混凝联合O_3_O_3_UV深度处理焦化废水的研究_雷霆

混凝联合O3、O3/UV深度处理焦化废水的研究雷霆1,赵文涛2,3,黄霞2,3,王晓昌1(1.西安建筑科技大学环境与市政工程学院,陕西西安710055;2.清华大学环境模拟与污染控制国家重点联合实验室,北京100084;3.清华大学环境科学与工程系,北京100084)摘要:采用混凝联合O3、O3/UV深度处理焦化废水的生物处理出水。试验结果表明:当混凝剂Al2(SO4)3的投量为900mg/L时,对TOC、COD、色度和UV254的去除率分别为23.2%、19.5%、33.6%和27.1%,相应的出水值分别为55.5mg/L、196mg/L、680倍和2.53cm-1。混凝出水经O3/UV深度处理的效果优于单独O3氧化的,当臭氧投量为2.8g/L、反应时间为80min、UV照射强度为30W时,对TOC、COD、色度和UV254的去除率分别达到91.8%、73.1%、96.1%和97.6%,相应的出水值分别为5.9mg/L、60mg/L、40倍和0.081cm-1,出水COD浓度达到《污水综合排放标准》(GB8978—1996)的一级标准,且大大提高了废水的可生化性。关键词:焦化废水;混凝;O3;O3/UV;可生化性中图分类号:X703文献标识码:C文章编号:1000-4602(2010)05-0100-04AdvancedTreatmentofCokePlantWastewaterbyCoagulationCombinedwithO3orO3/UVLEITing1,ZHAOWen-tao2,3,HUANGXia2,3,WANGXiao-chang1(1.SchoolofEnvironmentalandMunicipalEngineering,Xi'anUniversityofArchitectureandTechnology,Xi'an710055,China;2.StateKeyJointLaboratoryofEnvironmentalSimulationandPollutionControl,TsinghuaUniversity,Beijing100084,China;3.DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Thetreatmenteffectofbio-treatedcokeplantwastewaterusingcoagulationcombinedwithO3orO3/UVwasinvestigated.TheexperimentalresultsindicatethatwhencoagulantAl2(SO4)3dosageis900mg/L,theremovalratesofTOC,COD,colorandUV254are23.2%,19.5%,33.6%and27.1%respectively,andtheirvaluesintheeffluentare55.5mg/L,196mg/L,680timesand2.53cm-1respectively.O3/UVaftercoagulationismoreefficientinremovingpollutantsthanO3.Whentheo-zonedosageis2.8g/L,thereactiontimeis80minandUVirradiationintensityis30W,theremovalratesofTOC,COD,colorandUV254are91.8%,73.1%,96.1%and97.6%respectively,andtheirvaluesintheeffluentare5.9mg/L,60mg/L,40timesand0.081cm-1respectively.TheeffluentCODconcentrationmeetsthefirstcriteriaspecifiedinIntegratedWastewaterDischargeStandard(GB8978-1996).Thegoalofimprovingwastewaterbiodegradabilityisachieved.Keywords:cokeplantwastewater;coagulation;O3;O3/UV;biodegradability基金项目:国家自然科学基金资助项目(59738150)·100·第26卷第5期2010年3月中国给水排水CHINAWATER＆WASTEWATERVol.26No.5Mar.2010焦化废水是一种高污染、高毒性、高色度的有机工业废水,如果不经过有效处理就直接排放会严重污染