二段混凝沉淀曝气氧化砂滤处理印刷电路板废水

:2005207204:(1979-),,,2004--,(,610031):,--,,(GB8978-1996):;;;;;:X703:A:100123644(2005)0620028203TreatmentofPrintedCircuitBoardWastewaterbyTwo2stageCoagulation/Sedimentation-AeratedOxidation-SandFiltrationProcessCHENJin2wen,LIUDan(SchoolofEnvironmentalScience&Engineering,SouthwestJiaotongUniversity,Chengdu610031,China)Abstract:Theprocessofprintedcircuitboard(PCB)wastewatertreatmentisdiscussedinthispaper.AccordingtothecharacterofwastewaterfromaPCBplant,aprocessoftwo2stagecoagulation/sedimentation-aeratedoxidation-sandfiltrationisused.Theoperationresultsshowthatthepretreatmentofwastewatercollectedbyclassification,aeratedoxidationandthedosageofheavymetalchelatingagentarekeymeasurestoensuretheeffluenttomeettherelevantdischargestandards.TheeffluentisbelowtotheClassAofIntegratedWastewaterDischargeStandard.ThisresearchleadstoafeasibleapproachforPCBwastewatertreatment.KeyWords:Printedcircuitboard;wastewater;coagulation/sedimentation;aeratedoxidation;sandfiltration;heavymetalchelatingagent1,,,CODCrCu2+CODCr,,[1]Cu2+,,Cu2+,[2],2211,,50()(),,1822005246©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(t/d)pHCODCr(mg/L)Cu2+(mg/L)SS(mg/L)125006880120102010020040t/d,50t/d239057-1405003165105000101200431210001001000559104000500150621214200000--7434-20000-,831310005000-,940068400-2003072(GB897821996),:CODCr100mg/L,BOD520mg/L,015mg/L,SS70mg/L,pH692121;212,Cu2+,CODCr,pH,NaOHpH815,Na2SFeCl3,CuSFe(OH)3Cu(OH)2,,(PAM),[3],pH,,,NP,Na2SYC22,,,,,,3311922005246©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(GB8978-1996)(2),2(mg/L)123CODCr221623037919060Cu2+110132420112460124SS312810316718219810,CODCr7080mg/L,Cu2+013mg/L31231211,,,,,[4],CODCr,B/C,,pH3,,,CODCr70%,,Cu2+80%31212,,,,Na2SNH3[5],,CODCr3040mg/L,,4h,(510)131213Cu2+12mg/L,FeCl3FeSO4PACCu2+015mg/LEDTA,Cu2+Ni2+Pb2+[6,7],,JZ22,Cu2+,(EDTA2Cu),,Cu2+JZ2220mg/L,Cu2+013mg/L4--,(GB8978-1996)4,CODCr7080mg/L,Cu2+013mg/L:[1],1[J]1,1999,19():772791[2],1[J]1,2005,25(2):18021851[3]1[M]1:,19891[4],1[J]1,2002,(2):4261[5]WWesleyEckenfelderJr1IndustrialWastePollutionControl(ThirdEdition)[M]1:,20021[6]1[M]1:,19971[7],,,1[J]1,1999,20(1):652671032005246©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.