A_O_O生物流化床处理焦化废水中酚类组成及降解特性分析_张伟(1)

第4卷第2期环境工程学报Vol.4,No.22010年2月ChineseJournalofEnvironmentalEngineeringFeb.2010A/O/O生物流化床处理焦化废水中酚类组成及降解特性分析张伟1韦朝海1,2＊彭平安1任曼1(1.中国科学院广州地球化学研究所珠江三角洲污染与控制研究中心,广州510640;2.华南理工大学环境科学与工程学院,广州510006)摘要为了研究实际焦化废水处理工程中酚类污染物的组成及降解特性,实验中采用HLB小柱固相萃取水样,GC-MS选择性离子扫描方法检测环境中15种酚类污染物,除苯酚的平均回收率为72.6%以外,其他14种酚类的回收率在87.6%～102.3%之间,平行测定标准偏差均小于7.62%,能够满足环境中酚类污染物测定的需要。实验结果表明,焦化废水中含有高浓度的苯酚、甲基酚和萘酚,同时存在微量的氯酚和硝基酚。在生物流化床A/O/O组合工艺处理焦化废水的过程中,厌氧阶段高浓度酚类(苯酚、甲基酚和萘酚)、氯酚类去除率分别为29.3%和31.6%;一级好氧阶段分别为99%和92.4%;二级好氧阶段分别达到89%和6%;最终出水中酚类污染物浓度0.045mg/L,满足钢铁行业废水达标排放要求。关键词焦化废水酚类污染物生物降解中图分类号X703.1文献标识码A文章编号1673-9108(2010)02-0253-06ComponentsanddegradationcharacteristicsanalysisofphenolsincokingwastewaterinbiologicalfluidizedbedA/O/OprocessZhangWei1WeiChaohai1,2PengPing'an1RenMan1(1.PearlRiverDeltaResearchCenterofEnvironmentalPollutionandControl,GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences,Guangzhou510640,China;2.CollegeofEnvironmentalScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou510006,China)AbstractForstudyingonthecompositionanddegradationcharacteristicofphenolsinprocessofcokingwastewatertreatment,phenolswereextractedthroughHLBsolidphaseextraction(SPE)cartridgeand15kindsofphenolswereanalyzedbyGC-MSselectiveionscanningmethodinthisresearch.Theresultsshowedthataveragerecoveryrateof14kindsofphenolsrangedfrom87.6%to102.3%whiletherecoveryrateofphenolwas72.6%,andtherelativestandarddeviationswerelessthan7.62%,whichcouldmeetthestandarforphenolsdetectionintheenvironment.Theresultsindicatedthatphenol,methylphenolsandnaphthols,withhighconcen-tration,exsistedincokingwastewater,andasmallquantityofchorophenolsandnitrophenolswasalsoinsideit.IntheprocessofcokingwastewatertreatmentbybiologicalfluidizedbedA/O/O,theremovalrateofhighcon-centrationphenols(phenol,methylphenolsandnaphthols),chorophenolswas29.3%and31.6%respectivelyduringanaerobicstage;99%and92.4%respectivelyinfirstaerobicstage,89%and6%respectivelyinsecondaerobicstage.Theconcertrationofthefinaleffluentwas0.045mg/L,whichmetthenationaldischar