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,＊,,(, 100871):,(SFBC),、3.,SFBC,,CODTP50%40%,TN,20%.,,,.:(SFBC);;;;:X522 :A :0250-3301(2008)08-2227-08:2007-08-13;:2007-09-17:(863)(2005AA601010-03):(1983～),,,,E-mail:lilu1983@163.com＊,E-mail:dhwen@pku.edu.cnPilotExperimentontheTreatmentoftheRiverWastewaterbyaStep-FeedBiologicalContactProcessLILu,WENDong-hui,ZHANGHui,XIEShu-guang(CollegeofEnvironmentalScienceandEngineering,PekingUniversity,Beijing100871,China)Abstract:IntheDianchiLakewatershed,theDaqingheRiverwiththehighestloadofpollutionwaschosenasthetreatmenttarget,anewstep-feedbiologicalcontact(SFBC)processwasstudiedtotreatthewastewaterfromtheriverway.Thepilotexperimentwascarriedoutthroughawinterdryseason,aspringdryseasonandasummerrainyseason.TheresultsshowedthattheSFBCprocesswaswell-adaptedtothevariationoftheriverwastewaterqualities.Byadjustingtheprocessparametersindifferentseasons,theremovalratesofCODandTPcouldbestableatabout50%and40%respectively;however,theremovalrateofTNwasinfluencedbythewatertemperatureandDOgreatly,andkeptatabout20%whentheprocesswenttoitsstabilization.Seedingwithactivatedsludgecouldacceleratethestart-upoftheequipment,butthewholetreatmentefficiencywasnotasgoodasthatoftheequipmentwithoutseedingbutdomesticatingthemicroorganismintheriverwastewater.However,alongwiththerunningoftheSFBCprocessaswellastheimpactoftheinfluentsedimentfromtheriver,thedifferenceofthetreatmentefficienciesbetweenthetwoequipmentsofwhetherornotseedingwithactivatedsludgewoulddisappeargradually.Keywords:step-feedbiologicalcontact(SFBC)process;riverwastewater;removalrate;nitrogentransformation;theDianchiLake 、,、、,,、、,V,,[1].,.,[2,3].、,,,,.,“”.,[4～7]、[8],[9,10]、[11,12].,[13][14],.,、.,、.(step-feedbiologicaltreamment)、、、.194600m3d4,COD158mgL、NH+4-N15.7mgL、HRT4.1h,,1mgL,29820088 ENVIRONMENTALSCIENCEVol.29,No.8Aug.,2008DOI:10.13227/j.hjkx.2008.08.022,264%～68%[15～17].,(step-feedbiologicalcontact,SFBC),,.,,,、、,7.8×107m3,COD15274t、TN3792t、TP312t,24.5%、26.8%20.9%.SFBC.1 1.1 SFBC1.,,;90°; ,.2,PVC,1.9m×0.3m×0.3m,0.1425m3.2,1∶1∶1。,1∶3.,,.1.2 ,,,1100m1,850m.,,COD166.7mgL、NH+4-N31.9mgL、TP1.11mgL,《》(GB8978-1996)COD≤60mgL、NH+4-N≤15mgL、TP≤0.5mgL1.1.;2.;3.;4.;5.;6.;7.;8.;9.1 Fig.1 SchematicoftheSFBCprocess ,.2,1,2,.2.1.3 COD:;TN:-;TP:;NO-3-N:;NH+4-N:;DO、pH:MettlerToledoDOpH.2 、、2228 29,200612,、.31(2),11:00,2.3SFBC2.1 Table1 Localclimateandriverwastewaterconditionsduringtheexperimentseasons(2006-12-19～2007-01-31)(2007-03-03～2007-05-08)(2007-05-13～2007-06-14)℃0～176～2810～28,,1,,,,,,,,L·h-126.471.326.4()4∶3∶21∶1∶11∶1∶1HRTh5.425.4℃8.5～14.813.9～24.217.9～32.6DOmg·L-100.7～9.80.1～7.62 