MFC强化同步短程硝化反硝化工艺的启动贾璐维

94Vol．9No．420154ChineseJournalofEnvironmentalEngineeringApr．2015MFC*710064MFC、MFC。MFCMFCA/O。15dMFC。21MFC0．3mg/L15．9mg/L0．6mg/L95%50%COD85%。MFCpH。A/OX703．1A1673-9108201504-1831-06Enhancedstart-upofsimultaneousshort-cutnitrificationanddenitrificationwithmicrobialfuelcellJiaLuweiZhaoJianqiangHuBoZhaoHuiminHuangNanSchoolofEnvironmentalScienceandEngineeringChang’anUniversityXi’an710064ChinaAbstractMicrobialfuelcellMFCcanachievedenitrificationshort-cutdenitrificationandsimultaneousnitrificationanddenitrificationinthecathodemeanwhilegenerateelectricity．Howevertodatesimultaneousshort-cutnitrificationanddenitrificationprocessinthecathodeofMFChasnotbeenreported．Inordertostudytheperformancesofsimultaneousshort-cutnitrificationanddenitrificationprocessinthecathodeofMFCadual-chamberaerationbio-cathodeMFCwascombinedwiththeA/Obiologicalnitrogenremovalprocesstotreatsyn-theticlowC/Nratiowastewater．Whennitriteaccumulationandammonia-oxidizingbacterialenrichmentwerea-chievedinthecathodeoftheMFCafteraone-timefeedingcultivationfor15daysthereactorwasconvertedtoacontinuousoperationmode．21dayslaterthesimultaneousshort-cutnitrificationanddenitrificationwassuccess-fullyaccomplishedinthecathodeoftheMFC．Theconcentrationsofammonianitriteandnitrateofthecathodeeffluentwere0．3mg/L15．9mg/Land0．6mg/Lrespectively．Theconversionrateofammoniatonitritewashigherthan95%andmorethan50%nitrogenwasremovedbyautotrophicdenitrification．TheremovalefficiencyofCODwashigherthan85%．Combiningthesimultaneousshort-cutnitrificationanddenitrificationprocesswithMFCoxygenobtainedtheelectronsintheaerobiccathodeandahighpHvalueenvironmentcanbecreatedcon-sequentlynitrogenremovalandelectricenergyrecoverycanbeachievedatthesametime．Thesimultaneousshort-cutnitrificationanddenitrificationprocesscanbestrengthenedandtheneedoftheexternalalkalinitycanbereduced．Keywordsmicrobialfuelcellsimultaneousshort-cutnitrificationanddenitrificationprocessA/Obiolog-icalnitrogenremovalprocessbio-cathode2013G32920172014－11－102015－01－111990—。[e-mail]*[e-mail]12。MFCO2、NO－2-NNO－3-N。9am-moniaoxidizingbacteriaAOBNH+4-NNO－2-Nnitriteoxidizingbacteri-aNOBNO－2-NNO－3-NNO－3-NNO－2-NN23。NO－2-NNO－2-NNO－3-N425%40%、5。MFC。6MFCMFCLiWeiqing7MFCVirdisB．8MFCFeiZhang92MFCDO。MFC。MFC、。MFCA/OpHMFC。11．1MFCA/O1、3。8cm13cm0．653L8cm、5cm0．251Lnafion117。29±2℃0～9999Ω0．391L。、24h。YZ1515X200%。100Ω13d100Ω25Ω。10h4h6h。1MFCFig．1Sketchofsimultaneousshort-cutnitrificationanddenitrificationMFC1．2COD400mg/L60mg/LCH3COONa0．51g/LNH4Cl0．23g/LKH2PO42．