pHMLSSNO-2王 燕, 王淑莹, 孙洪伟, 张晶宇, 甘冠雄(北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京100124) : 采用UASB-SBR组合工艺处理垃圾渗滤液,在获得稳定短程生物脱氮的前提下,以SBR系统内具有良好短程脱氮特性的污泥为研究对象,重点考察了pH和污泥浓度(MLSS)对短程反硝化过程NO-2还原速率的影响。试验结果表明:当MLSS一定且初始pH值介于6~9之间时,随着pH的升高,NO-2的还原速率加快;当达到最适宜的pH后,NO-2的还原速率随pH的升高而降低。当初始pH一定且MLSS值介于1000~8000mg/L之间时,NO-2的还原速率随MLSS值的增加呈现先升高后下降的趋势。由此可知,pH和MLSS对NO-2的还原速率有较大的影响,过高或过低的pH、MLSS值均不利于NO-2还原过程的进行。试验结果显示:pH值为7~8、MLSS为5000mg/L时,NO-2的还原速率较高,最高可达0.527g/(gVSS·d)。 : SBR反应器; 短程反硝化; 垃圾渗滤液; NO-2还原速率; 污泥浓度; pH:X703 :A :1000-4602(2010)13-0025-04EffectsofpHandMLSSonNitriteReductionRateinShortcutDenitrificationWANGYan, WANGShu-ying, SUNHong-wei, ZHANGJing-yu, GANGuan-xiong(KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China) Abstract: ThecombinedprocessofUASBandSBRwasusedtotreattheactuallandfillleachate.Basedonthestableshortcutbiologicalnitrogenremoval,takingthesludgewithgoodshortcutnitrogenre-movalcharacteristicsinSBRsystem,theeffectsofpHandMLSSonnitritereductionrateinshortcutdenitrificationwasinvestigated.TheresultindicatesthatwhenMLSSisgivenandtheinitialpHis6to9,thenitritereductionrateisincreasedaspHisincreased,andisdecreasedaspHisincreasedwhentheoptimalpHisreached.WhentheinitialpHisgivenandMLSSis1000to8000mg/L,thenitritereduc-tionrateisfirstincreasedandthendecreased.Therefore,pHandMLSShavegreateffectsonnitritere-ductionrate,andtoohighortoolowpHandMLSSareallunfavorablefornitritereduction.Whentheop-timalpHandMLSSare7to8and5000mg/Lrespectively,thenitritereductionrateishigher,upto0.527g/(gVSS·d). Keywords: SBR; shortcutdenitrification; landfillleachate; nitritereductionrate; mixedliquorsuspendedsolids(MLSS); pH :(8091001); (PHR20090502)·25·第26卷 第13期2010年7月 中国给水排水CHINAWATERWASTEWATER Vol.26No.13Jul.2010 、、、,[1]。[2、3],,。,,NO-2-NN2,、[4]。(FA)、(FNA)[5~9],。,,pH(MLSS),pHMLSSNO-2。,UASB-SBR,,SBRpH,pHMLSSNO-2。1 材料与方法1.1 ,pH7.1~8.5,COD3000~5000mg/L,TN1500~2600mg/L,NH+4-N1000~2400mg/L,5000~8500mg/L。1.2 UASB-SBR,、UASB、、SBR(1)。1 UASB-SBRFig.1 FlowchartofUASB-SBRbiologicalsystem,,50L。150mm,10L。UASBSBR,3L9L。UASB,SBR,25L。UASB(30±2)℃,SBR。1.3 UASB,SBR。1.4 SBR100mL,0.45μm,105℃4h,MLSS,600℃2h,(VSS);NO-2-N[10];WTWpH,0.05mol/LNaOHHClpH。1.5 SBR,4L4pHMLSS。MLSS1000mg/L,42mLNaNO20.5mL,NO-240mg/L(,C/N5~6)。22℃,4pH,pH6、7、89。7MLSS(2000、3000、4000、5000、6000、70008000mg/L),pH、MLSSNO-2。2 结果与分析2.1 pHNO-2MLSS=3000mg/L,pH6、7、8、9NO-20.025、0.256、0.2550.187g/(gVSS·d)。pH=7~8NO-2,pH6、9101.3。pHNO-2。pH,,pH,,。·26·第26卷 第13期 中国给水排水 ~7.5[11]。