胞外聚合物对活性污泥吸附生活污水碳源的影响胡小兵1

3611201611ActaScientiaeCircumstantiaeVol．36No．11Nov．2016No．KJ2013A059SupportedbytheScienceＲesearchProjectofCollegesandUniversitiesinAnhuiProvinceNo．KJ2013A0591966—[e-mail]*[e-mail]1966—[e-mail]*[e-mail]10．13671/j．hjkxxb．2016．0134．2016．J．36114062-4069HuXBYeXZhouYKetal．2016．TheeffectofextracellularpolymericsubstancesonadsorptionofthecarbonsourceinsewagebyactivatedsludgeJ．ActaScientiaeCircumstantiae36114062-4069132*111111．2430322．2430003．2430322015-12-062016-03-162016-04-02SB-EPS、LB-EPSTB-EPS、EPSEPSCODLagergern、Ｒitchie．、-SB-LBLagergernＲitchie．EPSLB-EPSTB-EPS．SB-EPS0．650mg·mg－1、3．37mg·mg－10．0997min－1、0．0390min－1SB-EPS．TB-EPS1．06mg·mg－1、0．443mg·mg－110．7min－1、0．183min－1TB-EPS．LB-EPS．0253-2468201611-4062-08X172X703ATheeffectofextracellularpolymericsubstancesonadsorptionofthecarbonsourceinsewagebyactivatedsludgeHUXiaobing13YEXing2*ZHOUYuankai1ＲAOQiang1ZHUＲongfang1QIXiaohong1ZHONGMeiying1．CollegeofArchitecturalEngineeringAnhuiUniversityofTechnologyMa'anshan2430322．CollegeofEnergyandEnvironmentAnhuiUniversityofTechnologyMa'anshan2430003．EngineeringＲesearchCenterofWaterPurificationandUtilizationTechnologybasedonBiofilmProcessMinistryofEducationMa'anshan243032Ｒeceived6December2015receivedinrevisedform16March2016accepted2April2016AbstractToexploretheeffectsofdifferentextracellularpolymericsubstancesslime-EPSLB-EPSandTB-EPSontheadsorptioncharacteristicsoftheactivatedsludgesuchasculturedsludgeandsewagesludgetheorganicpollutantsCODadsorptioncharacteristicsofdifferentEPSlayersinurbansewagehasbeeninvestigatedthroughextractionofEPSindifferentlayersafterheating．ThereforethreedynamicalmodelshavebeenproposedtounderstandtheadsorptionprocessincludingLagergern'smonolayeradsorptionkineticsequationＲitchie'sbilayeradsorptionkineticsequationandparticlediffusionequation．Theresultsshowthattheadsorptioncharacteristicsofbothuntreatedsludgeand-SBslimeboundextracellularpolymericsubstancessludgefromtwosourceswellconformtotheLagergern'sequationandＲitchie'sequationfurtherindicatingthatbothmonolayerandbilayeradsorptionoccursintheprocessofsludgeadsorption．ThecontentofEPSgraduallyincreasesfromtheouterlayertotheinnerlayeroftheactivatedsludge．TheratioofproteintopolysaccharideintheouterlayerissmallerthanthatintheinnerlayerhowevertheratioofproteintopolysaccharideintheouterlayerforLB-EPSishigherthanthatforTB-EPSofcultivatedsludge．TheadsorbedSB-EPSinthecultivatedsludgeis0．650mg·mg－1andthatinthesewagetreatedplantisaslargeas3．