聚乙烯醇—海藻酸鈉固定銅綠微囊藻對磷的吸附研究.pdf

1、湖南大學碩士學位論文聚乙烯醇－－海藻酸鈉固定銅綠微囊藻對磷的吸附研究姓名：賁月申請學位級別：碩士專業(yè)：環(huán)境工程指導教師：劉云國；朱丹201206AbstractWitha’seriesofexperimentsonMicrocystisaeruginosagrowthcharacteristicsandonphosphorusremovalbyimmobilizedMicrocystisaeruginosa，togetherwithan

2、alysisoftheexperimentalresults，thestudyconcludedtheoptimumembeddingcondtionforimmobilizationandfactorswhichhadeffectsonphosphorusremovalBesidesmechanismofphosphorusremovalbyimmobilizedalgaewasgenerallypresentedinthisdiss

3、ertationTheresultsdemonstratedthatthegrowthrhythmofimmobilizedMicrocystis口P，“2f”os口wassimilartothatoffreeoneBothofthemconformtoLogisticgrowthcurveImmobilizationcausedadaptivechangesofthealgea’ShabitatSOthatMicrocystisaer

4、uginosacouldremainactiveandthefinalyieldwashigherthanfreecellsTherefore，theinfluenceofimmobilizationtoMicrocystisaeruginosawaspositiveAfteranorthogonalexperiment，theoptimalpreparationconditionsofimmobilizedmicrobespellet

5、swerefinallyconcludedasfollowing：themassfractionofpolyvinylalcoholandsodiumalginatewere6％andO5％respectivelyandtheconcentrationofMicrocystisaeruginosawasapproximately2x107cells／mLUnderthisconditiontheadsorptionrateofimmob

6、ilizedmicrobespelletscouldreach7417％，whichwas134timeshigherthanthatofPVA—SAgelballThequalityofsodiumalginatehasthegreatestimpactofpolyvinylalcoholrankedthesecondonphosphorusremovalandthemassfractionTheoptimalrangeofiniti

7、alpHfordephosphorizationbyimmobilizedmicrobespelletswasfrom6to8，andthebestpHvaluewas7Comparedwiththefreealgae，ImmobilizedalgaecantoleratethemorewiderangeofpHInthepreliminarystageoftheexperiment(fromfirsttoseconddays)，pho

8、sphorusremovalofimmobilizedballWasmainlydependedonadsorptionofcarriers，andthreedayslaterMicrocystisaeruginosabegintotakeuseofthephosphorusfromsewagetosynthesisofnucleicacidtomeetthemselves，atthesametimecanstorethephospho

9、rusofsurroundingenvironmentThetoleranceofimmobilizedalgaeonphosphorusconcentrationrangefrom010to100mgL一，whichwasmoresuitableforadvancedtreatmentofthesewagetreatmentMicrocystisaeruginosaplaysakeyroleintheprocessofphosphor