ASPDM复合混凝剂对冬季太湖原水除藻效果研究

ASPPDM,*,,,(,210094):(PDM)(AS)ASPPDM,.,ASPDM(20B1~5B1)PDM(0155~3199dLPg),.,ASASPPDM(0155P20B1~3199P5B1)2NTU,(Al2O3)4124mgPL3196~1187mgPL,83100%87152%~90193%;4124mgPL,83100%88129%~97166%,2100NTU1176~0143NTU.4150mgPL,ASPPDM(1153P10B1)AS;ASPPDM(3199P5B1)ASASPPDM(0155P20B1)ASPPDM(1153P10B1).,ASPPDMAS,AS,,.,,.:(PDM);(AS);;;:X703.5:A:0250-3301(2009)04-1023-06:2008-04-18;:2008-06-20:(BS2007121);/0(2003BA327C):(1968~),,,,E-mail:[e-mail]*,E-mail:[e-mail]-RemovalEffectofASPPDMCompositeCoagulantstoWinterTaihuLakeRawWaterZHAOXiao-lei,ZHANGYue-jun,LIXiao-xiao,LIUCheng,ZHULing-ling(SchoolofChemicalEngineering,NanjingUniversityofScience&Technology,Nanjing210094,China)Abstract:TheseriesofstableASPPDMcompositecoagulantspreparedbypolydimethyldiallylammoniumchloride(PDM)andaluminiumsulphate(AS)wereusedtoresearchthealgae-removaleffecttowinterTaihuLakerawwater.Theeffectsofdosageofcompositecoagulants,compositemassratios(20B1-5B1)ofASandPDM,intrinsicviscosityvalues(0155-3199dLPg)ofPDMonalgae-removalrateswerestudiedthroughcoagulationandalgae-removalexperiments.Thefeasibilityofusingcompositecoagulantstosubstituteprechlorinationprocesswasanalysed.Theresultsshowthatwhenresidualturbidityof2NTUtowateraftercoagulationandsedimentisrequiredbywaterplant,thedosage(basedonAl2O3)ofAS,ASPPDM(0155P20B1-3199P5B1)compositecoagulantsare4124mgPL,3196-1187mgPL,andthealgae-removalratesare83100%,87152%-90193%respectively.Whendosagetorawwaterare4124mgPL,thealgae-removalratesofAS,ASPPDM(0155P20B1-3199P5B1)compositecoagulantsare83100%,88129%-97166%,andtheresidualturbiditiesare2100NTU,1176-0143NTUrespectively.Whendosagetochlorine-addedwaterare4150mgPL,thetreatmenteffectofASPPDM(1153P10B1)compositecoagulanttorawwaterisbetterthanthatofAStochlorine-addedwater,andthetreatmenteffectofASPPDM(3199P5B1)compositecoagulanttorawwaterisbetterthanthatofAS,ASPPDM(0155P20B1)andASPPDM(1153P10B1)compositecoagulantstochlorine-addedwater.SousingASPPDMcompositecoagulantscanenhanceevidentlythetreatmenteffectofAStowinterTaihuLakerawwater.ComparedwithusingASsolely,thedosageofASincompositecoagulantsaresavedwhentheresidualturbiditiesarerequiredinsamelevel,andthetreatmenteffectofASisenhancedwhenthedosageofASincompositecoagulantsaresameasthatofusingASsolely.Moreover,usingcompositecoagulantscanreplacethepartchlorine-addedfunctiononincreasingcoagulationandalgae-removalinprechlorinationprocessandprofitablyincreasessafetyofdrinkingwaterquality.Keywords:polydimethyldiallylammoniumchloride(PDM);aluminiumsulphate(AS);compositecoagulant;algae-removal;winterTaihuLakerawwater,.