电镀废水的纳滤膜处理工艺及案例

305Vol.30No.5201010MEMBRANESCIENCEANDTECHNOLOGYOct.20101,2,3(1.,200237;2.(),100176;3.,200237):2(IBMS2CP)IBMS2CP,.IBMS2CP,.:(CrCuNi)14010-6,5300S/cm,93%96%,:,120S/cm.IBMS2CP.,,.:2;;;:TQ028.8:A:100728924(2010)0520067204,,,.,:.,,[1,2].,,().,,,.121.1,.,;.,,,pH,[3].,:,,pH.CuNi,CuNipH6.89.5,,CuNipH,.,.,,,.,.,NFRO,.,,,:2009208215;:2010201206:(19642),,,,,E2mail:[e-mail]6830,.1.222(IBMS2CP),(1).1,IBMS2CP,,,.,,,...:,,IBMS2CP.12Fig.1SchematicdiagramofIBMS2CPprocess,,IBMS2CP,IBMS2CP,IBMS2CP.,,IBMS2CP,.,,,IBMS2CP.2IBMS2CP,,.,,,,,;,(),.,,.,,,.2.11.,,:pH67;300S/cm;0.110-6;SS1010-6.1Table1Waterqualityandquantityofelectroplatingwastewater()/(td-1)Cr6+:2610-6,pH325CN-:5010-6,Cu2+:5010-6,Ni2+:5010-6,pH=810160Cu2+:5010-6,Ni2+:5010-6,pH380Cu2+:20010-6,Ni2+:5010-6,pH390HCl,pH=1353902.2,,.:IBMS2CPRO.:,,pH.2,,IBMS2CP.RO.RO,RO.IBMS2CPDL28040C,,.RO(ROI)BW302400.99.5%.RO(ROII)SW30HRLE2400.IBMS2CPRO.,.5:692Fig.2Schematicdiagramoftreatmentandreuseofelectroplatingwastewater.,,.2.3IBMS2CP17.,,,:.,,IBMS2CP.320097,.,.(),.6100S/cm,2020S/cm,()9.25.9kg/cm2.,,4000S/cm,5300S/cm,.,.(pH).,.4,,3Fig.3EffectofInfluentwaterconductivityoninfulentpressure.,,,.,2.,,,RO.4Fig.4Influentwater,effluentconductivityandsaltrejectioninnanofiltrationsystem2IBMS2CPTable2RejectionefficiencyofheavymetalsinelectroplatingwastewaterCuNiCr0820221876.343.75.11.171.67N/A0820320154.645.15.50.891.62N/A0821123061.139.44.31.040.84N/A5.5,,,3.,7030,:6h.5Fig.5ChangeofpressuredifferenceduringtheoperationofnanofiltrationsystemRORO72%80%75%82%,93%96%..,RO3,.RO,.3IBMS2CP,,.1)IBMS2CP/.IBMS2CP,,,.2)IBMS2CPRO,RO,.3),,,.[1]CastelblanqeJ,SalimbenyF.NFandROmembranesfortherecoveryandreuseofwaterandconcentratedmetallicsaltsfromwastewaterproducedintheelectro2platingprocess[J].Desalination,2004,167:65-73.[2]FrenzelI,StamatialisDF,WesslingM.Waterrecyclingfrommixedchromicacidwasteeffluentsbymembranetechnology[J].SepPurifTechnol,2006,49:76-83.[3],,.[J].(),2005,24(3):107-111.Treatmentandreuseofelectroplatingwastewaterbyinteractbalancemembraneseparation2chemicalprecipitation(IBMS2CP)processBAIXinping1,HAOWenchao2,XUZhenliang3(1.ShanghaiClarFluideEngineeringTechnologyCo.,Shanghai200237,China;2.PallFilter(Beijing)Co.,Ltd.,Beijing100176,China;3.MembraneScienceandEngineeringR&DLab,ChemicalEngineeringResearchCenter,ECUST,Shanghai200237,China)Abstract:Interactbalancemembraneseparation2chemicalprecipitation(IBMS2CP)processanditsindustryapplicationofelectroplatingwastewatertreatmentandrecyclingareintroduced.IBMS2CPprocessisanano2filtration(NF)systemwhichisembeddedintoachemicalprecipitationtoacceleratingandenhancingtheprecipitationprocess,meanwhiletheNFsystemreachesbalanceautomatically.ThepermeatingflowfromNFsystemcouldbefurthertreatedbyROand/orotherproperprocessestoreachextremelyhighrecoveryrateandqualityofwaterreusedemandedinindustryprocess.Theoperationdatashowthattherecoveryratereaches93%96%,nonetotalheavymetal(mainlyCr,Cu,andNi)detectedandconductivitylessthan120S/cmoftreatedrecyclingwater,respectively,whilethefeedstreamhasaconductivityof5300S/cmandcontainstotalheavymetals(mainlyCr,Cu,andNi)ashighas14010-6(massfraction).IBMS2CPprocesspresentshighadaptabilityandoperationstabilitytofeedvariety.Thisnewdevelopedprocessissuitabletotreatandrecyclenotonlytheelectroplatingwastewater,butprecipitablecations,metalions,heavymetals,andfluoridewastewateraswell.Keywords:Interactbalancemembraneseparation2chemicalprecipitation;electroplatingwastewater;heavy2metalwastewater;wastewaterrecycle