OA两级生物砂滤池的二次启动及其脱氮除碳效果李思敏

:2010-06-20:;(07276713D):(1968-),,,,。:1673-9469(2010)04-0036-04OA李思敏1,赵南南1,付民2,赵博1(1.,056038;2.,056002):以城市二级处理出水为试验原水,通过逐渐提高滤速的方式,对停止运行近5个月的OA两级生物砂滤池进行重新启动。重点研究了反应器的二次启动速度和启动后的脱氮除碳效果,以及CN比对该工艺脱氮除碳效果的影响。试验结果表明,石英砂表面的生物膜并未死亡,通水运行后能在很短的时间内恢复正常。稳定运行期间,系统对CODCr和NH4+-N的平均去除率分别为45.53%和65.50%,出水CODCr和NH4+-N的平均浓度分别为48.50mgL和4.12mgL。当CN比为5.0时,OA两级生物砂滤池具有较高的TN脱除效果,TN去除率可达到30%以上,滤池出水TN含量低于15mgL,均能达到一级A标准的要求。:OA两级生物砂滤池;二次启动;脱氮除碳;碳氮比:X552　　　　　　　　:ASecondarystart-upofOAbiologicalsandfiltersanditsremovaleffectofnitrogenandcarbonLISi-min1,ZHAONan-nan1,FUMin2,ZHAOBo1(1.CollegeofUrbanConstruction,HebeiUniversityofEngineering,HebeiHandan056038,China;2.HandanMunicipalSewageTreatmentCo.,LTD.,HebeiHandan056002,China)Abstract:Effluentofmunicipalsecondarytreatmentwaschosenasrawwatertore-startuptheOAbio-logicalsandfilterswhichstoppedrunningnearlyfivemonths,inthewayofincreasinghydraulicloadgrad-ually.Thesecondarystart-upspeed,theremovaleffectofnitrogenandcarbon,theinfluenceofCNra-tioonremovaleffectofnitrogenandcarbonweremainlystudied.Theresultsshowedthatthemembraneat-tachedonthesurfaceofquartzsandisnotdead,theOAbiologicalsandfilterscanbacktonormalruninaveryshorttime.Duringstableoperation,theaverageremovalofCODCrandNH4+-Nwere45.53%and65.50%respectively,andtheaverageconcentrationofCODCrandNH4+-Nineffluentwere48.50mgLand4.12mgLrespectively.TheremovalefficiencyofOAbiologicalsandfiltersishighfortotalnitrogenwhentheCNratiois5.0;theremovalrateoftotalnitrogenreachesabove30%,theaverageconcentrationofTNineffluentislowerthan15mgL.TheeffluentqualitymetthefirstAclassstandardof“urbansewagetreatmentplantpollutantdischargestandard”(GB18918-2002).Keywords:aerobicanoxicbiologicalsandfilters;secondarystart-up;nitrogenandcarbonremoval;CNratio　　OA,CODCrNH4+-N,。,。[1]OA,。27　4　　　　　　　　　　　　　(　　　　)　　　　　Vol.27　No.4201012　　　　　Journal　of　Hebei　University　of　Engineering(NaturalScienceEdition)　　　　　Dec.2010[2],NO3--N,。[3],AO,,。,5OA,CODCr、NH4+-N、NO3--N。11.1OA,O,A,,,,。,120mm,2000mm,300mm;,1200mm,0.6～1.2mm,K802.0;500mm,200mm、400mm、600mm、800mm、1000mm,。,。PLC。1.2,1。1.33.0mh,。10d,3.0mh,DO2.0mgL;,DO0.5～1.0mgL,CN5.0。25d,3.0mh,DO2.0mgL。,DO0.5～1.0mgL,CN,CN3.0,4.0,4.5,5.0,5.5,5d。22.1CODOACODCrNH4+-N1、2。CODCr21.12～45.73mgL,NH4+-N13.27～16.05mgL,15.8～24.3℃,DO2.0mgL,1.0mh3.0mh。12,CODCrNH4+-N,,,CODCrNH4+-N45%65%。1Tab.1RawwaterqualityandmonitoringmethodsCODCr(mg·L-1)21.12～45.73NH4+-N(mg·L-1)13.27～16.05NO3--N(mg·L-1)9.67TN(mg·L-1)20.79—DO(mg·L-1)0.5～2.5℃15.8～24.3pH6.5～7.6pH　　:NO3--N。4:OA37CODCrNH4+-N。1,CODCr6d,2,NH4+-N8d。,。NH4+-N。,20d,,,,,。2.2,。,,。,,。,,。,,,,,CODCr[4-5]。,CN5.0。OANO3--N3。3,,,,NO3--N。NO3--N。,NO3--N。3,6d,,6d,8d,NO3--N,NO3--N30%。,NO3--N,,,。3CN3.1CN,CN3.0,4.0,4.5,5.0,5.5,38　　　　　　　　(　　　　)20105d。CNTN4。4,CN3.05.0,TN10%30%,。,CN3～4,,、(、、)[6-7]。,,,,CN。CN5.0,TN。,。,CNCODCr。,OACN5.0。3.2CNOA　　CN,CNCODCr5。5,CN3.0～5.5,CODCr,OACODCr,,CODCr45%,CODCr48.5mgL。CNOA,。41)OA,,,8d。2)CN,CN5.0,,TN30%。,CODCrNH4+-N,45%65%,TN、CODCrNH4+-N《》(GB18918-2002)A。3)CN,。:[1],,,.OA[J].,2008,24(5):828-831.[2],,.[J].,2009,22(3):5-7.[3].AO[J].,2009,35(22):188-189.[4],,.[J].(),2008,25(4):45-49.[5],,.-[J].,2009,19(4):258-261.[6]AESOYA,QDEGAARDH.Denitrificationinapackedbedbiofilmreactor(biofor)-experimentswithdifferentcarbonsources[J].WaterRes,1998,32(5):1463-1470.[7],,.[J].(),2010,27(1):32-35.(　)4:OA39