[1],,,,(AS).,30420094ENVIRONMENTALSCIENCEVol.30,No.4Apr.,2009,AS[2],.,,[3].(dimethyldiallylammoniumchloride,DM)(PDM),,[4,5].,ASPDM.ASPDM,[6~9],,PDM,[10].[11],,,.PDMASASPPDM,,ASPDMPDM,AS,,.,,,,,,.11.1:;XSP-8C:;TA6-2:;QZ201:.AS:,X(Al2O3)=1518%;PDM:4(G),G0155115321473199dLPg.AS,ASPPDMX(Al2O3),m(Al2O3)Bm(PDM)20B110B15B1,3,.,ASPPDM(PDMGP),ASPPDM(0155P20B1)~ASPPDM(3199P5B1)12.1.2,.5~7e,24~26NTU,pH=710,2105@104PmL,(Oocystis)(Chlorella)(Scenedesmus)(Chlorophyta)(Cyclotella)(Melosira)(Bacillariophyta),80%,(Cryptomonas)(Merismopedia)(Microcystis)20%.(),5~7e,25~27NTU,pH=618,1182@104PmL,1137mgPL,2h.1.3(1)()[2NTUAS,,,:300rPmin215min,100rPmin3min,30rPmin3min,30min.(2)1000mL,(300rPmin)15s,.(3)011mL011mL,,;50mL,.=-@100%.2,ASASPPDM(0155P20B1)~ASPPDM(3199P5B1),1~4.,,ASASPPDM(0155P20B1)ASPPDM(1153P10B1)ASPPDM(3199P1024301ASPPDM(0.55dLPg)Fig.1EffectsofdosageofASPPDM(0.55dLPg)onthealgae-removalratesandresidualturbiditiestorawwater2ASPPDM(1.53dLPg)Fig.2EffectsofdosageofASPPDM(1.53dLPg)onthealgae-removalratesandresidualturbiditiestorawwater5B1),56.2.1ASASPPDM1~4,AS,510mgPL,AS,.,,,,,.3ASPPDM(2.47dLPg)Fig.3EffectsofdosageofASPPDM(2.47dLPg)onthealgae-removalratesandresidualturbiditiestorawwater4ASPPDM(3.99dLPg)Fig.4EffectsofdosageofASPPDM(3.99dLPg)onthealgae-removalratesandresidualturbiditiestorawwater,,2~3NTU[2NTU.,1~42NTU,;AS,AS(4124mgPL),,1.1,2NTU,ASASPPDM(0155P20B1)~ASPPDM(3199P5B1)83100%87152%~90193%,4124mgPL3196~1187mgPL,AS2616%~4617%,10254:ASPPDM5Fig.5Effectsofdosageofagentsonthealgae-removalratestorawwaterandchlorine-addedwater6Fig.6Effectsofdosageofagentsontheresidualturbiditiestorawwaterandchlorine-addedwater1ASASPPDMTable1ContrastoftreatmenteffectofAS,ASPPDMcompositecoagulantsASASPPDM(GP)0155P20B10155P10B10155P5B11153P20B11153P10B11153P5B12147P20B12147P10B12147P5B13199P20B13199P10B13199P5B1Pmg#L-141243196310021203173219421003144217811943136216311872NTUP%831008715287159891108812987186891268815088107891308817188129901934124mg#L-1P%83100881299118496103901549217696143911039219797106911859413897166PNTU2100117611200166115311140164113401850152111901810143616%~5519%;4124mgPL,83100%88129%~97166%,2100NTU1176~0143NTU,AS3111%~8612%,1210%~7815%.2.21~41,ASPDM(PDM)PDM,,.,,AS,,AS,[12,13].PDM,AS,,[14,15].,,[16].AS,,Al13.AS,,[17,18].PDM,AS,,AS[19].,PDM,,.PDM,,,[20],,.,ASPDM,PDM.,PDM,,PDM[21],,,.,4124mgPL,ASPPDM(0155P10B1)ASPPDM(3199P20B1)10263091184%91185%,1120NTU1119NTU.,PDM50%,,.3[11],.ASPPDMAS,,,.3.156,AS,.1A