AAOMBR组合工艺强化去除氨氮及其硝化速率陈卫

第32卷第4期土木建筑与环境工程Vol.32No.42010年08月JournalofCivil,Architectural&EnvironmentalEngineeringAug.2010A/A/O-MBR陈　卫1,武　迪1,朱宁伟1,郑晓英1,李　激2,羊鹏程2(1.河海大学环境学院,南京210098;2.无锡市排水管理处,江苏无锡214011):2010-01-02:(2006BAC19B01);—(BE2008674):(1958-),,,,,(E-mail)[e-mail]。　:将PVDF帘式中空纤维膜组件与A/A/O工艺结合,构建“A/A/O-MBR”强化生物脱氮的中试系统,用于处理太湖流域城镇污水。针对组合工艺的脱氮效果,以组合工艺MBR池内活性污泥的硝化速率为研究对象,分析了溶解氧(DO)浓度、进水氨氮浓度和温度对硝化速率的影响。结果表明,组合工艺在夏季和冬季的氨氮平均去除率分别稳定为96.56%和96.68%;低温(T15℃)条件下,进水氨氮浓度对硝化速率影响不大;温度升高硝化速率加快,温度为30.5℃时组合工艺的硝化速率为11.8℃时的2.6倍;与常规工艺相比,组合工艺的硝化速率是氧化沟工艺的2.3倍。组合工艺两级硝化空间形成的较长水力停留时间和MBR内膜的截留作用补偿了低温对硝化速率的影响。:A/A/O-MBR组合工艺;低温;氨氮去除率;硝化速率:X703.1　　:A　　:1674-4764(2010)04-0090-06EnhancedAmmoniaRemovalandNitrificationRateofA/A/O-MBRCombinedProcessCHENWei1,WUDi1,ZHUNing-wei1,ZHENGXiao-ying1,LIJi2,YANGPeng-cheng2(1.CollegeofEnvironmental,HohaiUniversity,Nanjing210098,P.R.China;2.WuxiDrainageManagementOffice,Wuxi214011,Jiangsu,P.R.China)Abstract:BycombiningthemembranebioreactorofthePVDFhollowfibermembranewiththeA/A/Oprocess,apilottestsystemofA/A/O-membraneprocess(A/A/O-MBR)wasconstructedandemployedintreatingmunicipalwastewaterinTaihuLakeBasin.Accordingtothenitrogenremovalofcombinedprocess,thenitrificationrateofactivatedsludgeinMBRwasstudied.Theeffectofdissolvedoxygenconcentration,influentammonianitrogenconcentrationandtemperatureonnitrificationratewasanalyzed.Itisfoundthattheaverageremovalratesofammonianitrogenofcombinedprocessare96.56%and96.68%insummerandwinter,respectively.Influentammoniaconcentrationhaslittleeffectonnitrificationrateatlowtemperatureoflessthan15.0℃.Highertemperatureswouldspeedupthenitrificationrateandthenitrificationrateofcombinedprocessat30.5℃was2.6timesthanthatat11.8℃.Comparedwiththeconventionalprocess,nitrificationrateofcombinedprocesswas2.3timesthanthatinoxidationditch.TheenhancednitrificationoflonghydraulicretentiontimeformedbytwonitrificationphaseandtheroleofmembranefiltrationinMBRoffsettheinhibitoryeffectsoflowtemperatureonnitrificationrate.Keywords:A/A/O-MBRcombinedprocess,Lowtemperature,Ammonia-nitrogenremovalrate,Nitrificationrate　　,,《》(DB321072-2007)《》(GB18918-2002),。,(MBR)、[1]。MBRSS,,、,MBR,A/O-MBR、UCT-MBRA/A/O-MBR。,,,、[2-5],、。,[6-7],,,[8-10]。,,,,。、,、,(T15℃),,,。A/A/O-MBR,,,MBR2,,,A。。1　1.1　。A/A/O-MBR5.5m、2.2m、2.5m,2m,24m3,、、MBR3∶3∶4∶4,。,,MBR,,,。MBRPVDF,0.01μm。。A/A/O-MBRMBR。、(1),60cm,19cm,10L,(DKY-OIS)、(),7312。1-;2-T/PH;3-;4-;5-;6-;7-;8-;9-;10-。1　1.2　,25～30℃、10～18℃,15.02mg·L-1、19.02mg·L-1,COD219.0mg·L-1、258.0mg·L-1;TN24.0mg·L-128.0mg·L-1;MBRMLVSS2.00～3.0g·L-1。