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两级AO-混凝沉淀工艺处理树脂废水.docx

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两级AO-混凝沉淀工艺处理树脂废水 Abstract Inrecentyears,thetreatmentofresinwastewaterhasbecomeasignificantenvironmentalchallengeduetoitshighconcentrationoforganicmatterandcolor.TheAOprocess,ananaerobicandaerobicprocess,isoneofthewidelyusedmethodsforthetreatmentofwastewater.Theobjectiveofthispaperistodiscussthetwo-stageAOprocessfortreatingresinwastewater.Thearticlewillprovideanin-depthanalysisoftheprocess,includingthechemistryinvolved,operationalparameters,advantages,limitations,andchallenges. Introduction Resinwastewaterisoneofthemostcomplexwastewaterscommonlyfoundinthemanufacturingindustry.Itcontainsasignificantamountofresinandsolvents,whichmakeitdifficulttotreat.Conventionalwastewatertreatmenttechnologieslikebiologicaltreatment,physicalandchemicalmethodshavelimitationsintreatingwastewaterwithhighorganicmatter.TheAOprocesshasemergedasaviablealternativeforthetreatmentoforganic-richwastewater. Two-stageAOprocessfortreatingresinwastewater TheAOprocessinvolvestwostages–theanaerobicstageandtheaerobicstage.Intheanaerobicstage,microorganismsbreakdownthecomplexcompoundsinthewastewaterintosimplerorganiccompounds,releasingbiogasasaby-product.Intheaerobicstage,theorganiccompoundsarefurtheroxidizedintocarbondioxideandwater.Thetwostagesarecrucialforthetreatmentoforganic-richwastewater. ThefirststageoftheAOprocesstypicallyrunsfor3-6hours,dependingonthetypeandstrengthofthewastewater.Duringthisstage,thewastewaterismixedwithanaerobicmicroorganismsintheabsenceofoxygen.Anaerobicmicroorganismsbreakdowncomplexorganiccompoundslikeproteinsandcarbohydratesintosimplercompoundslikecarbondioxide,methane,andhydrogen.Thebiogasproducedduringthisstagecanbeusedasfuelforthetreatmentsystem. InthesecondstageoftheAOprocess,thewastewateristransferredtoanaerobicreactor,andairisintroducedtosupplyoxygentotheaerobicmicroorganisms.Thisstagelastsforabout4-8hours.Theaerobicmicroorganismsusetheoxygentooxidizetheremainingorganiccompoundsinthewastewaterintocarbondioxideandwater.Theeffluentfromthesecondstagemeetsthedischargecr