ASPDM对冬季预加氯太湖水的除浊效果研究李潇潇

AS/PDM李潇潇,　张跃军,　赵晓蕾,　朱玲玲,　苏　林(南京理工大学化工学院,江苏南京210094)　　　:　用不同特征粘度的聚二甲基二烯丙基氯化铵(PDM)与硫酸铝(AS)制得稳定的复合混凝剂,对冬季预加氯太湖水进行强化混凝除浊试验。通过混凝烧杯试验,考察了AS/PDM复合配比值、PDM特征粘度对除浊效果的影响。结果表明,要达到该水厂现有沉淀池出水余浊标准,用AS/PDM复合混凝剂比单独投加AS时的效果好,且AS/PDM复合配比值越低,PDM特征粘度越高,复合混凝剂的除浊效果越好,所需药剂量也越少。　　:　太湖水;　预加氯;　硫酸铝;　聚二甲基二烯丙基氯化铵;　除浊:TU991.22　　:C　　:1000-4602(2008)07-0096-04　　:“”(2003BA327C);　(04d251016)TurbidityRemovalfromPrechlorinatedTaihuLakeRawWaterinWinterbyCompositeCoagulantsofAluminiumSulfateandPolydimethyldiallylammoniumChlorideLIXiao-xiao,　ZHANGYue-jun,　ZHAOXiao-lei,　ZHULing-ling,　SULin(SchoolofChemicalEngineering,NanjingUniviversityofScienceandTechnology,Nanjing210094,China)　　Abstract:　AseriesofstablecompositecoagulantswerepreparedusingAluminiumSulfate(AS)andPolydimethyldiallylammoniumChloride(PDM)withdifferentintrinsicviscosity.Theenhancedcoag-ulationandturbidityremovalfromprechlorinatedTaihuLakerawwaterinwinterwastestedusingthecompositecoagulants.TheinfluencesofthecompositeratiosofAStoPDMandtheintrinsicviscosityofPDMontheturbidityremovalefficiencywereinvestigatedbyjartests.Theresultsshowthatformeetingtheresidualturbiditystandardofthetreatedwaterfromthesedimentationtankofthewaterworks,theco-agulationandturbidityremovalefficiencybythecompositecoagulantsisbetterthanthatbysingleaddi-tionofAS.WhentheratioofAStoPDMislower,theintrinsicviscosityofPDMishigher,theturbidityremovalefficiencyisbetter,andthedosagerequiredisless.　　Keywords:　TaihuLakewater;　prechlorination;　aluminiumsulfate;　polydimethyldiallylam-moniumchloride;　turbidityremoval　　,,,[1]。,[2],,,。(AS)。AS,,·96·第24卷　第7期2008年4月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vol.24No.7Apr.2008,[3],,。[4、5]。(PDM),、、,[6、7]。,PDM。,PDM、、,,。PDMAS,,,,。1　试验材料与方法1.1　:QZ201;TA6-Ⅱ。:AS,Al2O315.8%,;PDM,0.55、1.53、2.47dL/g,。:AS,(5∶1)、(10∶1)、(20∶1)AS/PDMPDMAS,。,。,1。1　Tab.1　QualityofTaihuLakerawwater/NTU/℃/(mg·L-1)/(·L-1)29～325～71.066.7×1061.2　1000mL。300r/min15s,2min(100r/min)3min,(30r/min)3min,30min2cm。,,,。2　结果与讨论2.1　0.55、1.53、2.47dL/gPDMAS,(5∶1)、(10∶1)、(20∶1)AS/PDM,,1。2NTU2。1　Fig.1　Turbidityremovaleffectbydifferentcompositecoagulants·97·李潇潇,等:AS/PDM对冬季预加氯太湖水的除浊效果研究第24卷　第7期2　2NTUTab.2　Coagulantdosagesforresidualturbidityof2NTU　AS/(mg·L-1)AS/%AS5.45AS∶PDM(PDM0.55dL/g)20∶13.6533.0310∶13.2839.825∶12.5553.21AS∶PDM(PDM1.53dL/g)20∶13.6632.8410∶13.2540.375∶12.4854.50AS∶PDM(PDM2.47dL/g)20∶13.4835.9510∶12.8946.975∶12.3956.15　　1,AS/PDM,,AS。2,2NTU,AS5.45mg/L,ASAS。PDMASAS,,AS,AS/PDM,。,AS,AS、、,、、[8],,AS。PDM,,ASAS,;PDM、、,。AS,[9]。,PDM,PDM,,,。2.2　PDM2,10∶1,PDM0.55、1.53、2.47dL/g,AS3.28、3.25、2.89mg/L。,PDM,,,PDM,,,。PDM,,[10～13],。PDM,PDM,,。2.3　2～3NTU,。,,,1NTU。1,,,2NTU1NTU,,1NTU3。3　1NTUTab.3　Coagulantdosagesforresidualturbidityof1NTUmg·L-1　ASAS∶PDM(PDM0.55dL/g)AS∶PDM(PDM1.53dL/g)AS∶PDM(PDM2.47dL/g)20∶110∶15∶120∶110∶15∶120∶110∶15∶1AS65.995.654.715.685.414.595.264.914.11　　3,1NTU,AS6mg/L,、,,。4.11～5.99mg/L1NTU,,,·98·第24卷　第7期　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　。,,。3　结论①　29～32NTU,5～7℃,6.7×107/L,,AS/PDMAS,PDMAS,AS/PDM,PDM,,。②　1NTU,,AS6mg/L,4.11～5.99mg/L。③　,AS/PDM,AS,。,AS/PDM。:[1]　.[J].,2003,15(2):133-138.[2]　,,.[J].,2001,12(1):1-2.[3]　,,.[J].,1998,8(2):39-40.[4]　GilG,PatrickW,MatthewM.Enhancedcoagulation:ItseffectonNOMremovalandchemicalcosts[J].JAW-WA,1995,87(1):78-89.[5]　,,,.[J].,2006,27(5):909-912.[6]WandreyC,Hernández-barajasJ,HunkelerD.Dial-lyldimethylammoniumchlorideanditspolymers[J].AdvPolymSci,1999,145(2):123-182.[7]　,,,.[J].,2000,20(2):168-172.[8]　,.[J].,2002,16(2):16-19.[9]　,,.[J].,2003,24(1):103-106.[10]　,,.[J].,2002,22(3):26-28.[11]　,,,.PDMDAAC[J].,2007,23(13):106-108.[12]　,,,.、[J].,2007,23(13):52-55.[13]　,,,.PDA[J].,2001,21(1):24-27.:[phone]E-mail:[e-mail]:2007-12-30·99·李潇潇,等:AS/PDM对冬季预加氯太湖水的除浊效果研究第24卷　第7期