,494大连理工大学学报48　69.81%.(3)A2O,,COD30∶1,,,.:[1]顾国维,何义亮.膜生物反应器———在污水处理中的研究和应用[M].北京:化学工业出版社,2001[2]肖景霓,张捍民,代文臣,等.序批式膜生物反应器同时脱氮除磷的比较研究[J].环境科学,2006,27(11):2233-2238[3]ADHAMS,GAGLIARDOP,BOULOSL,etal.Feasibilityofthemembranebioreactorprocessforwaterreclamation[J].WaterScienceandTechnology,2001,43(10):203-209[4]国家环境保护总局水和废水检测分析方法编委会.水和废水检测分析方法:4版[M].北京:中国环境科学出版社,2002[5]KUBAT,VANLOOSDRECHTMCM,HEIJNENJJ.PhosphorusandnitrogenremovalwithminimalCODrequirementbyintegrationofdenitrifyingdephosphatationandnitrificationinatwo-sludgesystem[J].WaterResearch,1996,30(7):1702-1710[6]金兆丰,许竟成.城市污水回用技术手册[M].北京:化学工业出版社,2004[7]KERRN-JESPERSENJP,HENZEM.Biologicalphosphorusuptakeunderanoxicandaerobiccondition[J].WaterResearch,1993,27(4):617-624[8]SCHMIDTJE,AHRINGBK.Granularsludgeformationinupflowanaerobicsludgeblanketreactors[J].BiotechnologyandBioengineering,1996,49(3):229-246[9]BAETae-hyun,HANSung-soo,TAKTae-moon.Membranesequencingbatchreactorsystemforthetreatmentofdairyindustrywastewater[J].ProcessBiochemistry,2003,39(2):221-231StudyofdenitrificationphosphorusremovalinA2O-MBRZHANG　Han-min＊,　ZHANG　Jie,　XIAO　Jing-ni,　YANG　Feng-lin(SchoolofEnvironmentalandBiologicalScienceandTechnology,DalianUniversityofTechnology,Dalian116024,China)Abstract:Simultaneousnitrogenandphosphorusremovalperformanceinsimulateddailywastewaterwasinvestigatedbytakingaself-designedA2O-MBR.Theresultsshowthat:whentheloadsofNandPare0.14and0.03kg·m-3·d-1,theremovalrateofCOD,NandPare90.5%,80.6%and67.7%,respectively.Thelaboratory-scalesystemcanobtaingooddenitrifyingphosphorousremovalabilitywithoutextranitrateaddition.Theproportionofdenitrifyingphosphateaccumulatingorganisms(DPAOs)andtherateofdenitrifyingphosphorousremovalare70.00%and69.81%,respectively.Nitrateconcentrationinreturnedsludgeshouldbelimitedtoalowrangetoavoidtherestraintofphosphorus-releaseunderanaerobicphase.TherateofinfluentCODtonitrateinreturnedsludgeshouldbehigherthan30∶1whenρ(COD)∶ρ(TP)=30∶1i