李志荣, 陈庆选, 王欣泽, 何圣兵, 张振家(上海交通大学环境科学与工程学院,上海200240) : 以固定化包埋硝化菌颗粒作为流化床的载体,以PVC弹性填料作为固定床的载体,使硝化菌分别以包埋和生物膜的形式与载体结合,通过试验对比了流化床和固定床去除水中氨氮的效果。结果表明,在相同条件下,流化床的硝化效率高于固定床的;两反应器内均存在亚硝酸盐氮积累现象,且流化床的积累浓度高于固定床的;COD及氨氮负荷的短期冲击对两反应器的硝化效果几乎不会产生影响;流化床中的包埋固定化硝化菌具有更强的抗温度变化能力;在反应器连续运行条件下,流化床和固定床对氨氮的去除率分别为96%和80%。 : 流化床; 固定床; 固定化包埋硝化菌; 生物膜; 硝化速率:X703 :C :1000-4602(2007)19-0052-04ComparisonofAmmoniaNitrogenRemovalRatebetweenFluidizedBedReactorwithEmbeddedNitrobacteriaandFixedBedReactorwithBio-contractOxidationProcessLIZhi-rong, CHENQing-xuan, WANGXin-ze, HESheng-bing, ZHANGZhen-jia(SchoolofEnvironmentalScienceandEngineering,ShanghaiJiaotongUniversity,Shanghai200240,China) Abstract: Takingimmobilizedembeddednitrobacteriapelletascarrierinfluidizedbedreactor,andPVCelasticfillerascarrierinfixedbedreactor,nitrobacteriawererespectivelyimmobilizedonen-capsulatedbeadsandbiofilminthebothreactors.Ammonianitrogenremovaleffectinthebothreactorswascompared.Theresultsshowthatthenitrificationefficiencyinfluidizedbedishigherthanthatinfixedbedunderthesamecondition.Nitriteaccumulationtakesplaceinthebothreactorsandaccumula-tionstrengthinfluidizedbedishigherthanthatinfixedbed.Short-termimpactofCODandammoniani-trogenloadhardlyaffectsthenitrificationeffectinthebothreactors.Furthermore,theimmobilizedem-beddednitrobacteriainfluidizedbedhavestrongerabilityagainsttemperaturechange.Duringthecontin-uousrunning,theammonianitrogenremovalratesinfluidizedbedandfixedbedare96%and80%re-spectively. Keywords: fluidizedbed; fixedbed; immobilizedembeddednitrobacteria; biofilm; nitri-ficationrate NO-x-N,。,,BOD,。。,[1],,。·52·第23卷 第19期2007年10月 中国给水排水CHINAWATERWASTEWATER Vol.23No.19Oct.20071 材料与方法1.1 ,3mm×3mm×3mm,,,1.02g/cm3,。PVC,A/O。,NH4Cl、Na2HPO4、NaHCO3,。1.2 1。1 Fig.1 Schematicdiagramofexperimentalsetup,,18L。,1#,10%;2#,。,,。,4~5mg/L,(27±1)℃。2 结果与讨论2.1 2.1.1 pH2。,,、。2,NH+4-N40mg/L,90%NH+4-N80mg/L,NH+4-N,,。,,,。2 Fig.2 Acclimationofembeddednitrobacteria。2,pH,pH。,pH,NH+4-N,pH,,,,。2.1.2 A/O,MLSS2000mg/L。40mg/L,HRT8h,1d,。,,,。,80mg/L,HRT8h,1,,,93%,。2.2 2.2.1 32℃、NH+4-N250mg/L,·53·李志荣,等:包埋硝化菌流化床与接触氧化固定床除氨氮效果对比第23卷 第19期,3。3 Fig.3 Ammonia,nitriteandnitrateprofilesinbothfluidizedbedandfixedbedreactors3,39mgN/(L·h),[25mgN/(L·h)]。,,,。,,,。3,,,,。。,,0.1~1.0mg/L,10~40mg/L。250mg/L,20~30mg/L。,、,。,。:,,(0.042mgcell/mgN)(0.142mgcell/mgN)[2],,,。,,,,。(),pH,。,,,DO,,。NO-3-NNON2O[3]。2.2.2 15COD、。1 CODTab.1 AmmoniaremovalratesunderdifferentconditionsofCODandammonialoadingrates12345COD/(mgCOD·L-1·h-1)1218243136/(mgNH3-N·L-1·h-1)2222413539COD∶/(gCOD·g-1NH3-N)0.550.820.590.890.921#/%93927785792#/%8181657468 ,,。2.2.3 ,30℃,15℃,30℃。8~·54·第23卷 第19期 中国给水排水 ℃,4。4 Fig.4 Temperatureeffectonnitrificationrate4,,1#2#。28℃8℃,1#40mgN/(L·h)18mgN/(L·h),55%;2#31mgN/(L·h)8mgN/(L·h),74.2%。28℃32℃,1#40mgN/(L·h)39mgN/(L·h),2.5%;2#31mgN/(L·h)25mgN/(L·h),19.4%。1#2#,。,,。2.2.4 ,。5,、。5 、Fig.5 Differentammoniaconcentrationsininfluentandeffluent,330mg/L,(27±1)℃,10.5h,4~5mg/L。5,1#2#。1#96%,NH+4-N15mg/L,;2#80%,,,,1#。3 结论① 32℃、NH+4-N250mg/L,39mgN/(L·h),PVC25mgN/(L·h),。② ,,,,。。③ COD;。④ 330mg/L、(27±1)℃、10.5h、4~5mg/L,96%80%。。:[1] ,,.[J].,2006,22(3):51-54.[2] RostronWM,StuckeyDC,YoungAA.Nitrificationofhighstrengthammoniawastewaters:Comparativestudyofimmobilizationmedia[J].WaterRes,2001,35(5):1169-1178.[3] ,,,.[J].,2003,23(11):53-56.:(021)26537278E-mail:lizr0210@sina.com.cn:2007-04-30·55·李志荣,等:包埋硝化菌流化床与接触氧化固定床除氨氮效果对比第23卷 第19期