二级曝气生物滤池中碳氮代谢特性的研究曾林慧

、曾林慧,　徐国勋,　张　强,　陈　超,　卜　静(上海理工大学城市建设与环境工程学院,上海200093)　　　:　采用以高分子生物载体为填料的二级曝气生物滤池处理生活污水,研究了进水有机负荷和NH3-N负荷对系统处理效果的影响。结果表明,在水温为18～25℃、pH值为5.8～7.4、气水比为3.5∶1时,对COD的去除率与进水有机负荷呈正相关,硝化率同有机负荷及NH3-N负荷呈负相关,且主要取决于前者。当有机负荷为2.75～3.90kg/(m3·d)时,对COD的去除率可高达98%;当有机负荷为0.77～1.48kg/(m3·d)时,硝化率可达93.3%～98.1%,对TN的平均去除率达39.4%。降低进水有机负荷可解除高负荷所导致的硝化抑制作用,使硝化的起始点提前,提高硝化率,显示出单独驯化的硝化滤池在去除NH3-N上的优势。硝化菌受反冲洗的影响大于异养菌,反冲洗6h后系统可基本恢复对COD和NH3-N的去除效果。　　:　二级曝气生物滤池;　碳、氮代谢特性;　有机负荷;　氨氮负荷:X703　　:C　　:1000-4602(2009)05-0066-04CarbonandNitrogenMetabolicCharacteristicsinTwo-stageBiologicalAeratedFilterZENGLin-hui,　XUGuo-xun,　ZHANGQiang,　CHENChao,　BUJing(CollegeofUrbanConstructionandEnvironmentEngineering,UniversityofShanghaiforScienceandTechnology,Shanghai200093,China)　　Abstract:　Atwo-stagebiologicalaeratedfiltersystemwithbiopolymercarrierasitsfillerwasusedtotreatdomesticsewage,andtheinfluenceofinfluentorganicloadingandammonianitrogenloadingonthesystemtreatmentefficiencywasstudied.Theresultsshowthatwhenthetemperatureis18to25℃,pHis5.8to7.4andair/waterratiois3.5∶1,thereisapositivecorrelationbetweenCODremovalrateandinfluentorganicloading,andthenitrificationratehasnegativecorrelationswithbothorganicloadingandammonianitrogenloading,theformerplaysthemainrole.CODremovalrateattains98%with2.75to3.90kgCOD/(m3·d),whilethenitrificationrateachieves93.3%to98.1%,andtheaveragere-movalrateofTNattains39.4%with0.77to1.48kgCOD/(m3·d).Nitrificationwillstartearliertoimproveitsefficiencywhentheinfluentorganicloadingreduces.Thefilterwhichisdomesticatedsepa-ratelyshowsitsadvantageinammonianitrogenremoval.Thenitrificationbacteriasuffersamoreseriousimpactfrombackwashthantheheterotrophicbacteria,whiletheremovalefficienciesofCODandammo-nianitrogencanbealmostrecoveredafter6hofbackwash.　　Keywords:　two-stagebiologicalaeratedfilter;　carbonandnitrogenmetaboliccharacteristics;　organicloading;　ammonianitrogenloading　　(BAF)2080,·66·第25卷　第5期2009年3月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vol.25No.5Mar.2009[1]。,BAF[2、3]。、,NH3-N、,、。1　试验材料和方法1.1　1。1　Fig.1　Schematicdiagramofexperimentalset-up,1.80m,10cm,20cm。(JHE),140cm。,[4],、12、5mm。1.2　MgSO4·7H2O、(NH4)2CO3、KH2PO4、、NaHCO3、FeSO4·7H2O、CaCl2、MnSO4·H2O、CuSO4·5H2O、ZnSO4·7H2O,1。