沸石填料BAF和组合填料BAF启动挂膜对比试验英文孙兴滨

28220124JournalofHarbinUniversityofCommerceNaturalSciencesEditionVol．28No．2Apr．20122011－07－01．20090240820070420882LBH－Z06115200909055．1970－．Comparativeexperimentalresearchonstart－upofbiologicalaeratedfilterwithzeolitefillerandcombinedpackingSUNXing-bin12PANHua-yin1SUNYong-feng1CUIFu-yi2ZHAOZhi-wei21．DepartmentofEnvironmentalScienceNortheastForestryUniversityHarbin150040China2．SchoolofMunicipalandEnvironmentalEngineeringHarbin150090ChinaAbstractThestart－upofBiologicalAeratedFilterBAFwascomparedbyzeoliteandzeolite－biochemicalcottoncombinedpacking．Theflowdirectionwasupflow．ThefilterwasfilledwithactivatedsludgeandoxygenwassuppliedbytheaircompressorandtheprimaryclarifiereffluentandthesecondaryclarifiereffluentofawastewatertreatmentplantwerefedtothedifferentBAFswithincrementalflowrateoffeedwateruntilthemediaofBAFswerecoveredwithstablebiofilm．Theresultsshowedthatthestart－upofBiologicalAeratedFilterwassuccessfulafter33days．Intheconditionsofthetemperaturewas16～24℃HRTwas1handDOwas6mg/LtheremovalrateofCODMnandNH4+—NonzeoliteBAFwas27%and84%．Theremovalofzeolite-BiochemicalCottonfillerBAFwasbestwhichwas32%and92%．Keywordsfillerbiologicalaeratedfilterstart－upX703A1672－0946201202－0171－04BAFBAF12崟11221．1500402．150090．．33d16～24℃HRT1hDO6mg/LBAF27%84%BAF32%92%．BiologicalAeratedFilterintegratedvariouspuri-ficationfunctionssuchasfiltrationadsorptionandbi-ologicalmetabolismwhichhasmanyadvantagesforinstancesmallfloorareabettereffluentqualitysim-pleflowlittleinfluenceonenvironment1．IntheU-nitedStatesandJapantherearemorethan50BAFtreatmentfacilitiesputintooperationearlyin1990s．theapplicationofBiologicalAeratedFilterinfeedwa-tertreatmentisbeingaresearchhotspot2－3．ThefilleristhecorepartinBiologicalAeratedFilteranditssurfacestructurephysicalandchemi-calpropertiesareveryimportanttoattachedgrowthMicroBiologics4－6．AtpresentresearchmembersfromdomesticandabroadstudyonthesinglepackingBiologicalAeratedFiltermorethancombinedpack-ing．Inthispaperwewillanalysisonstart－upofbio-logicalAeratedFilterwithzeoliteandzerlite－Bio-chemicalcottonfillerandexplorethepollutantre-movalcharacteristicoftwofillersduringstart－up．1Materialsandmethods1．1ExperimentaldeviceandmaterialsTheBAFreactorisprocessedintocolumnarstructurewithplexiglassthatitswallthicknessis5mmtheinnerdiameteris30mmandtheheightis1500mm．Twofillersareusedbyparalleloperation．1#columnarcontains2～3mmzeolitefillerthethicknessis600mmandthereisasamplingportlo-catedevery200mm．Thethicknessoffiltersupport-ingbedis100mm．2#columnarcontainscombinedpackingthemiddleofupperlayerandlowerlayerisseparatedbytheporousplate．Theheightof2～3mmzeolitefillerintheupperlayeris300mmandthereisa100mmgravelfiltersupportingbedatthebot-tom．Thesuspendedfillerisinthelowerlayer．TheexperimentaldeviceisshowninFigure1．Figure1Experimentaldevice①Watertank②Peristalticpump③Airpump④Overflowport⑤Backwashingeffluent⑥Effluentport⑦Samplingport⑧Backwashinginfluent1．2MeasurementitemsandmeasurementitemsandmethodsNH4+—NCODMnweredeterminedaccordingtostandardmethods．ThepHDOandtemperatureweremeasuredbythedissolvedoxygeninstrument.1．3Start－upprocessTheexperimentadoptedthemethodofcompoundstart－upwithinoculumsofpollutedsurfacewater．thedirectionofinfluentwasupflow．Firstfilledtheex-perimentalequipmentwithactivatedsludgethenonlyaerated．Changedsmallflowinfluentafteronlyaera-tedcontinuouslyforsixdayschangingthewatereverythreedaysAndgraduallyincreasethewaterflowtothedesignflow．Intheconditionsofthetemperaturewas16～24℃HRTwas1handDOwas6mg/Lletmicroorganismsgraduallyadaptinfluentquality．Dur-ingstarting－uppermanganateindexandammonianitrogenweremeasuredeveryday．WaterqualityoftestsamplewasshowninTable1.Table1WaterqualityoftestsampleNH4+—N/mg·L－1CODMn/mg·L－1pHθ/℃UV25412～1314～156．5～7．520～27℃0．335～0．4632Resultanddiscussion2．1RemovaleffectofCODMnAscanbeseenfromFigure2and3CODMnofinfluentwasinthe14～15mg/Lafter5dayssinceBAFprocesshadbeenstarting－upCODMnofefflu-entin1#and2#was11．57mg/Land11．48mg/Lre-spectively．Itshowedthatbiofilmonthezeolitewasnotmatureatthisstagetheremovaleffectmainlyde-pendedonzeoliteadsorption．Butthisadsorptionwaslimited．Previousstudyshowedthatzeoliteonlyre-movedlargermolecularorganicsofnaturalwaterithadbadremovaleffectonsmallmolecularorganics．Theremovalratein2#washigherthan1#thereasonthatbesideszeoliteadsorptionintheupperlayersus-pendedcarrierinthelowerlayeralsoplayedaroleininterception．InthefifteenthdayremovalrateofCODMnrespectivelyreached22%and26%itshowedthatheterotrophicbacteriahadbeenamassgrowthandplayedaroleinthedegradationoforganiccom-pounds．In33thdaytheremovalratewas27%and32%respectivelyindicatedthatquantityofhetero-trophicbacteriawasthemaximumandstable．Biofilmhadbeenmaturityexceptthatthedegradationofper-manganatemicroorganismflcosofthebiofilmalsore-ducedthegapbetweenfillsplayedadsorptionandfil-trationonorganicinthewater．·271·282．2RemovaleffectofNH4+—NRemovaleffectofNH4+—Nof1#reactorand2#reactorduringstarting－upwereshowninFigure4and5．Whentheaverageconcentrationofinfluentammonianitrogenwas12．2mg/Ltheconcentrationofeffluentammonianitrogenwas8．7mg/Land8