含藻水源水生物預處理水質凈化技術研究.pdf

1、東南大學碩士學位論文含藻水源水生物預處理水質凈化技術研究姓名：范超文申請學位級別：碩士專業(yè)：環(huán)境工程指導教師：朱光燦20090531東南人學碩七學位論文StudyoilBiologicalpretreatmenttechnologyforpurificationofsourcewatercontainingalgaeAbstractAlgalmetabolitesandtraceorganicpollutantsineutrophics

2、ourcewatercallhardlybeeffectivelyremovedbyconventionalprocess，thuscanseriouslyaffectethequalityofdrinkingwaterBio—contactoxidationasoneofpretreatmenttechnologyofdrinkingwaterisveryefficient，safeandreliablePilottestismade

3、onthedegradationperformanceandmechanismoftaihusourcewaterbyBiocontactoxidationtechnologymekindsoffillersandtwokindsofdifferentreactorsareusedinthistestThefollowingresultsareobtained：Thereactorwhichusingelastfillerislesse

4、銜cientthanthosetworeactorsSuspendedsolidssuchasalgaeinrawwatercallbeentrappedeffectivelybysuspendedballfillerreactorwhiledissolvedmatterssuchasammonianitrogen，DOC，BDOCetccanberemovedbycombinedfillerreactorPlugflowreactor

5、showsamuchbetterpurificationeffectthancontinuousflowstirredtankreactorStudyonthebiofilmbiomassandbiologicalactivityshownsthatbiomassonplug—flowreactorbiofiimislOSSthanthatonthecontinuous—flowstirredtankreactor，butbiologi

6、calactivityishigherthanthat；thebiomassandbiologicalactivityonthefirstorderoftheplugflowreactorishigherthanthesecondandthirdorder。ConventionalprocesscanhardlyremoveammonianitrogenandnitritenitrogensmalJmoleculeorganicsand

7、algaetoxininsourcewaterandflocculation—sedimentationmayevenIcadtothedissolutionofintracellularmicrocystinsBiologicalpretreatmentcaneffectivelystrengthenconventionalprocess，raisingtheremovalrateofammonianitrogenandnitrite

8、nitrogen，efficientlyremovingsmallmoleculedissolvedorganic，smallalgaeandalgaetoxinwhichconventionalprocesscanhardlydoStudiesonparticlesizedistributionandmolecularweightdistributionshownsthatbiologicalpretreatmentcalleffec

9、tivelyremovesmallsizeparticlesinrawwaterandincreasethenumberoflargesizeparticlesthusimprovingtheeffectofcoagulationsedimentationandcoagulationflotation；anditcalldecompositemacromoleculestosmallmoleculesandremoveitTheconc

10、entrationofatrazineinsourcewaterfromnanquaninTaihuisabitlowaboutI26ng／LandtheconcentrationofThreephthalateestersDimethylPhthalate(DMP)，Di(2ethylhexyl)Phthalate(DEHP)andDi—nbutylPhthalate(DnJBP)is561嵋?guī)祝?13斗g／L，240嵋／Lrespe

11、ctively1nheconcentrMionoftoataiPAHsis2151pg／L，farlyexceededcriterionofPAHs20IIg／LChloroforlnprecursorsconcertrationcanreachupto888pg／L，whiletheCarbontetrachiorideprecursorsconcertrationisonlyabout065腿幾，indicatingthatsour

12、cewaterofnanquaninTaihuisseriouslycontaminatedbyChloroformprecursorsandPAHsPlugflowbiologicalpretreatmentreactorhasasatisfactoryremovaltoatrazine，DMP，DEHP，DnBPandchloroformprecursorstheremovalrateis575％、786％、523％、853％、55

13、7％respectively；whileithasarelativelylowremovalratetotatalPAHsandarbontetrachlorideprecursorsAttwohour’sHydraulicRetentionTime(HRT)HRT，theremovalrateofmostpollutantsisgood，tooshortHRTisnotconductivetotheremovalofpollutant

14、sConclusionsdemonstratedthatbiologicalpretreatmentcarleffectivelyenhancedtheeffectofconventionnalpurificationprocess，andhasasatisfactoryremovaltoammoniani仃ogen，algae，cyanobacteriatoxinandmicroorganicpollutants。Thusitisah