Anodic and cathodic microbial communities in single chamber microbial fuel cells

Daghio, Matteo; Gandolfi, Isabella; Bestetti, Giuseppina; Franzetti, Andrea; Guerrini, E.; Cristiani, Pierangela

doi:10.1016/j.nbt.2014.09.005

Cited by 62 publications

(47 citation statements)

References 54 publications

(62 reference statements)

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“…Interestingly, iron-reducing microorganisms, which usually dominate the anodic communities in BES fed with more readily degradable substrates, such as acetate, were scarce (69,70).…”

Section: Discussionmentioning

confidence: 99%

Anodes Stimulate Anaerobic Toluene Degradation via Sulfur Cycling in Marine Sediments

Daghio

Vaiopoulou

Patil

et al. 2016

Appl Environ Microbiol

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cHydrocarbons released during oil spills are persistent in marine sediments due to the absence of suitable electron acceptors below the oxic zone. Here, we investigated an alternative bioremediation strategy to remove toluene, a model monoaromatic hydrocarbon, using a bioanode. Bioelectrochemical reactors were inoculated with sediment collected from a hydrocarbon-contaminated marine site, and anodes were polarized at 0 mV and ؉300 mV (versus an Ag/AgCl [3 M KCl] reference electrode). The degradation of toluene was directly linked to current generation of up to 301 mA m ؊2 and 431 mA m ؊2 for the bioanodes polarized at 0 mV and ؉300 mV, respectively. Peak currents decreased over time even after periodic spiking with toluene. The monitoring of sulfate concentrations during bioelectrochemical experiments suggested that sulfur metabolism was involved in toluene degradation at bioanodes. 16S rRNA gene-based Illumina sequencing of the bulk anolyte and anode samples revealed enrichment with electrocatalytically active microorganisms, toluene degraders, and sulfate-reducing microorganisms. Quantitative PCR targeting the ␣-subunit of the dissimilatory sulfite reductase (encoded by dsrA) and the ␣-subunit of the benzylsuccinate synthase (encoded by bssA) confirmed these findings. In particular, members of the family Desulfobulbaceae were enriched concomitantly with current production and toluene degradation. Based on these observations, we propose two mechanisms for bioelectrochemical toluene degradation: (i) direct electron transfer to the anode and/or (ii) sulfide-mediated electron transfer.

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“…Interestingly, iron-reducing microorganisms, which usually dominate the anodic communities in BES fed with more readily degradable substrates, such as acetate, were scarce (69,70).…”

Section: Discussionmentioning

confidence: 99%

Anodes Stimulate Anaerobic Toluene Degradation via Sulfur Cycling in Marine Sediments

Daghio

Vaiopoulou

Patil

et al. 2016

Appl Environ Microbiol

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“…Moreover, interaction and/or coexistence in electron transfer mechanisms between bacteria and solid electrodes are not well described, especially in complex environments in which a multitude of microbial species (electroactive or not) can be found on the electrodes [59], [60], [61], [62], [63]. Finally, the attraction of microbial cells towards the electrodes [64], biofilm formation and development on anode surface [64], [65], interaction and inter-species cooperation [60], [61], [62], [63], [66], [67], [68], [69], as well as influence of environmental parameters on microbial colonization [4], [25], remain unknown due to the difficulty of coupling the complicated processes of microbial electrochemistry and the existing imaging technology [70], [71], [72], [73], [74]. To a certain extent, the interaction of bacteria with electrode surfaces has been studied by varying the surface morphology and chemistry [75].…”

Section: Introductionmentioning

confidence: 99%

Microbial fuel cells: From fundamentals to applications. A review

Santoro

Arbizzani

Erable

et al. 2017

Journal of Power Sources

1,426

677

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In the past 10–15 years, the microbial fuel cell (MFC) technology has captured the attention of the scientific community for the possibility of transforming organic waste directly into electricity through microbially catalyzed anodic, and microbial/enzymatic/abiotic cathodic electrochemical reactions. In this review, several aspects of the technology are considered. Firstly, a brief history of abiotic to biological fuel cells and subsequently, microbial fuel cells is presented. Secondly, the development of the concept of microbial fuel cell into a wider range of derivative technologies, called bioelectrochemical systems, is described introducing briefly microbial electrolysis cells, microbial desalination cells and microbial electrosynthesis cells. The focus is then shifted to electroactive biofilms and electron transfer mechanisms involved with solid electrodes. Carbonaceous and metallic anode materials are then introduced, followed by an explanation of the electro catalysis of the oxygen reduction reaction and its behavior in neutral media, from recent studies. Cathode catalysts based on carbonaceous, platinum-group metal and platinum-group-metal-free materials are presented, along with membrane materials with a view to future directions. Finally, microbial fuel cell practical implementation, through the utilization of energy output for practical applications, is described.

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“…In this case, bacteria are able to catalyze the cathode reaction using oxygen, sulfate, etc as final electron acceptor [5]. It has been found that several bacteria are capable to enhance the cathode reaction but the reaction mechanisms especially with multispecies biofilm are not completely clear and understood [30], [31], [32].…”

Section: Introductionmentioning

confidence: 99%

Bimetallic platinum group metal-free catalysts for high power generating microbial fuel cells

Kodali

Santoro

Herrera

et al. 2017

Journal of Power Sources

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M1-M2-N-C bimetallic catalysts with M1 as Fe and Co and M2 as Fe, Co, Ni and Mn were synthesized and investigated as cathode catalysts for oxygen reduction reaction (ORR). The catalysts were prepared by Sacrificial Support Method in which silica was the template and aminoantipyrine (AAPyr) was the organic precursor. The electro-catalytic properties of these catalysts were investigated by using rotating ring disk (RRDE) electrode setup in neutral electrolyte. Fe-Mn-AAPyr outperformed Fe-AAPyr that showed higher performances compared to Fe-Co-AAPyr and Fe-Ni-AAPyr in terms of half-wave potential. In parallel, Fe-Co-AAPyr, Co-Mn-AAPyr and Co-Ni-AAPyr outperformed Co-AAPyr. The presence of Co within the catalyst contributed to high peroxide production not desired for efficient ORR. The catalytic capability of the catalysts integrated in air-breathing cathode was also verified. It was found that Co-based catalysts showed an improvement in performance by the addition of second metal compared to simple Co- AAPyr. Fe-based bimetallic materials didn't show improvement compared to Fe-AAPyr with the exception of Fe-Mn-AAPyr catalyst that had the highest performance recorded in this study with maximum power density of 221.8 ± 6.6 μWcm−2. Activated carbon (AC) was used as control and had the lowest performances in RRDE and achieved only 95.6 ± 5.8 μWcm−2 when tested in MFC.

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Anodic and cathodic microbial communities in single chamber microbial fuel cells

Cited by 62 publications

References 54 publications

Anodes Stimulate Anaerobic Toluene Degradation via Sulfur Cycling in Marine Sediments

Anodes Stimulate Anaerobic Toluene Degradation via Sulfur Cycling in Marine Sediments

Microbial fuel cells: From fundamentals to applications. A review

Bimetallic platinum group metal-free catalysts for high power generating microbial fuel cells

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