37mg·mg－1．Comparedtotherawsludgetheadsorptionratesincreaseby0．0997min－1and0．0390min－1forthe10abovetwosludgesrespectively．ThereforeitcanbeconcludedthattheSB-EPScanabsorborganicpollutantswithalowadsorptionrate．TheadsorptioncapacitiesofTB-EPStightlyboundextracellularpolymericsubstancesEPSfortwosludgesare1．06mg·mg－1and0．443mg·mg－1respectively．Theadsorptionratesincreaseby10．7min－1and0．183min－1respectivelycomparedtotherawsludge．ThecompactstructureofTB-EPSresultsinalowadsorptionratebutTB-EPScanabsorbthepollutantsontheextracellularsubstanceswithoutbeingreleased．TheLB-EPScannotstorepollutantsbutitcandeliverpollutantstotheinnerlayerrapidly．Keywordsextractextracellularpolymericsubstancesludgeadsorptiondynamicsmodelcarboninwastewater1Introduction19992011．EPS50%～90%Shengetal．20102013．EPS、、、、Shengetal．2010．EPSEPSZhangetal．2014Liuetal．2015Tourneyetal．2009Wangetal．2014Liu2015EPSPbⅡ、CdⅡZnⅡEPS31587．3mg·g－1、1470．6mg·g－11123．6mg·g－1Wei2011EPSEPSCdEPSUeshima2008EPSCd．EPSEPSWei2015EPSEPSGao2011EPS4、、、EPSSheng2008、EPS、EPS-EPSEPS．EPSEPSslimeboundextracellularpolymericsubstancesSB-EPS、looselyboundextracellularpolymericsubstancesLB-EPStightlyboundextracellularpolymericsubstancesTB-EPS2013Yuetal．2007．GuoGuoetal．2015TB-EPS、、TB-EPSTB-EPS．EPS．EPS．EPSEPSEPS．2Materialsandmethods2．1A2OSBＲ．、NH4ClKH2PO4100∶5∶1．24h．．、1．3604361、Table1ActivatedsludgeandsewageindicatorsoftestandmainprocessoperationMLSS/mg·L－1MLVSS/mg·L－1SVI/mL·g－1SＲT/dDO/mg·L－1pHCOD/mg·L－1NH+4-N/mg·L－1TP/mg·L－16481597669．4255．0～7．07．0～8．0296．8616．934．2751373172112202．0～4．06．8～7．2314．5817．736．352．2EPSEPS2012EPS0．45μmEPS．Folin-EPS2005-EPS2012DNAEPSDNA2013Sunetal．1999．2．3EPSEPS41000mL500mL6000mg·L－12013Ⅰ、Ⅱ、-SB6000g5minSB-EPSpH7．00～7．50-SBSB-EPSⅢ、-LB3000r·min－110min70℃0．1mol·L－1pH=7．4PBS50℃1min6000g10minLB-EPSpH-LBLB-EPSⅣ、-TB3000r·min－110minPBS60℃30min6000g30minTB-EPSpH-TBTB-EPS．pH530minCOD300mL．600mLJJ-4150r·min－15、10、20、30、40、6090min10mLCOD．2．42．4．1EPSＲitchie2LagergernＲitchie2011．31～3．qt=qe1-exp-k1t1qt=qe1-11+k2()t2qt=k3t0．5+c3qtqetmg·g－1k1、k2LagergernＲitchiemin－1k3mg·g-1·min-0．5c．2．4．2EPSEPSEPSSB-EPS=A=qe－-SBqe/SB-EPS×MLSS1/1000LB-EPS=B=qe－-LBqe-SB-EPS×MLSS2/1000×A/LB-EPS×MLSS2/1000TB-EPS=C=qe－-TBqe-SB-EPS×MLSS3/1000×A－LB-EPS×MLSS3/1000×B/TB-EPS×MLSS3/1000MLSS1、MLSS2、MLSS3-SB、-LB、-TB．3Ｒesultsanddiscussion3．1EPSEPS1EPSLB-EPS、TB-EPS4604104．86mg·g－1．EPSDO5．00～7．00mg·L－12．0～4．0mg·L－1EPS2006DOEPSEPSLiao2001SＲTEPS．1EPSFig．1ThepictureofEPScompositiondistributionofactivatedsludgeEPSEP