不同生物接触氧化方法对藻类的去除效果比较及其途径分析

:025322468(2001)20320277205:X703:A1,2(11,,100871;21,100084):3,.:()46mPh,,70%;YDT()(),,6012%5116%1,,70%.:;;.Effectsonthealgaeremovalbydifferentbiologicalcontactoxidationpro2cessesandtheirmechanismsWUWeizhong1,WANGZhansheng2(11CenterforEnvironmentalScience,PekingUniversity,Beijing100871;21DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084)Abstract:Effectsonthealgaeremovalbythreedifferentcontactoxidizationsintheeutrophicrawwaterandtheirmechanismswerestudied1Theresultshaveshowedthat:biofilter(aeratedsubmergedbiologicalfilter)gainsasteadyremovalrateforthegrossalgae,about70%aver2agely;forbiofilter(air2liftbiologicalcontactoxidizationreactor)equippedwiththeelasticYDTasthemediaandbiofilter(directmi2croporeaeratedbiologicalreactor),theaveragealgaeremovalratesare6012%and5116%respectivelywithinthebeginningstageoftheex2periment,butgraduallyrisetomorethan70%averagelyduringthelaterstageoftheexperimentwiththeincreaseofbiofilmdepth1Thesub2stantialalgaeremovalwaysarebio2flocculation,adsorption,detachmentandsedimentationbythebiofilm.Keywords:thetypesofmedia;operationcondition;wayforalgaeremoval:2000210220;:2000212209:(962909203):(1963-),,.20,.[1-5].,,.,[6-9].3,,,,.21320015ACTASCIENTIAECIRCUMSTANTIAEVol.21,No.3May,200111111,1,[10].1Fig.1Simulatedexperimentalset2upofthreetypicalcontactoxidationprocesses1Table1Theoperationalparametersofoxidationtanks,m3Ph,m3P(m2h)31061048017112:13104150191160181112:1410610018112017112:1112,,.22112(1997810).,,.2Table2Statisticsofpurificationefficiencyofalgaeremoval,PL,PL,%12011203544417497671812011203544948612460121201120354655401435116(1997819984),131831.34,,I,46mPh0175110,70%,,(8,8mPh),(79),.(15),3715%5214%,,(69),70%.872213Table3Thealgaeremovalbyunderdifferentconditions(),m3Ph(),m3Ph,PL,PL,%13101:141014465631424150175:1610152606133160175:141813142684412018:1515199666553161:1418281697563161:1418217497973101:1410423648586101:181018657709412018:15152274977154Table4Thealgaeremovalbyunderdifferentconditions(),m3Ph(),m3Ph,PL,PL,%1510019:11401947152510017:112079552143510017:111469137154510017:111498642115610112:1112187100461864101:10182065376127411017:101828160771685101:112065075139610017:11123385185212,.27.2TDYFig.2TheattachedalgaeonTDYmediaof3Fig.3TheattachedalgaeonTDYmediaof4TDYFig.4TheattachedalgaeonTDYmediaof9723:5Fig.5Attachedthestraightchaindiatonondetachedbiofilm6Fig.6Thepredominationalgaeseparatedfrombiofilm7Fig.7Theprotozoaclingingonbiofilm,(SS).213.,1,,,.34TDY.,,.5.6,.7.5740.213:,,,,[6].,.,.5.,,1:1115:1,7713%8617%;,.,,,,.,,,.,;,,;,3.,,,(),08221,.,;YDT.(100m),YDT(150m214mm)[6].(1000)(23),.5Table5Thealgaeremovalbybiologicalcontactoxidationprocessesunderdifferentconditions(),PL,%0181192516851673158214111803577912771373151151106378801286177619,..YDT,[6],.,,.,YDT,,,,,.,,,.:[1][M]1:11999[2]1,,[J]1,1993,62(6):216[3],1[J]1,1986,55(4):3239[4],1[J]1,1989,9(1):8693[5]Kyeong2HoLim,Hang2sikshin.Operatingcharacteristicsofaeratedsubmergedbiofilmreactorsfordrinkingwatertreatment[J]1WatSciTech,1997,36(12):101[6],1[M]1:.1999[7],1[J]1,1997,20(1):4349[8],1[J]1,1992,8(6):47[9],1[J]1,1988,29(4):1320[10],1[J]1,2000,20(Suppl):44501823: