电镀废水处理验收达标总结报告郭崇武

:2009—01—15:郭崇武(1960-　),男,吉林辉南人,大学本科学历,高级工程师,从事电镀技术工作,在国内外发表论文数十篇。郭崇武1　李健强1　梁恒泉2(1.肇庆市华良金属精饰制品有限公司,广东肇庆,526105;2.广州正本机电设备有限公司,广东广州,510280)　　总结了电镀废水处理验收达标的工作经验。用漂水和双氧水组合处理法处理电镀含氰废水,效果好且成本低。可以用双氧水处理镀镍废水中的氰化物,但不能使用漂水处理,在碱性条件下Ni2+离子被次氯酸钠氧化生成Ni(OH)3沉淀。用石灰处理含酸废水比用氢氧化钠成本低,设置两个中和池,在一级中和池中加石灰处理掉大约90%的废酸,同时在二级中和池中加石灰处理剩余的废酸。在二级中和池中用pH自动控制系统控制石灰的加入量,保证被处理水浊度达到标准要求。　电镀废水;双氧水;漂水;处理方法1　,41,1500t,1000m3。20061,:、、、、、、、、pH9,1,,。20062,,。,,4,9。2　2.1　、、。、Cu+Zn2+,。,、。,1。1　　ρ(CN-)mg/Lρ(Cu)mg/L,m32214985322215855711602224554662225225651602233483282235555501602247005332245275101602255345212256485521602.2　,,,,[1]。,,25L。、、。4320096　　　　　,,。5,,2。,221。2　、　ρ(CN-),mg/Lρ(Cu),mg/L,2215.4334.02210.044.031402223.0922.82222.2219.51302232.5548.22235.5224.21202243.579.652244.6828.71302255.6727.22254.7112.51202.3　,,,,。,,,,,,,。,,,,,。,。,10%,30%。4,。,100mL4200mL,,3。100mL4200mL,,4。,,。,,30min。,5.2mg/L,60min,3　mLminCN-,mg/LCu,mg/L10.13015.60.356.51.820.1308.20.354.61.630.1305.20.137.80.6740.23022.90.145.90.974　mLminCN-,mg/LCu,mg/L10.524015.60.356.531.920.52408.20.254.614.930.5605.20.137.817.3416022.92.545.925.4,20mg/L,60min,240min,。,,。,。,30min。,30min,2,。,[2]。。,,70%-90%,500mg/L100mg/L,。,,,,,,。,,,5。5,87.5%,25%。,44　　　　　　　　　　20093,,。,5,。5　、　　ρ(CN-)mg/Lρ(Cu)mg/L,3160.070.053160.322.096123170.071.53170.143.4105123180.351.83181.12.594123190.040.953190.072.796123　3.1　,(),。:、、、、、pH。,。,6。,,、。6　　　ρ(CN-)mg/Lρ(Cu)mg/Lρ(Ni)mg/L32010.44.072.933217.683.421.8032210.80.066.053237.451.013.4232412.65.864.003.2　pH10,,,ORP,。,,ORP,,。,,[3],,。,。3.3　,,,,COD。,。。3,,pH10,,,7。,,。7　H2O2,mL/Lρ(CN-),mg/L10.42.090.29214.510.2032.513.50.143.4　12。,,,pH,pH10。ORP,ORP,。pH10,,[4]。,。,,,。,,。4520096:　,。,,。,,,,。,pH,pH,pH6-9,。,COD,COD,pHCOD。4　4.1　,,,8。8　　　ρ(CN-),mg/Lρ(Cu),mg/L162.80.076.10.32161.80..343.51.8170.910.041.80.05172.40.072.50.11181.60.044.30.05182.30.064.30.11193.80.127.60.95193.20.084.30.16　　,。,,,。,,。,,,ORP。4.2　4.2.1　存在的问题,,,,。,pH,1,600m3,,2450kg,18。1900,2.5。,。:(1),40%;(2)。:、、、、、pH、、。,。,,。,,,,pH,,,,,。,,,。1,,pH。1,,。,,[5]。,pH,,。,,,,。,pH46　　　　　　　　　　20093,,pH。,,。4.2.2　解决方法pH,,90%,pH。,,,,,pH,。90%,10%。,,。pH,pH,,pH,。pH。,pH,,,。,,。4.2.3　废水处理状况,,pH,,。7pH、、,9。,,,,9。,pH。5　COD、。COD,10。9　pH　　pHCu2+,mg/LNi2+,mg/LCN-,mg/L4118.470.050.560.084128.980.650.780.144138.610.380.050.324148.370.870.340.134158.530.680.290.034168.270.900.780.034178.240.920.120.0710　COD　　COD,mg/L3281133291183301023311094217043135　　COD,,,2,,COD。,,,,,。COD。6　,pH3,。1,ORP,pH。,,、pH,。7　,。1,6,500mL,11,5。4720096:　11　mg/LCN-Cu2+Ni2+Cr6+COD0.030.270.390.09620.51.01.00.5150:GB8978-1996。,12。9GB8978-1996。12　　　2511251526102615:30CN-,mg/L0.090.060.050.040.5Cu2+,mg/L0.230.240.260.211.0Ni2+,mg/L0.320.330.210.431.0Cr6+,mg/L0.210.110.450.140.5Zn2+,mg/L0.850.960.790.543.0COD,mg/L87746660150pH8.648.868.468.496-9,mg/L2.561.631.252.4225SS,mg/L241914201508　,,。,。,,。,pH,pH。,,,。,:,。GB21900-2008《》,,,。　　　[1]　,,,.〔M〕.:,2002.73.[2]　.〔J〕.,2006,28(6):38-40.[3]　.〔M〕.:,2003.494.[4]　,.〔J〕.,2007,29(1):42-44.[5]　,.〔J〕.,2007,29(3):48-51.Sum-upReportsforElectroplatingWastewaterTreatmenttoSatisfyStandardRequirementinCheckingandAcceptingProcessGuoChongwu1　LiJianqiang1　LiangHengquan2(1.ZhaoqingCityHualiangMetallicFinishingProductsCo.,Ltd,Zhaoqing526105;2.GuangzhuoZhengbenMechanicalandElectricEquipmentsCo.,Ltd,Guangzhou,510280)Abstract　Workexperiencesforelectroplatingwastewatertreatmenttosatisfystandardrequirementweresummarized.Itispreferablethatwastewatercontainingcyanideistreatedwithbleachingwaterandhydrogenperoxidecombinedtreatmentmethod,sincethetreatmenteffectisbetterandthecostlower.Cyanidecontaininginplating-nickelwastewatercanbetreatedwithhydrogenperoxide.Butthetreatmentcan'tbecarriedoutwithbleachingwaterasoxidant,becauseNi2+ioncanbeoxidizedbysodiumhypochloritetoformNi(OH)3depositunderanalkalescencecondition.Costfortreatingcon-taining-acidwastewaterwithlimeislowerthanwithsodiumhydroxide.Builttwoneutralizingtanks,thelimewasaddedtothefirsttanktotreat90%ofwaste-acid,and,simultaneously,thelimewasaddedtothesecondtanktotreattheresiduarywaste-acid.QuantityofthelimewasautomaticallycontrolledwithpHcontrolsystemwhichwasinstalledinthesecondtank,inordertoensurecloudinessoftreatedwastewatersatisfiesstandardrequirement.Keywords　electroplatingwastewater;hydrogenperoxide;bleachingwater;treatmentmethod48　　　　　　　　　　20093