光电催化-电极生物膜体系构建及其环境应用研究

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1、万方数据浙江工商大学硕士学位论文R惦RICATION0FPHOTOELECTROCATAIⅣTICANDELECTROCHEMICALLYACTIVEB10FILMHYBRIDSYSTEMANDITSENVIRONMENTALAPPLICATIONABSTRACTEnvironmentalpollutionandenergyshortagehavebecometwoseriousproblemsinthemodemtimewhichrestrictthedevelopmentofsociety．Inthispaper

2、,areactorwhichintegratedphotocatalysis，electrocatalysisandbiofilmmethodwasdesignedtosolvethetwoproblems．ItfocusedontheremovalofinorganicnitrogeninthewastewaterandreducingC02dissolvedinwatertoCH4．1．Photocatalyticallyactivebiofilmhybridsystemcombinedofphotocataly

3、ticandactivebiofilmmethod．Onthesurfaceoftheanode，NH4+-NwasoxidizedtoN2，N03-NandN02"-Nbyphotocatalyticallyunderavisiblelightirradiation；N03。-NandN02一一NwerereducedtoN2bydenitrifyingbiofilmgrewonthecathode．Throughtheabovetwoelectrodesteps，nitrogenpollutantswererem

4、ovedsynchronouslyfromwastewater．Inthispart，AgUTi02-NTsanodeandautotrophicdenitrificationbiofilmcathodewereusedtoconstructthereactorandtheeffectsofappliedvoltageandpHonnitrogenremovalefficiencywerestudied．Undertheoptimumconditions(visiblelightirradiation，3Vappli

5、edvoltageandpH=8)，theIII万方数据浙江工商大学硕士学位论文removalefficiencyofNH4+-Nreached71．1％．3timesthantheremovalefficiencywithoutvisiblelightirradiation；theconcentrationofN03--Nreducedfrom20．0mg／Lto5．7mg／L；theaccumulationofNOz--Nwas0．6mgm，50％ofthatinotherconditions．Themaximu

6、mtotalnitrogenremovalefficiencywasabout89．6％．Thereactorshowedagoodstability,theremovalefficiencyofNI-h+-Nstillmaintainedatabout70％after5timesrecycledusedofAgI／Ti02-NTs，autotrophicdenitrificationbiofilmgrewwellintheprocess，Thedehydrogenaseactivitywas13．0og／(rnL·

7、h1anddidnotappearadownwardtrend．2．Theelectrochemicallyactivebiofilmhybridsystemcombinedeelectrochemicallyandactivebiofilmmethod．Inthesystem，anaerobicbiofilmreducedC02dissolvedinwatertoCH4andtheelectrodesystemprovidedadequateelectronicforthereduction．Inthispart，

8、modifiedcarbonclothelectrodeandanaerobicgranularsludgewereusedtobuildtheelectrochemicallyactivebiofilmhybridreactor．After10days，theaccumulationofCH4was14mmol／LandtheC02reduc