电镀废水中氨氮及COD的去除李冰璟

WATERPURIFICATIONTECHNOLOGYVol.30,No.5,2011October25th,20112011305115-118154WaterPurificationTechnology、、。90%[1]Cr6+、Cu2+、Ni2+、Fe3+[2]、、、、[3]AuCN2、CuCN42-[4]。。、、[5]、[6]。、、、、。、COD。1、COD200031Ni+、Cu2+。、MBRCODMBR15mg／L。++MBRCOD。MBRCODTU992.3B1009-0177201105-0115-05EliminationofNH3-NandCODinElectroplatingWastewaterLiBingjing,FuDan,ZhaoWei(ShanghaiLightIndustryResearchInstituteCo.,Ltd.,Shanghai200031,China)AbstractElectroplatingwastewatercontainheavymetals,acid,organicwasteandmanyothercontaminations.Heavymetalrecy－clingiswelldevelopedduetotheprofitabilityofmetalrecycleindustriessuchasNi+andCu2+.Whilethestudyoforganicpollutantsinelectroplatingwastewaterisstillinthestartingstage.TheremovalofNH3-NandCODinelectroplatingwastewaterbyhydrolyticacidification+aerobicmembrainebioreactor(MBR)wasinvestigatedusingiron-carbonmicro-electrolysisasthepretreatmenttoin－surethelowestheavymetalconcentrationandincreasebiodegradabilityofwastewater.TheeffluentNH3-Nconcentrationislessthan15mg／Lafterthetreatmentofhydrolyticacidification+MBRrecyclingprocess.CarbonresourceisaddedaccordingtotheNH3-Nconcention.Theiron-carbonmicor-electroplatingandhydrolyticacidification+MBRprocessremoveNH3-NandCODinelectro－platingwastewatereffectively.Keywordsiron-carbonmembranebioreactor(MBR)NH3-Nchemicaloxygendemand(COD)[]09-205[]1980-。[e-mail]。115--DOI:10.15890/j.cnki.jsjs.2011.05.002Vol.30,No.5,2011.CODCOD2CODB／C3COD4++MBRCOD。11.112002《》。1.22。3。1。MBR。pH。6.9L15hMBR3L7h。20%、50%、100%。22.1。。[H+][7]2∶1Cr6+、Cu2+、Ni2+50、15、10mg／L2.5、0.75、0.5mg／LpHFe2+Fe3+FeOH3ξ[8]COD800~1200mg／L80~120mg／L[9]。pH。1Tab.1MeasurementMethodsCODNH3-NBODGB／T11914—1989HJ535—2009HJ505—2009GB／T7475—87GB／T11912—892Tab.2ListofTestEquipmentspHPHS-3ECX-00869010Jenco3Tab.3IndexesofElectroplatingWastewaterQualityCODCrBOD5NH3-NTNCu2+／mg·L-1100～25030～10010～301001～122135791011864NaOH12HSO1.2.3.4.5.6.7.8.9.MBR10.11.MBR12.1Fig.1FlowchartofTreatmentProcess116--WATERPURIFICATIONTECHNOLOGYVol.30,No.5,2011October25th,20112.1.1pHpHpHpHpH3pH30minpH41hpH5pH1.5h5.6。pHpH=4、pH=5、pH=5.6pH1hpH14h。B／CBOD／COD2pHB／CpH5.6BODpH=5.6B/C[10]。pH5.6。2.1.2pHpHpHpHFe2+pH。pHpH2、2.5、3、3.5460min4、5pHB/CpH。pH=2~4pH。0.450.40.350.30.250.20.150.10.050B／CpH=3pH=4pH=5pH=5.61h14hpH2B／CFig.2InfluencetoB／CinDifferentReactionTimewithIon-CarbonpH=4pH=5pH=5.61h14h／%302520151050pH3Fig.3RemovalRateofSerevalIndexesinDifferentReactionTimewithIon-CarbonCODBODNH3-NpHpH=2pH=2.5pH=3pH=3.5pH=40.320.320.320.320.320.320.320.320.310.310.310.31B／C4pHB／CFig.4InfluencetoB／CwithDifferentpHConditonsinIon-CarbonReaction117--Vol.30,No.5,20112.2MBRMBR6、7COD、BODCOD、BOD36.27%55.81%MBRCODBOD69.57%75.79%。70%8。15mg／L。31pH=2～4pHpHB／C。2COD36.27%BOD55.81%。154／%2520151050-5-10-15pHCODBODNH3-NpH=2pH=2.5pH=3pH=3.5pH=45pHFig.5InfluencetoRemovalRateofSeveralIndexeswithDifferentpHConditionsinIon-CarbonReaction6CODFig.6CODRemovalRatebyMBR39414455586067／d1009080706050403020100BOD／%MBR1162339445867127132／d1009080706050403020100COD／%MBR7BODFig.7CODRemovalRatebyMBR.COD／d35302520151050NH3-N／mg·L-18Fig.8NH3-NRemovalRatebyMBR13039445560121126129132MBR118--Vol.30,No.5,20111183MBRCOD69.57%BOD75.79%。15mg／L。4++MBRCOD。1.[J].,2006,26(5):36-40.2,.[J].,1989,8(1):18-22.3.[J].,2010,37(8):142-144.4,,,.[M].:,2003.5.[D].:,2008.6,,,.[M].:,2005:127.7,,.-[J].,2007,27(4):338-341.8,,,.[J].,2010,38(5):62-64.9,,,.[J].,2008,9(35):74-77.5680%2.24～4.71L／L1.10～2.43L／L。80%30min。。4180％2.24～4.71L／L1.10～2.43L／L。80%30min。。2。。3790%KLa。。580%Tab.5TimeandGas／WaterRatiowhenTrichloroethyleneRemovalRatewas80%Q／L·min-180%／min80%／L·L-10.40.60.81.01.21.423.5714.5911.058.546.554.304.714.374.424.273.932.24680%Tab.6TimeandGas／WaterRatiowhenTetrachloroethyleneRemovalRatewas80%Q／L·min-180%／min80%／L·L-10.40.60.81.01.21.412.169.857.995.543.881.572.432.963.202.772.331.10.154--