不同水处理工艺流程对除藻效果的影响

梁恒1,李圭白1,李星2,韩宏大3(1.哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090;2.北京工业大学建筑工程学院,北京100022;3.天津自来水集团有限公司,天津300121):为了解和考察不同处理流程各种预氧化剂的除藻效果及对除藻特性的影响,首先研究了春季天津市/引黄0原水藻类的数量与分布特征,发现该季节优势藻为小球藻绿梭藻和栅列藻对比了预氯化沉淀单独气浮预臭氧化气浮和高锰酸盐复合药剂(PPC)预氧化气浮工艺的除藻效果和除藻特性结果表明各种工艺流程的除藻特性有明显差异,采用气浮工艺代替沉淀工艺能够提高对原水中不同优势藻的去除率,预臭氧化和PPC预氧化能够进一步提高气浮工艺对优势藻的去除率PPC预氧化去除小球藻更有效,而预臭氧化去除绿梭藻和栅列藻效果更好预臭氧化和PPC预氧化能够提高气浮工艺去除叶绿素a的能力:水处理流程;除藻;气浮;预处理:TU991.2:A:1000-4602(2005)03-0005-03:(863)(2002AA601140)EffectofWaterTreatmentProcessSelectiononAlgaeRemovalEfficiencyLIANGHeng1,LIGu-ibai1,LIXing2,HANHong-da3(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.SchoolofArchitecturalEngineering,BeijingInstituteofTechnology,Beijing100022,China;3.TianjinWaterSupplyGroupCo.Ltd.,Tianjin300121,China)Abstract:Inordertoinvestigatetheeffectofdifferenttreatmentprocessandvariouspre-oxidantsonalgaeremovalefficiencyandperformance,studywasmadeonalgaequantityandcharacteristicdistr-ibutioninrawwaterdivertingfromtheYellowRiverinspring,anditisobservedthatthedominantspeciesarechlorella,chlorogonium,andscenedesmus.Comparisonwasmadeontheprocessesofpre-chlorination/sedimentation,singleairflotation,andpreozonation/airflotationandpotassiumpermanganatecompos-ite(PPC)preoxidation/airflotationfortheiralgaeremovalefficiencyandperformance.Theresultshowsthatvariousprocesseshavesignificantdisparityinalgaeremovalperformance.Airflotationprocessinplaceofsedimentationcanimproveremovalrateofdominantalgaefromrawwater,anditscapabilityinremovingdominantalgaecanbeimprovedbypreozonationandPPCpreoxidation.PPCpreoxidationismoreefficientinremovingchlorella,andpreozonationismoreefficientinremovingchlorogoniumandscenedesmus.PreozonationandPPCpreoxidationcanimprovethecapabilityofairflotationprocessinre-movalofchlorophylla.Keywords:watertreatmentprocess;algaeremova;lairflotation;pretreatment#5#第21卷第3期2005年3月中国给水排水CHINAWATER&WASTEWATERVo.l21No.3Mar.20051试验装置及方法1.120043)411Fig.1Flowchartofexperiment:5m3/h;20min;1min;18min;15min,8%;28min;()400mm,600mm,8m/h,,4:1()vCl2vvvv(Cl24~5mg/L,FeCl38mg/L)2()vvvv(FeCl38mg/L)3()vO3vvvv(O31.0mg/L,FeCl38mg/L)4(PPC)vPPCvvvv(PPC1.0mg/L,FeCl38mg/L)1.2/0,,a7542结果与讨论2.1/03)4/01.5@107/L,,,6,1.44@107/L,0.651@107/L,0.345@107/L,0.155@107/L,0.289@107/L2.2,1.44@107/L,0.62@107/L,60%;0.23@107/L,0.20@107/L,PPC0.18@107/L,,327%30%31%,80%;PPC2.3,,,0.295@107/L,30.215@1070.107@1070.089@107/L,,12%29%32%;,0.194@107/L,30.170@1070.061@1070.069@107/L,,7%38%36%;,0.042@107/L,30.033@1070.024@1070.027@107/L,,6%12%9%,;PPCPPC;PPC#6#第3期中国给水排水第21卷,,,2.4aa,,a1995)2003,/0/0a,a,20043)4/0a30Lg/L,a28.33Lg/L,,aa4.25Lg/L,3a3.831.570.78Lg/L,,3a2.5%9.5%12.3%,a,PPCa,a,a,a3结论1@107/L,;PPC,,PPCPPC,PPCa:[1],,,.[J].,2000,26(9):25-27.[2],.[J].,2002,18(8):36-39.[3],,,.[J].,2000,16(11):58-60.:(1979-),,,,:[phone]E-mail:[e-mail]:2004-11-30##湖北襄城污水处理工程该工程处理规模:13@104m3/d,投资总额:25792万元,建设周期:2005年)2006年,进展阶段:正在报批项目建议书(立项),关键设备:格栅水泵曝气机脱水机建设单位:襄樊市城市污水治理公司(BHI):010-68571248/0891第3期梁恒,等:不同水处理工艺流程对除藻效果的影响第21卷