Application of redox mediators in bioelectrochemical systems

Martínez, Claudia M.; Álvarez, Luis H.

doi:10.1016/j.biotechadv.2018.05.005

Cited by 102 publications

(50 citation statements)

References 132 publications

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“…3) indicated that ANME seemed to be a weak electricigen in comparison to strong counterparts such as Geobacter [33]. Use of mediators is suggested as an effective method to improve the EET kinetics of weak electricigen [33], which has been intensively confirmed to enhance performance of BESs with different strains as biocatalysts [34,35]. This is proved to be applicable to ANME as well in the current study.…”

Section: Discussionsupporting

confidence: 51%

Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator

Zhang

Rabiee

Frank

et al. 2020

Biotechnol Biofuels

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Background Bioelectrochemical methane oxidation catalysed by anaerobic methanotrophic archaea (ANME) is constrained by limited methane bioavailability as well as by slow kinetics of extracellular electron transfer (EET) of ANME. In this study, we tested a combination of two strategies to improve the performance of methane-driven bioelectrochemical systems that includes (1) the use of hollow fibre membranes (HFMs) for efficient methane delivery to the ANME organisms and (2) the amendment of ferricyanide, an effective soluble redox mediator, to the liquid medium to enable electrochemical bridging between the ANME organisms and the anode, as well as to promote EET kinetics of ANME. Results The combined use of HFMs and the soluble mediator increased the performance of ANME-based bioelectrochemical methane oxidation, enabling the delivery of up to 196 mA m−2, thereby outperforming the control system by 244 times when HFMs were pressurized at 1.6 bar. Conclusions Improving methane delivery and EET are critical to enhance the performance of bioelectrochemical methane oxidation. This work demonstrates that by process engineering optimization, energy recovery from methane through its direct oxidation at relevant rates is feasible.

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Section: Discussionsupporting

confidence: 51%

Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator

Zhang

Rabiee

Frank

et al. 2020

Biotechnol Biofuels

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“…15 In this paper, Figures 2a and 3a show the co-existence of CV curves in positive and negative potentials, which indicated that the electron transfer in MFCs occurred through both DET and MET. 31 When SAs were added, the CV area was decreased, which might be due to decreased bacterial adhesion on the electrode surface 27 and the weakening of electron transfer from cell membrane to solid electrode via cytochrome c (DET) [32][33][34] ; these results were confirmed by protein concentration and SEM analysis. Meanwhile, Figure 4c,d showed that the anode material could efficiently adsorb S. putrefaciens, which was consistent with the results of other similar studies.…”

Section: Discussionmentioning

confidence: 86%

Effect of sulfonamides on the electricity generation by Shewanella putrefaciens in microbial fuel cells

Yang

Jiang

Liu

et al. 2020

Env Prog and Sustain Energy

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Overuse of antibiotics impacts environmental health worldwide. In this paper, the effect on the performance of microbial fuel cells (MFCs) under treatments with sulfonamides (SAs) was investigated. The results showed that when MCFs were treated with sulfamonomethoxine (SMM), the maximum power density was higher (20.95 mW/m 2) than when treated with sulfadiazine (SDZ) (19.79 mW/m 2). The power density of MFCs gradually decreased with increased concentration of SAs. Microbial activity analysis showed that SAs had negative effects on bacterial growth, riboflavin secretion and cell attachment on the MFCs anode. The power density of MFCs at different pH values was in order as follows: pH 6 > pH 7 > pH 8 > pH 5 > pH 9, where the highest was 22.90 mW/m 2 at pH 6. Electrochemical analysis showed that conditions favorable to the protonation of SMM also had a positive effect on the electrical performance of MFCs. These findings could provide the basis for uncovering the mechanism by which SAs affect electricity generation in MFCs, and demonstrates the feasibility for the efficient degradation of SAs and power generation.

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“…Integration of suitable inorganic and organic processes benefit bidirectional exchange of electrons and energy with the external environment, thereby promoting a wide array of applications in environmental purification and clean energy production. and efficacy, CdS NPs-derived biohybrids commonly display superior performance compared to treatments with specific redox mediators (Holzmeister et al, 2018;Martinez and Alvarez, 2018).…”

Section: Engineered Cds Nps Immobilized Nonphototrophic Microorganismmentioning

confidence: 99%

Cadmium sulfide nanoparticles-assisted intimate coupling of microbial and photoelectrochemical processes: Mechanisms and environmental applications

Dong

Wang

Yan

et al. 2020

Science of The Total Environment

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Application of redox mediators in bioelectrochemical systems

Cited by 102 publications

References 132 publications

Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator

Enhancing methane oxidation in a bioelectrochemical membrane reactor using a soluble electron mediator

Effect of sulfonamides on the electricity generation by Shewanella putrefaciens in microbial fuel cells

Cadmium sulfide nanoparticles-assisted intimate coupling of microbial and photoelectrochemical processes: Mechanisms and environmental applications

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