844g/LK2HPO4·3H2O8．574g/LKCl0．13g/L1mL/L10。1．3SCE+0．242V232COD、NO－3-N、NO－2-NNH+4-N11、pHpHS10Hach-HQ30dHACHPCI1717。23814MFC22．1MFC、、pHpH7．52freeammoniaFA1．3mg/L5．8mg/L1537．7mg/LNH+414．5mg/L2pH8．7FA3．8mg/L3。2、、Fig．2VariationofnitrogencompoundsincathodeofMFCduringstaticculture3pHFAFig．3VariationsofpHandFAconcentrationsincathodeofMFCduringstaticculturepHFA44pHFAFig．4VariationsofpHandFAconcentrationsincathodeofMFCduringcontinuousoperation567。110pHFA85Fig．5VariationsofoutputvoltageandcurrentdensityofMFCduringcontinuousoperation6Fig．6VariationofnitrogencompoundsincathodeofMFCduringcontinuousoperation338197Fig．7TNremovalefficiencyincathodeofMFCandinheterotrophicdenitrificationtankduringcontinuousoperation83%TN0MFC。1119pHFATN038．7%6mg/L0mg/L9MFC5。11CODCOD25±5mg/L2AOBAOB34。MFCTN。2．2MFC202611．8～18．5mg/LTN57．5%～79．1%7．35～10．20A/m3。210．3mg/L15．9mg/L0．6mg/L95%50%COD85%MFC。MFC2612h99999Ω2Ω8。MFC3、。MFC。8、、Fig．8Variationsofoutputvoltageanodepotentialcathodepotentialandpowerdensitywithcurrentdensity99999～4000Ω122000～8Ω112Ω138Ω。MFCOCV620．7mV1．81W/m3MFCOCV、。2．3MFC2．3．1MFC15、MFC43814MFCpH24h7．408．38。12H+H2OH2OOH－pH16。O2+4H++4e=2H2O1O2+2H2O+4e=4OH2DO、、pHFA。MFCpHFA14FA0．1～1mg/LNOBMFCpHFANOB。2．3．2MFC61101119TN。MFC。pHFA。MFCpH“TN”TNpH3～617。pHFANOB。MFCpHFA。NO－3+2e+2H+→NO－2+H2OE0'=+0．433VvsSHE3NO－2+e+2H+→NO+H2OE0'=+0．350VvsSHE4NO+e+H+→12N2O+12H2OE0'=+1．175VvsSHE512N2O+H+→12N2+12N2OE0'=+1．355VvsSHE62．3．3MFCMFC3TNMFC0pHFA。MFCpH。2．4MFC26。30min302Ω7．1mg/L17．0mg/LTN58．5%。3125Ω6333．0mg/L40mg/L383．0±0．3mg/L2d15．3mg/L13．6mg/L3．4mg/L412d3．1mg/L20．8mg/L4．7mg/L。FA。210．3mg/LFA0．01mg/LFA0．01mg/LNOB。31DO5381995%TN79%50%COD90%。2MFCOCV、620．7mV、112Ω1．81W/m3MFC。1MinB．Ｒománó．B．AngelidakiI．Importanceoftempera-tureandanodicmediumcompositiononmicrobialfuelcellperformance．BiotechnologyLetters20083071213-12182LoganB．E．HamelersB．ＲozendalＲ．etal．MicrobialfuelcellsMethodologyandtechnology．EnvironmentalSci-ence＆Technology200640175181-51923．A/O．2006265703-709MaYongWangShuyingZengWeietal．A/Opilot-scalenitrogenremovalprocesstreatingdomesticwastewaterⅠThestudyofshort-cutnitrificationanddenitrification．ActaScientiaeCircumstantiae2006265703-709inChi-nese4HellingaC．SchellenA．A．J．C．MulderJ．W．etal．TheSHAＲONprocessAninnovativemethodfornitrogenre-movalfromammonium-richwastewater．WaterScienceandTechnology1998379135-1425PengYongzhenZhuGuibing．Biologicalnitrogenremovalwithnitrificationanddenitrificationvianitritepathway．Ap-pliedMicrobiologyandBiotechnology200673115-266．．20103181932-1936LiangPengZhangLingHuangXiaetal．B