MBR处理生活污水的膜污染特征及其清洗李秀芬

MBＲ1，2，3，1，2，3，1，2，3，1，2(1．，214122;2．，214122;3．，214200)(MBＲ)，，，，。MBＲ，X(EDX)，、。，，，2．92%;，;，2%0．3%，，，CF。;;X;;;;X703A1000－4602201623－0027－042016YFC0400707—BE2014606CharacteristicsofMembraneFoulinginMBＲforTreatmentofDomesticSewageandItsCleaningLIXiu-fen12ZHOUQiang3CHENChun-mei12ZHANGLin-zhong3ＲENYue-ping12SHANGHai-bo3WANGXin-hua121．SchoolofEnvironmentandCivilEngineeringJiangnanUniversityWuxi214122China2．JiangsuKeyLaboratoryofAnaerobicBiotechnologyWuxi214122China3．JiangsuLantianPeierMembraneCo．Ltd．Yixing214200ChinaAbstractMembranebioreactorMBＲtechnologyhasbeenextensivelyusedindomesticandin-dustrialwastewatertreatmentplants．HowevermembranefoulingstillisoneofthekeyproblemslimitingthestableoperationofMBＲandthekindsoffoulantson/inmembranesurfaceandthecleaningstrate-giesareheavilydependentontheseasons．Aimedatfouledmembranefromdomesticsewagetreatmentplanttheinfluenceofchemicalcleaningstrategiesoncleaningefficiencywasinvestigatedbasedonthea-nalysisoffoulingelementsbyenergydispersiveX-rayspectroscopyEDX．Theresultsshowedthatele-mentson/infouledmembranesurfaceinautumnweremostcomplicatedandorganicelementsoverlappedwithinorganicelements．AmonginorganicelementsthepercentageofFewasthehighestwith2．92%．Organicelementscouldbeeffectivelyremovedbysodiumhypochloritewhileinorganicelementscouldbe·72·3223201612CHINAWATEＲ＆WASTEWATEＲVol．32No．23Dec．2016removedbyoxalicacidthemosteffectively．Comparedwiththealkalinecleaningfollowedbyacidthecleaningmethodof2%oxalicacidfollowedby0．3%sodiumhypochloritewasbetter．Bothmembranefluxandaverageporesizewerefinallyrecovered．ComparedwithnewmembranetheelementsoncleanedmembranesurfacewerethesamewithonlyCandFelementsdetected．KeywordsmembranebioreactorMBＲmembranefoulingenergydispersiveX-rayspec-troscopyelementcomponentsonmembranesurfacecleaningoxalicacidsodiumhypochlorite50MBＲ＞10000m3/dMBＲ12。MBＲ3～56。。MBＲXEDX、MBＲ。11.11。1Fig．1Digitalphotographsofnewandfouledmembranes0．8m2。COD200～450mg/LBOD5200～300mg/L40～50mg/L3mg/L《》GB8978—1996。30%。PVDF0．104μm。33．2cm2。1.2500mL、13h5h1h。1、Tab．1Compositecleaningstepsofsodiumhypochloriteoxalicacidandultrasound1231NaClO—2NaClO—3NaClO4NaClO1.3、78EDX。22.12。4、7、10、1、、、20±5、30±5、22±5、11±5℃。CF48．05%51．95%。CFO、Cl、CaCa0．70%。·82·3223．watergasheat．comO11．82%Al、FeCa9．90%Fe8．32%。O23．90%5．20%NNa、Mg、Al、FeCa9．25%Fe。N、OCl12．28%。、、F45．80%、44．40%、6．37%14．59%。2Tab．2Elementsonfouledmembranebydomesticsewageindifferentseasons%47101C42．2530．0545．1752．70N——5．206．33O10．4211．8223．9010．01F45．8044．406．3714．59Cl0．82—1．423．63P—3．831．88—S——1．77—Si——5．040．46Na——1．312．39Mg——0．34—Al—1．082．090．59Fe—8．322．92—K———1．28Cu———6．35Ca0．700．502．591．67。2.22000L/m2·h502L/m2·h75%。0．104μm0．051μm。2.3。0．5%pH13．75。。pH。pH2Cl2pH2～3Cl2HClOpH4～5HClOCl2pH5～8HClONaClOpH9NaClOClO－、HClOCl2pH。9。pH8～10。pH89241%247%pH10206%pH10NaClO。pH80．3%pH8。2.4、。0．5%pH1．62。Ca、MgBa。Fe、Cu、NiCo。10。0．5%2%105%2%·92·．watergasheat．com，:MBＲ3223。2.5364%332%23512291L/m2·h。Fe3+、Fe2+、Ca2+、Mg2+Al3+18．5、5．22、3．0、2．414．6Fe3+＞Al3+＞Fe2+＞Ca2+＞Mg2+。。8。2%0．3%pH8。2.6。。EDXCF。3①MBＲ0．70%Ca。75%Fe2．92%。②0．3%pH82%。。③2%pH80．3%。1JuddS．TheMBＲBookPrinciplesandApplicationsofMembraneBioreactorforWaterandWastewaterTreat-mentM．OxfordElsevier2011．2．J．201531534－39．3．MBＲJ．201632714－23．4ZhuXWangZWuZ．Characterizationofmembranefoulantsinafull-scalemembranebioreactorforsuper-marketwastewatertreatmentJ．ProcessBiochem20114641001－1009．5．J．2013343950－954．6LiXFLiJGFuXQetal．ChemicalcleaningofPSultrafiltersfouledbythefermentationbrothofglutamicacidJ．SepPurifTechnol200542181－187．7．J．201333582－86．8．J．201535687－92．9．J．200739912－14．10．J．201534182－87．1968－。[e-mail]2016－08－28·03·3223．watergasheat．com