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1、毕业设计(论文)题目:新型小球藻生物阴极型MFC的基础特性研究学院:生物与制药工程学院专业:生物技术新型小球藻生物阴极型MFC的基础特性研究摘要随着全世界范围内能源紧缺和环境污染问题的加剧,研发新的环境友好处理工艺从有机废水中回收有价能源已经成为环境工程领域一个重要的方向。能源微藻生物阴极型微生物燃料电池因可同时实现污染治理、零碳排放、电能产生、CO2捕捉、生物柴油及藻体残渣等有价回收的多重功效,具有广阔的应用前景。本文利用自行创新设计的阴极利于小球藻生长的MFC反应器作为实验模型,首先以正常阴极液对其进
2、行启动运行,待阳极产电菌富集成熟,电池产电稳定以后分别考察了阴极正常运行期、阴极加藻期、阴极换载铂电极期、阴极持续光照期这四个不同周期运行条件下该MFC的产电情况、阴极小球藻的生长情况、阴极溶氧情况及阳极人工废水的COD处理情况。试验结果表明阴极投加小球藻后MFC的产电水平、阴极溶氧水平、阳极人工废水的COD处理率都有了明显的提高,最终在阴极持续光照期得到最大输出电压为483.1mv,是阴极正常运行期的4.8倍,最大输出功率密度为27.5mW/㎡,是正常运行期的28.9倍,内阻为为480.7Ω,是正常运行
3、期的0.4倍,阴极溶氧的平均水平较稳定,大约为6.4mg/L,而阴极正常运行期时溶氧由初始4.71mg/L一直降到1.08mg/L,阳极人工废水处理10d后的COD处理率为83.21%。同时将小球藻放至MFC的阴极室进行培养并不会对其造成毒害,小球藻生长情况良好。关键词:小球藻,微生物燃料电池(MFC),生物阴极,输出电压BasiccharacteristicsresearchofanovelMFCwithChlorellabiocathodeAbstractWithworldwideenergyshor
4、tageandenvironmentalpollutionincreasing,thedevelopmentofnewenvironmentallyfriendlywastewatertreatmentprocesstorecoverenergyhasbecomeanimportantfieldofenvironmentalengineeringdirection.Microbialfuelcell(MFC)withenergymicroalgaebiocathodecanbesimultaneously
5、achievedpollutioncontrol,zerocarbonemissions,powergeneration,CO2capture,andalgaebiodieselandothervaluableresiduerecyclingmultipleeffects,hasbroadapplicationprospects.Inthispaper,theinnovativedesignoftheirownbeneficialtotheGrowthofthecathodeMFCreactorasane
6、xperimentalmodel,thefirsttostartitsnormaloperationliquidcathode,anodeproducingelectricityEnrichmentbemature,stablepowerbatteryproductionwereinvestigatedafterthenormalcathoderun,addingalgaeintothecathode,thecathodeelectrodeofPtandthecathodelightofthisongoi
7、ngcycleoffourdifferentoperatingconditions,theMFCproducingelectricity,thegrowthofChlorellaanddissolvedoxygenconditionsinthecathode,andtheCODtreatmentsituationoftheartificialwaterinanode.TheresultsshowthataddingChlorellaintothecathodeproductionaftertheMFCpo
8、werlevel,dissolvedoxygenlevelofthecathode,anodeCODartificialwastewatertreatmentratehadasignificantincreaseand,ultimately,thegreatestperiodofcontinuouslightcathodeoutputvoltageis483.1mv,is4.8timesasthenormaloperation