丹江口水库水低温低浊期混凝剂优选

檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲檲殘殘殘殘112341．3003842．3000403．1300214．1500903FeCl3、PACAS。FeCl3PAC12mg/L0．380．30NTUASUV254UV254PAC＞AS＞FeCl312mg/L59%57%52%FeCl3PAC20～30minAS40min。PACUV254。TU991．2A1673－9353201401－0001－06doi10．3969/j．issn．1673－9353．2014．01．00111ZCKFSF017002012ZX07404－002OptimalselectionofcoagulantsfortreatinglowtemperatureandlowturbidityDanjiangkouＲeserviorwaterSunYunkai1HeWenjie12SunYing3TanHaoqiang41．SchoolofEnvironmentalandMunicipalEngineeringTianjinChengjianUniversityTianjin300384China2．TianjinWaterworksGroupCo．Ltd．Tianjin300040China3．ChinaNortheastMunicipalEngineeringDesignandＲesearchInstituteChangchun130021China4．HarbinInstituteofTechnologyHarbin150090ChinaAbstractAimedatthelowtemperatureandlowturbidityDanjiangkouＲeserviorwatertheoptimalselectionwasconductedonthedosageandsedimentationtimeofferricchlorideFeCl3polyaluminumchloridePACandaluminumsulfateASbycoagulationsedimentationbeakertest．TheresultsindicatedthatthedosageofFeCl3andPAChadstrongnegativecorrelationwithresidualturbidityamongtestscope．Theminimumresidualturbiditywasobtainedin12mg/Lwhichwas0．38NTUand0．30NTUrespectively．ItwassuperiortoASobviously．ThecoagulantdosagehadpositivecorrelationwithremovaleffectofUV254theremovaleffectofUV254wasPAC＞AS＞FeCl3．Themaximumremovalratewasobtainedin12mg/Lwhichwas59%57%and52%respectively．TheflocsedimentationvelocitywasfastwhichformedbyFeCl3andPAC．Thecompletesedimentationcouldgetin20to30min·1·8120142WATEＲTECHNOLOGYVol．8No．1Feb．2014andthesedimentationtimeofdosingASwasmorethan40min．TheadaptabletestwasconductedintherelationofoptimaldosageofPACturbidityandUV254inpilotsystemandtheresultsweregood．KeywordslowtemperatureandlowturbiditywaterDanjiangkouＲeservoircoagulant、、、《》GB3838—2002Ⅰ、Ⅱ。12310℃3NTU。、、、1－2。。3、。11.11.1.1HACH2100QZＲ4－6JA2003B0．001gSP－19000．45μmHACHHQ40d。6m3/h110r/min60s332518r/min5～8m3/m2·h1．8mm/s9．6min。1.1.2PACAl2O330%FeCl3AS。30．5g/LPACASAl2O3FeCl3Fe。1.2。1。1Tab．1Indexofrawwaterquality/℃/NTUUV254/cm－1CODMn/mg·L－1pH6．8～9．91．01～2．910．0312～0．05321．32～1．868．10～8．318．41．890．04291．538．231.33。UV254CCCO3。UV254。61L2。10min4cm0．45μmUV254。2030min。57mg/L2。PACUV254。2Tab．2Stirringconditions/r·min－1/s1/r·min－11/min2/r·min－12/min3/r·min－13/min400501205805405·2·812014222.1102030min31～3。10min3UV2544投加量/（mg·L-1）23.02.52.01.51.00.5余浊/NTU100806040200去除率/%04681012FeCl3AsPACFeCl3AsPAC余浊：去除率：110minFig．1Ｒelationofcoagulantdosagewithresidualturbidityandremovalrateofturbidityfor10min投加量/（mg·L-1）2046810123.02.52.01.51.00.5余浊/NTU100806040200-20去除率/%FeCl3AsPAC余浊：FeCl3AsPAC去除率：220minFig．