Identifying the microbial communities and operational conditions for optimized wastewater treatment in microbial fuel cells

Ishii, Shun’ichi; Suzuki, Shino; Norden-Krichmar, Trina M.; Wu, Angela; Yamanaka, Yuko; Nealson, Kenneth H.; Bretschger, Orianna

doi:10.1016/j.watres.2013.07.048

Cited by 90 publications

(49 citation statements)

References 45 publications

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“…As an example, several types of organic waste have been used as fuel for microbial anodes [15], [16], but electroactive bacteria kinetics remains poor and the interaction between electrode and bacteria has still not been fully understood [56], [57], [58]. 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].…”

Section: Introductionmentioning

confidence: 99%

Microbial fuel cells: From fundamentals to applications. A review

Santoro

Arbizzani

Erable

et al. 2017

Journal of Power Sources

1,386

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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Section: Introductionmentioning

confidence: 99%

Microbial fuel cells: From fundamentals to applications. A review

Santoro

Arbizzani

Erable

et al. 2017

Journal of Power Sources

1,386

677

View full text Add to dashboard Cite

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“…In this case, the protons and electrons pass through the anode chamber to the cathode chamber via the PEM and an external circuit respectively. This electron transfer from the anode to the cathode produces an electricity current (Logan et al, 2006; Venkata Mohan et al, 2008; Kim and Lee, 2010; Mao et al, 2010; Samrot et al, 2010; Ishii et al, 2013). MFCs can be used for wastewater treatment since organic materials can be easily oxidized as fuel in the anode compartment.…”

Section: Introductionmentioning

confidence: 99%

An Overview of Electron Acceptors in Microbial Fuel Cells

2017

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Microbial fuel cells (MFC) have recently received increasing attention due to their promising potential in sustainable wastewater treatment and contaminant removal. In general, contaminants can be removed either as an electron donor via microbial catalyzed oxidization at the anode or removed at the cathode as electron acceptors through reduction. Some contaminants can also function as electron mediators at the anode or cathode. While previous studies have done a thorough assessment of electron donors, cathodic electron acceptors and mediators have not been as well described. Oxygen is widely used as an electron acceptor due to its high oxidation potential and ready availability. Recent studies, however, have begun to assess the use of different electron acceptors because of the (1) diversity of redox potential, (2) needs of alternative and more efficient cathode reaction, and (3) expanding of MFC based technologies in different areas. The aim of this review was to evaluate the performance and applicability of various electron acceptors and mediators used in MFCs. This review also evaluated the corresponding performance, advantages and disadvantages, and future potential applications of select electron acceptors (e.g., nitrate, iron, copper, perchlorate) and mediators.

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“…The biofilm acts as a catalyst for the metabolism of unrefined substrates (organic matter), during which electrons, protons, and other organic compounds are released. An understanding of the anodic reaction mechanism, together with an improvement of the electron transfer and the biofilm growth needs to be addressed to achieve an increased power density [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Carbon-Based Air-Breathing Cathodes for Microbial Fuel Cells

et al. 2016

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Abstract:A comparison between different carbon-based gas-diffusion air-breathing cathodes for microbial fuel cells (MFCs) is presented in this work. A micro-porous layer (MPL) based on carbon black (CB) and an activated carbon (AC) layer were used as catalysts and applied on different supporting materials, including carbon cloth (CC), carbon felt (CF), and stainless steel (SS) forming cathode electrodes for MFCs treating urine. Rotating ring disk electrode (RRDE) analyses were done on CB and AC to: (i) understand the kinetics of the carbonaceous catalysts; (ii) evaluate the hydrogen peroxide production; and (iii) estimate the electron transfer. CB and AC were then used to fabricate electrodes. Half-cell electrochemical analysis, as well as MFCs continuous power performance, have been monitored. Generally, the current generated was higher from the MFCs with AC electrodes compared to the MPL electrodes, showing an increase between 34% and 61% in power with the AC layer comparing to the MPL. When the MPL was used, the supporting material showed a slight effect in the power performance, being that the CF is more powerful than the CC and the SS. These differences also agree with the electrochemical analysis performed. However, the different supporting materials showed a bigger effect in the power density when the AC layer was used, being the SS the most efficient, with a power generation of 65.6 mW·m −2 , followed by the CC (54 mW·m −2 ) and the CF (44 mW·m −2 ).

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Identifying the microbial communities and operational conditions for optimized wastewater treatment in microbial fuel cells

Cited by 90 publications

References 45 publications

Microbial fuel cells: From fundamentals to applications. A review

Microbial fuel cells: From fundamentals to applications. A review

An Overview of Electron Acceptors in Microbial Fuel Cells

Carbon-Based Air-Breathing Cathodes for Microbial Fuel Cells

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