High rate copper and energy recovery in microbial fuel cells

P. Rodenas Motos, A. ter Heijne, R.D. van der Weijden, M. Saakes, C.J.N. Buisman, T.H.J.A. Sleutels

Research output: Contribution to journalArticleAcademicpeer-review

35 Citations (Scopus)

Abstract

Bioelectrochemicalsystems(BESs)areanovel,promisingtechnologyfortherecoveryofmetals.Theprerequisiteforupscalingfromlaboratorytoindustrialsizeisthathighcurrentandhighpowerdensitiescanbeproduced.Inthisstudywereporttherecoveryofcopperfromacoppersulfatestream(2gL-1Cu2+)usingalaboratoryscaleBESathighrate.Toachievethis,weusedanovelcellconfigurationtoreducetheinternalvoltagelossesofthesystem.Attheanode,electroactivemicroorganismsproduceelectronsatthesurfaceofanelectrode,whichgeneratesastablecellvoltageof485mVwhencombinedwithacathodewherecopperisreduced.Inthissystem,amaximumcurrentdensityof23Am-2incombinationwithapowerdensityof5.5Wm-2wasproduced.XRDanalysisconfirmed99%purityincopperofcopperdepositedontocathodesurface.Analysisofvoltagelossesshowedthatatthehighestcurrent,mostvoltagelossesoccurredatthecathode,andmembrane,whileanodelosseshadthelowestcontributiontothetotalvoltageloss.TheseresultsencouragefurtherdevelopmentofBESsforbioelectrochemicalmetalrecovery
Original languageEnglish
Article number527
Number of pages8
JournalFrontiers in Microbiology
Volume6
DOIs
Publication statusPublished - 2015

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