1.3　MLVSS、、、DO(DissolvedOxygen,)、、pH,MLVSS;;;DO、WTWDO;pHpH。1.4　MBR,、。,MBR8L,15min2L,15min2L,。,。2LpH()。DO3.0mg·L-191第4期陈　卫,等:A/A/O-MBR组合工艺强化去除氨氮及其硝化速率,15.00～27.0mg·L-1。,。DO,,MLVSS,。2　2.1　A/A/O-MBR。2,、A/A/O-MBR。,,,《》(GB18918-2002)A,96.56%96.68%。DO、、。。,。,。2　A/A/O-MBR、2.2　DO,,。1.00g4.57g(3.43g,1.12g)。DO1.20～1.50mg·L-10.20～0.40mg·L-1[11],DO。,DO,,。[12-13],DO0.76mg·L-1,,DO2.00mg·L-1,。DO3.00mg·L-1,。,4～5[14],DO4,,DO。[15],rkDO,DO1.50mg·L-12.00mg·L-1k。,DO2.00mg·L-1k,DO,k。,DO,DO。,DO。,k。(1)、(2)。r=(NH4+-N)/T(1)k=r/MLVSS(2)2.3　(T15℃),　　(T15℃),3,1。3,3　92土木建筑与环境工程　　　　　　　　　　　　　　　　第32卷。1,,1.000mg·g-1MLVSS-1·h-1。,0.08kg·m-3·d-10.40kg·m-3·d-1,31%[16]。,。,MBR,,MLSS,,,。,,,。1　(T15℃)/(mg·L-1)/(mg·L-1)T/℃r/(mg·L-1·h-1)MLVSS/(g·L-1)k/(mg·g-1MLVSS-1·h-1)a14.742.6310.51.952.3550.828b18.223.9811.62.242.4500.910c21.305.2111.82.272.4400.929d26.836.5611.22.542.4601.033(:1,r;k,。)2　,T/℃/(mg·L-1)/(mg·L-1)r/(mg·L-1·h-1)R2MLVSS/(g·L-1)k/(mg·g-1MLVSS-1·h-1)a19.620.394.243.1080.99262.3501.323b24.019.934.314.2720.98442.4301.758c30.520.784.185.7240.99142.2202.5782.4　,2,,;,。,,μArrhenius[17],10℃,μ。[17]k=μ/YNobs(YNobs,0.04～0.13mg·mg-1),kμ。12,,30.5℃11.8℃2.6,。4,,。,。MBR2,12h,。,。4　2.5　,,,3,,2.3。[19]。,,,,。93第4期陈　卫,等:A/A/O-MBR组合工艺强化去除氨氮及其硝化速率3　/(mg·L-1)/(mg·L-1)T/℃r/(mg·L-1·h-1)MLVSS/(g·L-1)k/(mg·g-1MLVSS-1·h-1)a.A/A/MBR(O)MBR20.694.9715.12.9602.2301.33b.20.934.8914.91.4162.4200.585　3　1)“A/A/O-MBR”MBRDO3.0mg·L-1,,。2),,。3),,2.3。“A/A/O-MBR”MBR2,;,,,96.68%,0.56mg·L-1。:[1]HONGSP,BAETH,TAKTM,etal.Foulingcontrolinacti-vatedsludgesubmergedhollowfibermembranebioreactors[J].Desalination,2002,143:219-228.[2],,,.A2/O-[J].,2007,23(3):22-26.　　CAOBIN,HUANGXIA,BEIZHONG-DUN,etal.PilottestonenhancedbiologicalnitrogenandphosphorusremovalbyusingA2/O-MBR[J].ChinaWater&Wastewater,2007,23(3):22-26.[3]CHANGIS,CLECHPL,JEFFERSONB,etal.Membranefoul-inginmembranebioreactorsforwastewatertreatment[J].EnvironEng,2002,128(11):1018-1029.[4]ADHAMS,GAGLIARDOP,BOULOSL,etal.Feasibilityofthemembranebioreactorprocessforwaterreclamation[J].WatSciTechnology,2001,43(10):203-209.[5]JRAJESHBANU,DOKHACUAN,LCK-TAEYEOM.NutrientremovalinanA2O-MBRreatorwithsludgereduction[J].BioresourceTechnology,2009,100:3820-3824.[6]WITTEBOLLEL,VERSTRAETEW,BOONN.Quantifyingcommunitydynamicsofnitrifiersinfunctionally[J].AppliedandEnvironmentalMicrobiology,2008,74(1):286-293.[7],.、[J].,2007,23(15):1-3.　　YANGQING,PENGYONG-ZHEN.NitrificationanddenitrificationofPilot-scalemunicipalwastewateratroom,low-temperature[J].ChinaWater&Wastewater,2007,23(15):1-3.[8]FUZHIMI,YANGFENGLIN,ANYINGYU,e