pH=8NO-2,SBR,pH。,NO-2pH:y=-0.07475x2+1.16975x-4.29425。pHNO-2,pH7~8。2.2 MLSSNO-22pH=7MLSSNO-2。2 MLSSNO-2Fig.2 VariationofnitriteconcentrationwithtimeunderdifferentMLSS2,MLSS1000~5000mg/L,NO-2,5000~8000mg/L。MLSS5000mg/LNO-230min,MLSS1000mg/L,3h1mg/LNO-2,。MLSS1000、2000、3000、4000、5000、6000、7000、8000mg/L,NO-20.013、0.029、0.256、0.272、0.527、0.474、0.380、0.316g/(gVSS·d)。,,NO-2,“”。[12],,。NO-2,。,,,NO-2,“”,NO-2。“”,NO-2,:①,“”,;②,NO-2。MLSSNO-2,MLSS=5000~6000mg/L,NO-2,95%。2.3 pH、MLSS3pHMLSSNO-2。3,pH=7~8、MLSS=5000mg/L,NO-2,0.527g/(gVSS·d)。pH、MLSS,pHMLSSNO-2。3 NO-2pHMLSSFig.3 VariationofnitritereductionrateunderdifferentpHandMLSS3 结论① MLSSpH6~9,pH,NO-2。MLSS=3000mg/L,pH7~8。② pHMLSS1000~8000mg/L,NO-2。pH=7、MLSS=5000~6000mg/L,NO-2,95%。③ pH、MLSSNO-2。pH、MLSS。pH=7~8、MLSS=5000mg/L,·27·王 燕,等:pH和MLSS对短程反硝化过程NO-2还原速率的影响第26卷 第13期NO-2,0.527g/(gVSS·d)。:[1] ,.[M].:,2005.[2] ShiskowskiDM,MavinicDS.Biologicaltreatmentofahighammonialeachate:influenceofexternalcarbondur-inginitialstartup[J].WaterRes,1998,32(8):2533-2541.[3] MartienssenM,SchopsR.Biologicaltreatmentofleachatefromsolidwastelandfillsites—alterationsinthebacterialcommunityduringthedenitrificationprocess[J].WaterRes,1997,31(5):1164-1170.[4] GuoJianhua,PengYongzhen,WangShuying,etal.Ef-fectiveandrobustpartialnitrificationtonitritebyreal-timeaerationdurationcontrolinanSBRtreatingdomes-ticwastewater[J].ProcessBiochem,2009,44(9):979-985.[5] ,,,.[J].,2006,26(5):751-756.[6] PhilipsS,LaanbroekHJ,VerstraeteW.Origin,causesandeffectsofincreasednitriteconcentrationsinaquaticenvironments[J].EnvironSciBiotechnol,2002,1(2):115-141.[7] ,,,.[J].,2008,29(12):3428-3432.[8] VadiveluVM,KellurJ,YuanZG.Effectoffreeammo-niaandfreenitrousacidconcentrationontheanabolicandcatabolicprocessesofandenrichedNitrosomonasculture[J].BiotechnolBioeng,2006,95(5):830-839.[9] VadiveluVM,YuanZG,FuxC,etal.TheinhibitoryeffectsoffreenitrousacidontheenergygenerationandgrowthprocessesofanenrichedNitrobacterculture[J].EnvironSciTechnol,2006,40(14):4442-4448.[10] .(4)[M].:,2002.[11] .[M].:,2007.[12] ,.[M].:,1998.:(1986- ), , , , 。:15910776070E-mail:wangyan2008@emails.bjut.edu.cn:2010-02-10(上接第24页),0、10、50、200mL26%、40%、47%、62%,10、50、200mLSV304、3、2h。④ ,,。FeCl3,。:[1] JubanyI,BaezaJ,LafuenteJ.Model-basedstudyofni-triteaccumulationwithOURcontrolintwocontinuousni-trifyingactivatedsludgeconfigurations[J].WaterSciTechnol,2009,60(10):2685-2693.[2] BrockmannaD,MorgenrothaE.Evaluatingoperatingcon-ditionsforo