title: Control of power sourced from a microbial fuel cell reduces its start-up time and increases bioelectrochemical activity.
abstract: Microbial fuel cell (MFC) performance depends on the selective development of an electrogenic biofilm at an electrode. Controlled biofilm enrichment may reduce start-up time and improve subsequent power performance. The anode potential is known to affect start-up and subsequent performance in electrogenic bio-catalytic consortia. Control strategies varying electrical load through gradient based maximum power point tracking (MPPT) and transient poised anode potential followed by MPPT are compared to static ohmic loading. Three replicate H-type MFCs were used to investigate start-up strategies: (1) application of an MPPT algorithm preceded by poised-potential at the anode (+0.645 V vs Ag/AgCl); (2) MFC connected to MPPT-only; (3) static external load of 1 kΩ and 500 Ω. Active control showed a significant reduction in start-up time from 42 to 22 days, along with 3.5-fold increase in biocatalytic activity after start-up. Such active control may improve applicability by accelerating start-up and enhancing MFC power and bio-catalytic performance.
authors.affiliation: Sustainable Environment Research Centre (SERC), Faculty of Advanced Technology, University of Glamorgan, Pontypridd, Mid-Glamorgan CF37 1DL, UK. hboghani@glam.ac.uk
authors.forename: Hitesh C
authors.initials: HC
authors.lastname: Boghani
authors.forename: Jung Rae
authors.initials: JR
authors.lastname: Kim
authors.forename: Richard M
authors.initials: RM
authors.lastname: Dinsdale
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Guwy
authors.forename: Giuliano C
authors.initials: GC
authors.lastname: Premier
mesh_terms: D000465:Algorithms; D001674:Bioelectric Energy Sources; D018441:Biofilms; D004560:Electricity; D004563:Electrochemistry; D004566:Electrodes; D012834:Silver / Q000737:chemistry; D018030:Silver Compounds / Q000737:chemistry; D013997:Time Factors
chemical_list: D018030:Silver Compounds; D012834:Silver; C037548:silver chloride