用循环曝气生物滤池工艺处理炼油碱渣废水_谢文玉

第59卷第1期化工学报Vol.59No.12008年1月JournalofChemicalIndustryandEngineering(China)January2008研究论文用循环曝气生物滤池工艺处理炼油碱渣废水谢文玉1,2,钟理1,陈建军3,钟华文2(1华南理工大学化工与能源学院,广东广州510640;2茂名学院化工与环境工程学院,广东茂名525000;3苏州大学化学化工学院,江苏苏州215123)摘要:采用新型的两级循环曝气生物滤池工艺,对稀释中和后的炼油碱渣废水进行生物处理工业试验。研究了溶解氧质量浓度、水力停留时间、营养物质、pH值、温度和反冲洗周期等因素对碱渣废水生物处理效果的影响。在适宜的操作条件下,炼油碱渣废水经两级生物处理后,COD、硫化物、挥发酚和石油类平均去除率分别达到89.3%、99.8%、93.6%和85.7%,其中COD和硫化物的平均去除负荷分别达到8.37kg·m-3·d-1和4.44kg·m-3·d-1。循环曝气生物滤池是一种高负荷、高效率、反冲洗周期长和低成本的炼油碱渣废水处理方法,具有良好的应用前景。关键词:循环曝气生物滤池;碱渣废水;炼油厂;生物处理中图分类号:X703文献标识码:A文章编号:0438-1157(2008)01-0214-07TreatmentofspentcausticwastewaterfrompetroleumrefineryusingcirculatingbiologicalaeratedfilterprocessXIEWenyu1,2,ZHONGLi1,CHENJianjun3,ZHONGHuawen2(1SchoolofChemicalandEnergyEngineering,SouthChinaUniversityofTechnology,Guangzhou510640,Guangdong,China;2CollegeofChemicalandEnvironmentalEngineering,MaomingUniversity,Maoming525000,Guangdong,China;3SchoolofChemistryandChemicalEngineering,SuzhouUniversity,Suzhou215123,Jiangsu,China)Abstract:Thespentcausticwastewaterfrompetroleumrefinerycontainshighconcentrationsulfide,phenolandoilpollutants.Anoveltwostagecirculatingbiologicalaeratedfilter(CBAF)wasusedtotreatthewastewaterafterdilutionbywaterandneutralizationbyH2SO4.Thefactorsofdissolvedoxygen(DO)concentration,hydraulicretentiontime(HRT),nutrient,pHvalue,temperatureandbackwashingcycle,whichaffectedthetreatmentefficiencyofspentcausticwastewaterwereinvestigated.TheexperimentalresultsshowedthattheaverageremovalpercentagesofCOD,sulfide,volatilephenolandoilpollutantswere89.3%,99.8%,93.6%and85.7%,respectivelyunderfeasibleconditions.TheaverageremovalloadingratesofCODandsulfidepollutantswere8.37kg·m-3·d-1and4.44kg·m-3·d-1,respectively.TheexperimentalresultsalsoshowedthattheCBAFprocesswasakindofhighloadingrate,hightreatmentefficiency,longbackwashingcycleandlowcosttreatmentprocesswithagoodapplicationprospectforthetreatmentofspentcausticwastewaterfrompetroleumrefinery.Keywords:circulatingbiologicalaeratedfilter;spentcausticwastewater;petroleumrefi