曝气生物滤池处理石油采出水的动力学特性研究_英文_苏德林
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2020-03-08 18:01:41
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Chin.J.Chem.Eng.,15(4)591—594(2007)KineticPerformanceofOil-fieldProducedWaterTreatmentbyBiologicalAeratedFilter*SUDelin(苏德林)a,WANGJianlong(王建龙)b,**,LIUKaiwen(刘凯文)bandZHOUDing(周定)aaDepartmentofEnvironmentalScienceandEngineering,HarbinInstituteofTechnology,Harbin150090,ChinabLaboratoryofEnvironmentalTechnology,InstituteofNuclearandNewEnergyTechnology,TsinghuaUniversity,Beijing100084,ChinaAbstractThebiologicalaeratedfilter(BAF)wasusedtotreattheoil-fieldproducedwater.Theremovaleffi-ciencyforoil,COD,BODandsuspendedsolids(SS)was76.3%—80.3%,31.6%—57.9%,86.3%—96.3%and76.4%—82.7%,respectivelywhenthehydraulicloadingratesvariedfrom0.6m·h-1to1.4m·h-1.Thegreatestpartofremoval,forexamplemorethan80%ofCODremoval,occurredonthetop100cmofthemediainBAF.Theki-neticperformanceofBAFindicatedthattherelationshipofBODremovalefficiencywiththehydraulicloadingratesinbiologicalaeratedfilterscouldbedescribedbycr/ci=1-exp(-2.44/L0.59).ThisequationcouldbeusedtopredicttheBODremovalefficiencyatdifferenthydraulicloadingrates.Keywordsbiologicalaeratedfilter,kinetics,oilfieldproducedwater,wastewatertreatment1INTRODUCTIONBiologicalaeratedfilter(BAF)isanalternativetothetraditionalactivatedsludgeprocesscommonlyusedinbiologicalwastewatertreatment.Itisreliedonattachedgrowthofbiomassonmedium,whichissta-tionaryduringnormalaeratingoperation[1—3].BAFcanbeusedatvariousstagesofwastewatertreatment.BAFscontainagranularmediumthatprovidesalargesurfaceareaperunitvolumeforbiofilmdevelop-ment[4].Theattachedgrowthoninertgranularme-diuminBAFallowsformuchhigherconcentrationofactivebiomassthaninasuspendedgrowthactivatedsludgesystemsothatthesizeofreactorcanbere-duced.Inaddition,themediumalsoallowsthereac-torstoactasdeep,submergedfiltersandincorporatesuspendedsolidsremoval.TheBAFprocesshasanumberofprimaryadvan-tageswhichconferbenefitsfortheadaptationofthistechnologyinseveralareas[5—11].Theprimaryad-vantageofBAFisbiologicaltreatmentandsolidsseparationinthesamereactor,eliminatingtherequire-mentforseparatesecondaryclarification.A
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