氨氮冲击负荷对硝化过程的短期影响彭赵旭

彭赵旭1,　彭永臻1,2,　桂丽娟1,　刘旭亮1,　王然登1(1.哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090;2.北京工业大学环境与能源工程学院,北京100124)　　　:　为了考察氨氮冲击负荷对硝化过程的短期影响,采用SBR反应器研究了不同进水氨氮浓度下,系统硝化过程的特点以及活性污泥耗氧速率的变化。结果表明,在好氧时间不变的前提下,根据进水氨氮浓度相应地调高曝气量并不能有效消除氨氮冲击负荷对系统脱氮的影响,但DO的高低可以影响氧在水中的传质效率和微生物的硝化活性。综合考虑以上两个因素,调控好氧段的DO在2.5mg/L左右可以在不浪费能量的情况下最大限度地提高对氨氮的去除率。在短期的氨氮冲击负荷下,活性污泥的组分变化不大,对氨氮去除率的提高主要是通过增加活性污泥的硝化速率来实现的。氨氮冲击负荷对系统的释磷和吸磷过程都会产生负面影响,造成系统除磷效果的恶化。　　:　SBR反应器;　硝化;　氨氮冲击负荷;　溶解氧;　耗氧速率:X703　　:A　　:1000-4602(2010)11-0009-04　　:(2006BAC19B03);　(QAK200802)Short-termInfluenceofAmmoniaNitrogenImpactLoadonNitrificationProcessPENGZhao-xu1,　PENGYong-zhen1,2,　GUILi-juan1,　LIUXu-liang1,　WANGRan-deng1(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.CollegeofEnvironmentalandEnergyEngineering,BeijingInstituteofTechnology,Beijing100124,China)　　Abstract:　Inordertoinvestigatetheshort-terminfluenceofammonianitrogenimpactloadonthenitrificationprocess,alab-scalesequencingbatchreactor(SBR)wasusedtostudythecharacteristicsofthenitrificationprocessandthevariationofactivatedsludgeoxygenuptakerate(OUR)underdifferentinfluentammonianitrogenconcentrations.Theresultsshowthatwhenaerobicphasetimeisconstant,ad-justingtheaerationrateaccordingtotheinfluentammonianitrogenconcentrationcannoteffectivelyelimi-natetheinfluenceofammonianitrogenimpactloadonthenitrificationprocess.However,DOlevelcandeterminebothoxygentransferefficiencyinwaterandmicrobialnitrificationactivity.Comprehensivelyan-alyzingthetwofactorsabove,controllingtheDOconcentrationintheaerobicphaseataround2.5mg/Lcanimproveammonianitrogenremovalefficiencybythegreatestamountwithoutwastingenergy.Thecompositionofactivatedsludgechangeslittlewithshort-termammonianitrogenimpactload,andthein-creaseofammonianitrogenremovalrateismainlyduetotheincreaseofsludgenitrificationrate.Theam-monianitrogenimpactloadhasanegativeimpactonbothphosphorusreleaseanduptakeprocesses,resul-tingindeteriorationofphosphorusremovalefficiency.·9·第26卷　第11期2010年6月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vol.26No.11Jun.2010　　Keywords:　SBR;　nitrification;　ammonianitrogenimpactload;　dissolvedoxygen;　oxygenuptakerate　　、,、[1]。、,。,,。1　材料与方法1.1　,,1,0.3mL/L[2]。COD、NH+4-N、PO3-4-P、(300～330)、(43～129)、(8～9)、(400～450)mg/L。1　Tab.1　Compositionofsyntheticwastewaterg·L-1　CH3COONa0.42NH4Cl0.17～0.5KH2PO40.04NaHCO30.4MgSO40.08CaCl20.041.2　1。