Treatment of pha_省略_gulation process_Bukuru Godefroid

ArticleID:1001-0742(2006)03-0459-05CLCnumber:X703Documentcode:ATreatmentofpharmaceuticalwastewatercontainingrecalcitrantcompoundsinaFenton-coagulationprocessXINGMei-yan*,DENGCan,BukuruGodefroid,YANGJian(CollegeofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China.E-mail:xmy_1977@163.com)Abstract:TheadvancedtreatmentusingintegratedFenton'sreactionandcoagulationprocesswasinvestigatedinthisstudy.Beforetheadvancement,thepharmaceuticalwastewatercontaininglincomycinhydrochloridewaspretreatedbyUASB(upflowanaerobicsludgebed)andaSBR(sequencingbatchreactor)process.Theresidualrecalcitrantcompounds,measuredbygaschromatography-massspectrometry(GC-MS),mainlyconsistedofalcohols,phenols,andnitrogenousandsulfurcompounds.TheexperimentalresultsindicatedthatwhentheFenton’sreactionwasconductedatpH=3.0,H2O2/CODCr=0.27,H2O2/Fe2+=3∶1and30minofreactiontime,andthecoagulationprocessoperatedatasulfatealuminumconcentrationof800mg/LandpHvalueof5.0,thecolorandCODinthewastewaterdecreasedby94%and73%,respectively;withafinaleCODconcentrationof267mg/Landcolorlevelof40units,meetingthesecondarystandardofGB8978-1996forindustrialwastewater.Keywords:pharmaceuticalwastewater;GC-MS;recalcitrantcompounds;Fenton'sreaction;coagulationprocess;advancedwastewatertreatment*CorrespondingauthorJournalofEnvironmentalSciencesVol.18,No.3,pp.459—463,2006ISSN1001—0742CN11—2629/XIntroductionAntibioticsarewidelyusedinhumanandveterinaryapplication.NanyangPukangGroupChemicalPharmaceuticalFactorylocatedinHenanProvinceinChina,mainlyproduceslincomycinhydrochlorideandchloramphenicolantibiotics.Theprocessusedtoproducetheseantibioticsincludesfermentation,extractionandpurification.Thewaste-waterfromtheantibiotics-producingfactorywascharacterizedtohavecomplexcompositions:recalci-trantorganicsgeneratedbymicrobialmetabolismsandsmallamountofantibiotics(lincomycinhydrochlorideetc.).Generally,thesecondarystandardsaredifficulttoachievewhentreatingsuchkindofwastewaterusingconventionalbiologicaltreatmentprocesses,because