Characteristics+of+MBR+Oily+Sludge+and+Its+Influence+on+Membrane+Fouling+under+Two+Aeration+Modes

OpenJournalofYangtzeGasandOil,2019,4,144-156http://www.scirp.org/journal/ojogasISSNOnline:2473-1900ISSNPrint:2473-1889DOI:10.4236/ojogas.2019.42011Apr.24,2019144OpenJournalofYangtzeGasandOilCharacteristicsofMBROilySludgeandItsInfluenceonMembraneFoulingunderTwoAerationModesYuanshaXie,HuiyingLiu,YanWang,JunYi,XianweiWu,MengxiaWu,JieDai*SchoolofChemistryandEnvironmentalEngineering,YangtzeUniversity,Jingzhou,ChinaAbstractAmembranebioreactor(MBR)withordinaryaeration(reactorR1)andaMBRwithmicroporousaeration(reactorR2)areconductedinparalleltoin-vestigatethecharacteristicsofoilysludgeanditseffectonmembranefouling.Theresultsindicatethattheorderofmembranefoulingratefromhightolowis:reactorR1dissolvedoxygen(DO)(1mg/L)>reactorR2DO(1mg/L)>reactorR1DO(4mg/L)>reactorR2DO(4mg/L).Membranefoulingrateisnotrelatedtooilysludgeconcentrationbuttooilysludgesedimentationper-formanceandthesmallparticleoilysludgeisthekeyfactortoaffectthemembranefouling.Thesolublemicrobialproducts(SMP)areexaminedbythree-dimensionalexcitation-emissionmatrix(3DEEM)fluorescencespectra.3DEEMspectrademonstratethatthemainorganicsubstancesoftheSMPintworeactorsaretyrosinearomaticprotein,fulvicacid-likesubstancesandsolublemicrobialproductsunderDOare1mg/Land4mg/L,respectively.Theproportionsumoffulvicacid-likesubstancesandsolublemicrobialproductsisthekeyfactoraffectingmembranefouling,andmembranefoulingacceleratesastheratioincreases.KeywordsAerationMode,MBR,3DEEM,SolubleMicrobialProduct,MembraneFouling1.IntroductionAmembranebioreactor(MBR)hastheadvantagesofhighefficiencyandflex-ibilityovertraditionalbiologicaltreatment[1][2][3],whiletheproblemofmembranefoulinggeneratedinMBRhaslimitedthepromotionofthetechnol-Howtocitethispaper:Howtocitethispaper:Xie,Y.S.,Liu,H.Y.,Wang,Y.,Yi,J.,Wu,X.W.,Wu,M.X.andDai,J.(2019)CharacteristicsofMBROilySludgeandItsInfluenceonMembraneFoulingunderTwoAerationModes.OpenJournalofYangtzeGasandOil,4,144-156.https://doi.org/10.4236/ojogas.2019.42011Received:Received:December3,2018Accepted:Accepted:April2