SFBCFig.2 Wastewatertemperature,DOintheSFBCprocess 2.1 SFBC,COD166.7mgL,TN34.9mgL,TP1.11mgL.,,,,,.,.,5.4h,1∶1∶1[18].23.COD22298: 2 SFBCTable2 ComparisonofthetreatmentefficiencyoftheSFBCprocessindifferentseasons(2006-12-19～2007-01-31)(2007-03-03～2007-05-08)(2007-05-13～2007-06-14)mg·L-1114.7～301.548.3～201.248.8～174.7CODmg·L-120～205.820.7～88.713.6～77.3%28.1～82.223.5～71.921.6～77.6mg·L-126.31～37.897.83～19.939.45～18.55TNmg·L-123.23～36.525.38～18.373.92～17.67%0.2～15.72.9～350.2～67.9mg·L-10.29～1.740.13～0.570.36～2.24TPmg·L-10.15～1.40.05～0.30.08～1.86%16.5～78.815.4～71.716.7～88.83 COD、TNTPFig.3 COD,TN,TPvariationandremovalratesduringthewinterdryseason2230 29151.6%,260.5%;TP43.4%;TN,14.8%,21%～36.6%,9.7%.,1,;2,,1.4 COD、TNTPFig.4 COD,TN,TPvariationandremovalratesduringthespringdryseason2.2 SFBC,,COD83.1mgL,TN13.0mgL,TP0.37mgL.HRT5.4h,,,,,.,HRT2h,4∶3∶2[18],,,,.4.,,1、2COD50%,38.5%;,COD50%,154.2%,246.4%.TN,115.5%,224.7%.TP,122318:48.6%,245.1%.,1CODTP2,TN2.5 COD、TN、TPFig.5 COD,TN,TPvariationandremovalratesduringthesummerrainyseason2.3 SFBC,,,,,,,.,,,,,,,,,,,、,.,5.4h,4∶3∶2[18].5.,,COD,78.4mgL,COD,140.7%,243.1%;2232 29COD,COD,71.9%66.5%.TN,,1、24.9%2.7%31.2%27.2%.TP,,116.7%～83.3%,53.6%;220.4%～88.8%,47.3%.,,1、2,.2.4 SFBCSFBC,6.6 Fig.6 NH+4-N,NO-3-Nvariationduringtheexperimentseasons.2SFBC,15℃,,,(6),,2TN4.8%9.7%(3).,,,(6),(6),2TN15.5%24.7%(4)31.2%27.2%(5)..2SFBCDO,,DO0mgL,DO2mgL,,(6、3).,,,,DO,0.1～9.8mgL,;DO(3),(6),,,DO1.5mgL[19],SFBC,,,,、TN(4、5).1、2,2,22338:,,;,21,21;,1、2.3 (1),SFBC,;SFBC,,,;,,.(2)SFBC、HRT、,,CODTP50%40%;DO,,TN5%,DO,,,TN20%.:[1] .2006[R].http:[2] NaimanRJ,DecampsH.Theecologyofinterfaces:riparianzones[J].AnnualReviewofEcologyandSystematics,1997,28:621-658.[3] AnbumozhiV,RadhakrishnanJ,YamajiE.Impactofriparianbufferzonesonwaterquality[J].EcologicalEngineering,2005,24(5):517～523.[4] deCeballosB,OliveiraH,MeiraC,etal.Riverwaterqualityimprovementbynaturalandconstructedwetlandsystemsinthetropicalsemi-aridregionofNortheasternBrazil[J].WaterScienceandTechnology,2001,44(11-12):599-605.[5] JingSR,LinYF,LeeDY,etal.Nutrientremovalfrompollutedriverwaterbyusingconstructedwetlands[J].BioresourceTechnology,2001,76(2):131-135.[6] RuanX,XueY,WuJ,etal.Treatmentofpollutedriverwaterusingpilot-scaleconstructedwetlands[J].BulletinofEnvironmentalContaminationandToxicology,2006,76:90-97.[7] ,,,.[J].,2006,27(9):1760-1764.[8] ,,,.[J].,2005,14(6):822-826.[9]