1　Tab.1　QualityofsyntheticwastewaterCOD/(mg·L-1)NH3-N/(mg·L-1)TN/(mg·L-1)pH/℃88～45013.2～15217.3～1855.8～7.418～251.3　COD:;NH3-N:;NO-2-N:N-(1-)-;NO-3-N:;TN:—;pH:PHS-2C;DO:OXi315iDO。2　结果与讨论2.1　、。,3d,,,3d,3.5∶1,COD、NH3-N。20d,CODNH3-N80%70%,。,8d,2。2　Tab.2　ParametersatdifferentexperimentalstagesCOD/(kg·m-3·d-1)NH3-N/(mg·L-1)NH3-N/(kg·m-3·d-1)ab2.75～3.9012.3～18.50.11～0.1641～57.40.36～0.50cde0.77～1.4815.2～37.40.13～0.3345.7～90.50.40～0.79103～1520.90～1.332.2　COD2。2　NH3-N、CODFig.2　RemovalefficiencyofammoniaandCODunderdifferentloads2,COD,·67·曾林慧,等:二级曝气生物滤池中碳、氮代谢特性的研究第25卷　第5期CODCOD。a、b,2.75～3.90kg/(m3·d),COD,COD,COD90%,98%,COD8mg/L。c、d、e0.77～1.48kg/(m3·d),COD79%～86%,CODCOD。,17、18,COD,65.2%,,;,COD。,COD,80%,,,。2,NH3-N,,、NH3-N。2.75～3.90kg/(m3·d),NH3-N,NH3-N0.11～0.16kg/(m3·d)0.36～0.50kg/(m3·d),NH3-N76.2%～81.8%50.4%～57.6%。0.77～1.48kg/(m3·d),NH3-N,,NH3-NNH3-N,c,NH3-N93.3%,。,,NH3-NCOD,NH3-N,,98.1%。d、e,NH3-N(0.40～0.79)、(0.90～1.33)kg/(m3·d),NH3-N(87.9%～91.1%)、(86.6%～88.7%),NH3-N20mg/L。TN3。3,,TN,TNTN;TN。0.77～1.48kg/(m3·d),TN39.4%。3　TNFig.3　RemovalefficiencyofTN2.3　,0.5kg/(m3·d)、3.55kg/(m3·d)0.77kg/(m3·d),、,4。4　Fig.4　Changesoforganicmatterandnitrogenconcentrationthroughtwo-stagefilter·68·第25卷　第5期　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　～1.0m。,,,COD。,3.55kg/(m3·d),,1.2m3.96%,;0.77kg/(m3·d),0.6m5.25%、1.2m36.06%,,NH3-N。,,,,NH3-N57.61%;,90.25%。4,NH3-N,,NH3-N,NH3-N。2.4　,、,SS,,1。、,7～8min5min,16L/(m2·s),8L/(m2·s)。d(0)1、2、3、4、5hCOD、NH3-N,COD、NH3-N125、129.85mg/L。,CODNH3-N,3hCOD78.3%,;NH3-N,6h83.32%。,,。3　结论①　COD,2.75～3.90kg/(m3·d),COD98%;NH3-N,,0.77～1.48kg/(m3·d),93.3%～98.1%。,TNTN,0.77～1.48kg/(m3·d),TN39.4%。②　,,,,,NH3-N。,,NH3-N。③　CODNH3-N,3hCOD,6hNH3-N83.32%,。:[1]　RujolR,HamonM,KandelX,etal.Biofilters:Flexiblereliablebiologicalreactors[J].WaterSciTechnol,1994,20(10-11):33-38.[2]　PujolR,LemmelH,GousaillesMA.Keypointofnitrifi-cationinanupfowbiofiltrationreactor[J].WaterSciTechnol,1998,38(3):43-49.[3]　CludobaP,PujolR.Athree-stagebiofiltrationprocesss:Performancesofapilotplant[J].WaterSciTechnol,1998,38(8-9):257-265.[4]　KentTD,FitzpatrickCSB,WilliamSC.Testingofbio-logicalaeratedfilter(BAF)media[J].WaterSciTechn-ol,1996,34(3-4):363-370.:13917741410E-mail:[e-mail]:2008-08-18·69·曾林慧,等:二级曝气生物滤池中碳、氮代谢特性的研究第25卷　第5期