1　SBRFig.1　SchematicdiagramofSBRequipmentSBR,700mm,200mm,12L。3L,0.25,10cm,。,。,。:(0.5h,)、(2h)、(1h)、。100mL,MLSS2200～2400mg/L,SRT12.5d,HRT10h。1.3　COD、NH+4-N、NO-2-N、NO-3-N、PO3-4-P、SV、SVI、MLSSMLVSS[3];(SOUR)Joanna[4];DO、pH、ORP。,0.45μm4℃,3h。1.4　A2/O,,SVI150mL/g,30,。2。2　Tab.2　Operationmodeindifferentexperimentalphases/(mg·L-1)/(L·h-1)/4360306560/903/9861203108160312920032　结果与讨论2.1　30,NH+4-N43mg/L、60L/h,SBR,NH+4-N4.0mg/L。31,NH+4-N65mg/L,33NH+4-N11.21mg/L。3490L/h,,36NH+4-N19.70mg/L。,·10·第26卷　第11期　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　。NH+4-N,,(2)。2　Fig.2　Nitrogenremovalperformanceduringexperimentalperiod3,2(65mg/L90L/h),0.0025、0.0054、0.0058、0.00330.0045mgNH+4-N/(mgMLSS·h),。3　Fig.3　VariationsofNH+4-Nindifferentexperimentalphases,,。NH+4-N,NH+4-N43、65、86、108、129mg/L,1mgNH+4-N1.03、1.19、1.13、1.351.36L,(3),。NH+4-N,DO。,DO,。,NH+4-N,1mg。DO2.67mg/L,。DO,,DO。DO,,。3　Tab.3　Variationsofonlineparametersduringaerobicphaseunderdifferentexperimentalconditions/(mg·L-1)/LDO/(mg·L-1)pH431.030～0.740.507.50～7.867.74651.190～3.131.597.56～7.947.73861.130～4.652.677.46～8.097.731081.350～4.133.127.49～8.187.691291.360～3.923.247.35～8.247.652.2　,pH。NH+4-N,pH,0.36、0.38、0.63、0.690.89,pH。,,。SRT12.5d,4d,。。,(AOB),(NOB)。4。NH+4-NDO,AOB,。,NOB。,AOBNOB,3。AOBNOB,,·11·彭赵旭,等:氨氮冲击负荷对硝化过程的短期影响第26卷　第11期。4　Fig.4　Specificoxygenuptakerate(SOUR)ofactivatedsludgeindifferentexperimentalphases2.3　5。5　Fig.5　Phosphorusremovalperformanceunderdifferentexperimentalconditions5,,。()[5],,。,:①NH+4-N,NO-2-N(NO-3-N),,,PHB,。②NH+4-N,NO-2-N。NO-2-N,Jens[6]NO-2-N5mg/L。NO-2-N5～10mg/L,。③NH+4-N,NH+4-N,,。3　结论①　,。②　,DO2.5mg/L。③　,。④　,。:[1]　,,,.[J].,2009,25(17):14-19.[2]　TsunedaS,OhnoT,SoejimaK,etal.Simultaneousnitro-genandphosphorusremovalusingdenitrifyingphosphate-accumulatingorganismsinasequencingbatchreactor[J].BiochemEngJ,2006,27(3):191-196.[3]　.(4)[M].:,2002.[4]　JoannaSG,KristG,CarlD,etal.Nitrificationmonitoringinactivatedsludgebyoxygenuptakerate(OUR)meas-urement[J].WaterRes,1996,30(5):1228-1236.[5]　MinoT,vanLoosdrechtMCM,HeijnenJJ.Microbiologyandbiochemistryoftheenhancedbiologicalphosphorusremovalprocess[J].WaterRes,1998,32(11):3193-3207.[6]　MeinholdJ,ArnoldE,IsaacsS.Effectofnitriteonanoxicphosphateuptakeinbiologicalphosphorusremovalactiva-tedsludge[J].WaterRes,1999,33(8):1871-1883.:(1983-　),　,　,　,　。:13654584183E-mail:[e-mail]:2009-12-11·12·第26卷　第11期　　　　　　　　　　　　　　中国给水排水