付昆明1, 李 冬1, 朱兆亮1, 张 杰1,2(1.北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100022;2.哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090) : 针对太原市呼延水厂出水浊度不达标的问题进行了絮凝试验研究。结果表明:该厂原水属低温低浊水,有机胶体较多,絮凝效果差,其根本原因是絮凝剂投量不足。进一步的试验表明:以聚合氯化铝(PAC)为絮凝剂、以活化硅酸为助凝剂,除浊效果较好;活化硅酸的投加时间对絮凝效果有较大的影响,以快速混合用时1min、聚合氯化铝投量为15mg/L、延迟30s后投加0.5~1mg/L的活化硅酸(以SiO2计)为最佳运行条件;滤池反冲洗排水回流至配水井有利于低温低浊水的处理,并可节省絮凝剂或助凝剂的投量。 : 低温低浊水; 活化硅酸; 聚合氯化铝:TU991.2 :C :1000-4602(2008)11-0039-05ExperimentalStudyonFlocculationofLowTemperatureandLowTurbidityWaterinHuyanWaterTreatmentPlantFUKun-ming1, LIDong1, ZHUZhao-liang1, ZHANGJie1,2(1.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China;2.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China) Abstract: BecausetheturbidityoffinishedwaterfromHuyanWaterTreatmentPlantcannotcomeuptothewaterqualitystandard,aseriesoftestswereconductedtosolvethisproblem.Theresultsshowthattheflocculationefficiencyoftherawwaterintotheplantispoorduetoitslowtemperatureandlowturbidity,andthebasicreasonofnotreachingthestandardisthattheflocculantdosageisinsufficient.Thebetterefficiencyofturbidityremovalcanbeattainedwhenpolyaluminumchloride(PAC)ischosenasflocculantandactivatedsilicaischosenascoagulantaid.Theaddingtimeofactivatedsilicaisveryimportanttoflocculation.Theoptimaloperationconditionsarethattherapidmixingtimeis1min,thedosageofPACis15mg/L,andactivatedsilica(calculatedasSiO2)of0.5mg/Lto1mg/Lisaddedaf-ter30s.Therefluxofbackwashingwaterfromfiltersisbeneficialtotreatmentoflowtemperatureandlowturbiditywater,andbothflocculantandcoagulantaidcanbesaved. Keywords: lowtemperatureandlowturbiditywater; activatedsilica; PAC ,,。,,,。,,,·39·第24卷 第11期2008年6月 中国给水排水CHINAWATERWASTEWATER Vol.24No.11Jun.2008,[1],。1 呼延水厂概况及存在的问题,,40×104m3/d。,1[2]。1 Fig.1 Flowchartofwatertreatmentprocess(PAC),,。,20×104m3/d,。,。2 试验材料与方法2.1 :();()。1。1 Tab.1 QualityofrawwaterandmixedwaterNH3-N/(mg·L-1)pH/(mg·L-1)/NTUCODMn/(mg·L-1)/℃0.298.48224.322.8~3.53.04~60.278.28237.716.2~9.57.54~6 : CaCO3。2.2 :(PAC),,Al2O326%,94.39%;PAC,,Al2O331%,88.56%。:(PAM),。PAM,0.05%;(Na2SiO3)H2SO4(98%),85%,50min,0.5%(SiO2,)。2.3 ,(2)。,PACPAC,PAC。PAM、,。,,。2 Tab.2 Operationconditionsintest /(r·min-1)3006030/min1.010103 结果与讨论3.1 ,6.3NTU,4℃,PACPAC,2,20min,,2。2 PACFig.2 EffectofPACdosageonturbidityremoval2,PAC,,PAC10~15mg/L,≤0.4NTU。2,,;15mg/L,。,PAC·40·第24卷 第11期 中国给水排水 。,PAC,PAC。PAC5mg/L,,。,,10~15mg/L。3.2 ,6.3NTU,4℃,PAM,[3],PAM0~0.05mg/L,PAC15mg/L,2,20min。3。3 Fig.3 Effectofcoagulantaidonturbidityremoval3,PAM0.005~0.015mg/L,(0.1NTU)。PAM,。,。,,,1mg/L。,,,,。,。,,[4];PAC、,[5];,[6]。,PAM[6],。3.3 51L(1#~5#),,:6.3NTU,PAC15mg/L,0.5mg/L。:1#30s,1.5min,300r/min,2;2#~5#2,2#,3#~5#0.5、1、1.5min。,1#(),1#~5#0、0.5、1.0、1.5、2.0min。20min,4。4 Fig.4 Effectofaddingtimeofcoagulantaidonturbidityremoval4,(),。,,。,30s,(0.4·41·付昆明,等:呼延水厂低温低浊水的絮凝试验研究第24卷 第11期NTU);,,,,;。,,。,,,。、,[7]。3.4 PAC,,,PAC(15、25、35、50mg/L),,5。5 PACFig.5 ComparisonofturbidityremovalfromrawwaterandmixedwaterunderdifferentdosageofPACandactivatedsilica 5,PAC,。,PAC15mg/L,0.5~1mg/L;PAC50mg/L,1mg/L。,PAC15mg/L,0.5mg/L;PAC50mg/L,3mg/L。,15mg/L,。,PAC15mg/L,0.5~1mg/L。5,,,、,[8]。,,,。,。4 结论与建议① ,。② ,1min,30s。③ ,。,PAC15mg/L、(SiO2)0.5(下转第46页)·42·第24卷 第11期 中国给水排水 。,、。③ ,。,,400℃,70℃,80%,,,,(90%)。④ 、。,,,、、,、。:[1] ,.[M].:,2003.[2] ,.[J].,2005,21(1):101-103.[3] ,.[J].,2003,29(11):19-22.[4] ,.[J].,2005,27(3):225-229.[5] ,,HGHohnecke.[J].,2004,22(3):76-79.[6] .[J].,2003,(12):23-24.[7] ,,.[M].:,2005.[8] .[M].:,2005.E-mail:chye1978@163.com:2008-01-09(上接第42页)~1mg/L。,,。④ ,。⑤ ,、。,,,。:[1] ,.[J].,1998,14(6):33-34.[2] .[J].,2002,28(1):4-7.[3] ,,,.[J].,2001,32(6):17-18.[4] ,,,.[J].,2002,18(5):51-52.[5] ,,,.PDA2000[J].,2003,19(1):53-57.[6] .3:(2)[M].:,2004.[7] ,,,.[J].,2002,22(10):29-31.[8] .[J].,1995,21(1):12-15.:13811502524E-mail:fukunming@yahoo.com.cn:100022100:2008-01-08·46·第24卷 第11期 中国给水排水