石化废水深度处理及脱盐的中试研究_陈洪斌

中国环境科学2009,29(9)：929~934ChinaEnvironmentalScience石化废水深度处理及脱盐的中试研究陈洪斌1*,朱冠楠1,张东宇2,唐贤春1,何群彪1,丰德新2(1.同济大学环境科学与工程学院,污染控制与资源化研究国家重点实验室,上海200092；2.中国石油华北石化公司,河北任丘062552)摘要：针对石化行业污水回用处理设施很快失效的现状,开发了“集成式悬浮载体生物氧化－砂滤－臭氧活性炭处理－超滤反渗透”的组合工艺对炼油厂外排水进行深度处理.连续7个月的中试结果表明,处理后外排水中COD、NH3-N、BOD5、油和浊度等均优于回用水标准,可作为工业循环冷却水、绿化用水和办公等用水;常规深度处理的出水经过超滤反渗透处理后,电导率稳定在35~40µS/cm,可作为动力车间的新鲜水,不会发生膜污染和堵塞问题.尽管外排水的水质波动很大,但是组合工艺运行稳定、可靠,具有突出的抗冲击性能.关键词：含油废水；深度处理；脱盐；集成式悬浮载体生物氧化中图分类号：X703.5文献标识码：A文章编号：1000-6923(2009)09-0929-06Pilotstudyonoilrefinerywastewateradvancedtreatmentanddesalination.CHENHong-bin1*,ZHUGuan-nan1,ZHANGDong-yu2,TANGXian-chun1,HEQun-biao1,FENGDe-xin2(1.StateKeyLaboratoryofPollutionControlandResourceReuse,CollegeofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China；2.HuabeiPetrochemicalCompany,ChinaNationalPetroleumCorporation,Renqiu062552,China).ChinaEnvironmentalScience,2009,29(9)：929~934Abstract：Asoilrefinerywastewateradvancedtreatmentdevicesgraduallylosttheirfunctiononeortwoyearsafteroperatedinsomepetrochemicalcompanies,acombinedadvancedtreatingprocessof“integratedsuspendedcarrierbiologicaloxidation,sandfiltration,ozone-biologicalactivatedcarbonfiltration”anddesalinationprocessof“ultrafiltrationandreverseosmosis(UF+RO)”weredeveloped.Seven-monthpilot-testshowedthatmaincontaminantsofoutletintheadvancedtreatmentplantscouldberemovedthoroughly,COD,NH3-N,BOD5,oilandturbidityofthereclaimedwaterwerebetterthanthestandardofreclaimedwater;furthermore,thedesaltedwaterhadtheelectricconductivityof35~40µS/cmduringtherunningofUFandROwhichcouldbeusedasfreshwaterofpowerworkshop.Duringthepilottest,thepollutionandcloggingofthemembranesofUFandROhadnothappened.Thecombinedadvancedtreatingprocesscouldresisttheloadingshockingandkeephighremovingefficiencyandstablerunning.Keywords：oilrefinerywastewater；advancedtreatment；desalination；integratedsuspendedcarrierbiologicaloxidation近年来,炼油及石化废水的深度处理和回用研究受到重视,一些炼油企业对现有废水处理系统进行技术改造,增加深度处理功能,使污水回用进入生产性应用阶段[1-9].但调研发现,一部分石化企业的污水回用设备运行一段时间后,出现回用水水质变差的现象