_铁炭微电解-Fenton氧化-生物接触氧化组合工艺处理石化废水 (1)

工业用水与废水INDUSTRIALWATER＆WASTEWATERVol．44No．2Apr.，2013周杰1，2，李孟3，刘凯敏4，王亚丽5（1.西安石油大学化学化工学院，西安710065；2.长庆油田分公司技术监测中心，西安710018；3.济南中科成水质净化有限公司，济南250100；4.长庆油田分公司第五采油厂，西安710021；5.长庆油田分公司第八采油厂，西安710021）铁炭微电解-Fenton氧化-生物接触氧化组合工艺处理石化废水摘要：采用铁炭微电解-Fenton氧化-生物接触氧化组合工艺处理石化废水，考察了不同因素对各单元废水处理效果的影响。结果表明：当铁炭质量比为1.5∶1，pH值为4.0，HRT为120min时，铁炭微电解单元出水CODCr的质量浓度为420mg/L，单级CODCr去除率为67.57%，出水m(BOD5)/m(CODCr)值由0.02~0.03升高至0.30；当H2O2投加量为3.0mL/L，pH值为3.5，反应时间为60min时，Fenton氧化单元出水CODCr的质量浓度为130mg/L，单级CODCr的去除率为72.17%，出水m(BOD5)/m(CODCr)值由0.30进一步升高至0.58。经过预处理的出水再进行生物接触氧化处理，出水CODCr的质量浓度小于20mg/L。该组合工艺对CODCr的总去除率高达98.76%，表明物化预处理-生化法组合工艺对此类可生化性较差且组成复杂的石化废水具有比较理想的处理效果。关键词：石化废水；Fenton氧化；铁炭微电解；可生化性中图分类号：X703.1文献标识码：A文章编号：%1009－2455（2013）02－0022－05Treatmentofpetrochemicalwastewaterbycombinedprocessofferric-carbonmicroelectrolysis-Fentonoxidation-biologicalcontactoxidationZHOUJie1，2，LIMeng3，LIUKai-min4，WANGYa-li5（1.CollegeofChemistryandChemicalEngineering,Xi′anPetroleumUniversity,Xi′an710065,China;2.TechnicalMonitoringCenterofChangqingOilfieldBranchCompany,Xi′an710018,China;3.Ji′nanZ.K.C.WaterPurificationCo.,Ltd.,Ji′nan250100,China;4.No.5OilProductionPlantofChangqingOilfieldBranchCompany,Xi′an710021;5.No.8OilProductionPlantofChangqingOilfieldBranchCompany,Xi′an710021,China）Abstract：Usingacombinedprocessofferric-carbonmicroelectrolysis-Fentonoxidation-biologicalcontactoxidationtotreatpetrochemicalwastewater,theeffectsofdifferentfactorsontheefficiencyofeachtreatmentunitwereinvestigated.Theresultsshowedthat:fortheferric-carbonmicroelectrolysispretreatmentunit,whenthera-tioofm(Fe)tom(C)was1.5:1,thepHvaluewas4.0,theHRTwas120min,themassconcentrationofCODCrinitseffluentwaterwas420mg/Lwiththeremovalrateof67.57%,thevalueofm(BOD5)/m(CODCr)wasincreasedfrom0.02-0.03to0.30;fortheFentonoxidationunit,whentheH2O2dosagewas3.0mL/L,thepHvaluewas3.5,thereactiontimewas60min,themassconcentrationofCODCrinitseffluentwaterwas130mg/Lwiththeremovalrateof72.17%,andthevalueofm(BOD5)/m(CODCr)wasfurtherincreasedfrom0.30to0.58.Theeffluentw