多级接触氧化法在汽车涂装废水处理中的应用

第38卷第9期2017年9月东北大学学报（自然科学版）JournalofNortheasternUniversity(NaturalScience)Vol.38,No.9Sep.2017doi：10.12068/j.issn.1005-3026.2017.09.023多级接触氧化法在汽车涂装废水处理中的应用朱玉芳1,朱彤1,UdoFienko2,马永光1(1.东北大学机械工程与自动化学院，辽宁沈阳110819;2.华晨宝马汽车有限公司，辽宁沈阳100044)摘要：汽车涂装废水具有可生化性低，化学需氧量（COD)浓度较髙的特点，采用多级接触氧化法对其进行小型实验研究.以某汽车厂经物化工艺预处理后的涂装废水为实验原水，其BOD5/COD(5日生化需氧量与化学需氧量比值）<0.1，COD质量浓度为800~1500mg/L.结果表明：多级接触氧化系统可有效降解涂装废水COD，实验系统稳定运行后，在水力停留时间为8h的条件下，系统对COD的总去除率可达80%以上；同时，系统表现出较强的抗冲击能力，处理后废水的COD质量浓度均低于500mg/L，达到了涂装车间废水排放要求.另一方面，该系统可有效降低剩余污泥的产量，结构简单，运行稳定，可大幅降低涂装废水的处理成本.关键词：多级接触氧化;涂装废水;化学需氧量;剩余污泥;水力停留时间中图分类号：X703文献标志码：A文章编号：1005-3026(2017)09-1326-05ApplicationoftheMulti-stageContactOxidationMethodinAutomobilePaintingWastewaterTreatmentZHUYu-fang1,ZHUTong',UdoFienko2,MAYong-guang1(1.SchoolofMechanicalEngineering&Automation，NortheasternUniversity，Shenyang110819，China;2.BMWBrillianceAutomotiveLtd.，Shenyang100044，China.Correspondingauthor：ZHUTong，E-mail：tongzhu@mail.neu.edu.cn)Abstract:Amulti-stagecontactoxidationsystemwasusedinabench-scaleexperimentstudytotreattheautomobilepaintingwastewater,whichhaspoorbiodegradabilityandcontainshighconcentrationofCOD(chemicaloxygendemand).Thewastewaterusedforthisexperimentistheactualpaintingwastewaterwhichhasbeenpretreatedbythephysic-chemicaltreatmentprocessinthepaintshopofsomeautomobilefactory，anditsBOD5/CODislessthan0.1，CODmassconcentrationis800〜1500mg/L.Theresultsshownthatthemulti-stagecontactoxidationsystemcanefficientlydegradetheCODofthepaintingwastewater.Aftertheexperimentalsystemkeepingrunningstably，thetotalCODremovalrateismorethan80%withthehydraulicretentiontime(HRT)of8hours.Meanwhile，thissystemhasastrongimpactresistancecapacity.TheCODmassconcentrationoffinaltreatedwastewaterislessthan500mg/L，whichcanreachthefactorydischargerequirementforthepaintshop.Besides，thissystemwithsimplestructurecanefficientlyreducetheexcesssludgeproductionandcankeeprunningstably，whichcangreatlyreducethetreatmentcostforthepaintingwastewater.Keywords：multi-stagecontactoxidation;paintingwastewat