2Ｒelationofcoagulantdosagewithresidualturbidityandremovalrateofturbidityfor20min24681012投加量/（mg·L-1）3.02.52.01.51.00.5余浊/NTU0100806040200-20去除率/%FeCl3AsPAC余浊：FeCl3AsPAC去除率：330minFig．3Ｒelationofcoagulantdosagewithresidualturbidityandremovalrateofturbidityfor30min24681012投加量/（mg·L-1）00.0600.0550.0500.0450.0400.0350.0300.0250.020出水UV254/cm-1100806040200去除率/%FeCl3AsPACUV254：FeCl3AsPAC去除率：410minUV254Fig．4ＲelationofcoagulantdosagewithsedimentationoutflowUV254andremovalratefor10min2.1.1FeCl31～3FeCl3。1mg/L。1mg/L4mg/LFeCl3。FeCl34mg/L102030min53．4%63．7%66．7%。4mg/LFeCl3FeCl3。30．600．380．38NTU。12mg/L370%FeCl33。10min2030min。FeCl3。33Tab．3CorrelationbetweenthreecoagulantsdosageandresidualturbidityFeCl3PACAS10min－0．862646－0．712236－0．68600620min－0．857451－0．788453－0．21595330min－0．855267－0．787165－0．224678FeCl3·3·20142814。2.1.2PACPACFeCl3。PAC4mg/L。3PAC4mg/L61%65%69%12mg/L55%69%75%0．650．560．30NTU。PAC3。PAC、FeCl35－6。2.1.3AS1～3AS0mg/L5mg/L5mg/L0．74NTU50%～60%。8mg/L。。AS。ASFeCl3PACAS7。AS3。3。3FeCl3＞PAC＞AS。2.1.43UV254UV2544。43UV254UV254UV254。3UV254UV254。3UV254PAC＞AS＞FeCl3。12mg/L3UV25459%57%52%。UV2544。UV254。43UV254Tab．4CorrelationcoefficientbetweenthreecoagulantsdosageandoutflowUV254FeCl3PACAS－0．950296－0．962200－0．9357072.257mg/L。5～7。。FeCl320min25min0．560．47NTU70%76%。PAC25min25min30min0．470．37NTU76%81%。AS20min50min0．600．48NTU75%80%30min0．850．86NTU65%64%。·4·8120142余浊/NTU1520253035沉淀时间/min101.00.80.60.40.29080706050去除率/%5mg/L投加量7mg/L投加量5mg/L投加量7mg/L投加量余浊：去除率：5FeCl3Fig．5ＲelationbetweensedimentationtimeresidualturbidityandremovalrateofturbidityundertwodosageconditionsofFeCl35mg/L投加量7mg/L投加量5mg/L投加量7mg/L投加量去除率/%1520253035沉淀时间/min10余浊/NTU1.00.80.60.40.29080706050余浊：去除率：6PACFig．6ＲelationbetweensedimentationtimeresidualturbidityandremovalrateofturbidityundertwodosageconditionsofPAC5mg/L投加量7mg/L投加量5mg/L投加量7mg/L投加量余浊：去除率：去除率/%余浊/NTU2030405060沉淀时间/min102.01.61.20.80.40100806040207ASFig．7ＲelationbetweensedimentationtimeresidualturbidityandremovalrateofturbidityundertwodosageconditionsofAS30minPAC。FeCl3PAC20～30min。FeCl3PAC。AS。2.31NTU1NTU。3PAC1500/Al2O330%FeCl3850/38%～40%AS960/Al2O316．5%。1NTU20min35。5Tab．5CostanalysisFeCl3PACAS/mg·L－12．1Fe2．5Al2O33．5Al2O3/kg15．638．3321．2/13．2912．5020．35PACFeCl3AS5．9%38．6%。2.4。PAC1．5～4．0mg/L。UV25489。89PAC1．5mg/L4．0mg/L。4．0mg/L0．83NTU47．6%。PACUV254。PAC1．5mg/L4．0mg/LUV254·5·201428124．3%43%。去除率/%2025303540投加量/（mg·L-1）15浊度/NTU2.01.51.00.5050403020100原水浊度沉后水浊度沉后水去除率8PACFig．8ＲelationbetweenPACdosageturbidityandremovalrateinpilotsystem去除率/%UV254/cm-12.02.53.03.54.0投加量/（mg·L-1）1