搜索
TN。TN。、、。2。11.125.05m、0.8m×1.0m。1.25m3～5mm、0.8～1.2mm、。。2500mm1400mm1。1。1.2COD、pHTN、NO3--N、NO2--N[1]。22.120105272010612。21.2m3·h-11.5m·h-1。64～220.8mg·L-1。1。6。2.1.1TNCODTN1,211.2430022.243051。2TN90%。62TN75%4～5。HRT2TN。。HRTX703.1A1000-3770(2011)09-0073-0042010-12-071965－18905550033E-mailzhengjun6642@163.com1Fig.1Flowchartofthecomparisonexperiment37920119TECHNOLOGYOFWATERTREATMENTVol.37No.9Sep.,201173DOI:10.16796/j.cnki.1000-3770.2011.09.018COD。TN2。68mCOD/mTN))31～41。22TN50%68812TN90%。TN。2TN90%20℃、。NO3-NO2-[2]。TN。。2.1.23。3。68TNTNNO3--NNO2--N0。68NO2--N。NO2--NTN。2.21.2m3·h-1、1.5m·h-1、23～27℃31、41、51、61TNNO2--N45。4、5TN。31TNNO2--N4151TN55.4%62.5%50.2%67.3%。NO3--NNO2--NDO20～247.27～7.547.6～23.113.96～28.8110.99～23.840.025～0.116～81Tab.1Theinfluentcharacteristicsduringbiofilmgrowing/℃pHCOD/mg·L-1ρ/mg·L-1TN0510152025303502040608010006-1206-0906-1006-1106-0506-0606-0706-0806-0306-0406-01 (TN)/mg L 06-02 /%22TNFig.2TheTNremovalefficiencyofthetwobiofiltersduringbiofilmgrowing051015202506-1206-0906-1006-1106-0506-0606-0706-0806-0306-0406-01TNNO -NNO -N/mg L 06-023a3b3Fig.3Thenitrogenconcentrationintheeffluentofthebiofilter051015202506-1206-0906-1006-1106-0506-0606-0706-0806-0306-0406-01 /mg L 06-0242TNFig.4TheTNremovalrateindifferentC/Nofthetwobiofilters02468101214161820020406080100 TN/% 3797461TN78.6%75.3%NO2--N1mg·L-1。1.5m·h-161TN75%。BODCOD。、[3]。。TN。2.3HRTTN5.5～6、23～27℃HRT24、19、15minTN6。6HRT2TN。HRT24min2TN75%HRT15minTN60%。DO。2.4215。220.4m。212。11～2min。12～18L·m-2·s-15～6L·m-2·s-13min5min10min[4]。《》[5]。1m52NO2--NFig.5TheNO2--NconcentrationindifferentC/Nofthetwobiofilters024681012141618200.00.51.01.52.02.53.03.54.0(NO -N)/mg L 230.10.50.91.30.140.140.160.170.150.202.452.940.150.243.704.900.180.294.906.860.200.335.889.802Tab.7Theheadlosschangingwithtimealongmediaheight/m1/kPa62HRTTNFig.6TheTNremovalrateindifferentHRTofthetwobiofilters02468101214020406080100TN /% 75RESEARCHONNITROGENREMOVALBYDENITRIFICATIONBIOFILTERSWITHMEDIAOFDIFFERENTCHARACTERISTICSZhengJun1,2,SunNan1(1.SchoolofArchitecturalEngineering,AnhuiUniversityofTechnology,Maanshan243002,China;2.HuaqiEnvironmentProtectionScienceandTechnologyDevelopmentCo.Ltd,Maanshan243051,China)Abstract:WiththeeffluentfromthesecondarytreamentofHuaqiWWTPinYixingcity,apilotscalecomparisonexperimentbetweentwodown-flowbiofiltersparticularlytakingceramsiteandquartzsandasmediawascarriedout.Thestart-upperiod,thecarbonresourcedosage,HRTandtheresistanceweremainlyinvestigated.Theresultsshowedthatthebiofilmcangrowmatureintwoweeksusingdesignflowspeedtocultivateconstantly.TheTNremovalratecanreach90%whenthecarbonresourcedosagewassufficient,andtheremovaleffectofthebiofilterwithceramsitewasalittlebetterthanthatwithquartzsandduringtheperiodanditwilldrawnearwhenthetreatmentwassteady.WhentheCOD/ρ(TN)wasmorethan6,theTNremovalrateofthetwobiofilterscanbothreach75%above,andtheNO2-concerntrationintheeffluentwaslow;ButwhentheCOD/ρ(TN)was4～5,theNO2-concerntrationwillaccumulate.WiththereductionofHRT,theTNremovalrateandtheoperationperiodofthetwobiofiltersbothdropped.Thequartzsandbiofilterneededbackwashmorefrequentlyduetoitsshortoperationperiodwhichwashalftotheceramsitebiofilter.Keywords:ceramsite;quartzsand;down-flowdenitrificationbiofilter;biofilmformation;carbonresourcedosage;HRT;variationoftheresistance。TN。2。1.2m3·h-110～15h4～9h。。1.2m3·h-12.0m3·h-1DO[6]。3～6h7～12h。1。。。3、2TN90%。、2。64～5DODO。HRTDO。。。[1]《》.[M].4.:,2002.[2].[J].,1995(2):1-7.[3].[J].,1994,15(2):29-32.[4],.[M].:,2005.[5]CECS2652009[S].[6],,.[J].,2004,26(6):433-436.37976