Application of Electrochemically Active Bacteria as Anodic Biocatalyst in Microbial Fuel Cells

Zhang, Yichi; Jiang, Zhaohong; Liu, Ying

doi:10.1016/s1872-2040(15)60800-3

Cited by 34 publications

(24 citation statements)

References 54 publications

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“…As shown in fig. 5, electrochemically active bacteria (EAB), classified according to a previous study [40], accounted for around 60% of the population at the anode with or without AHLs. A significant difference in EAB was visible at the cathode, as it clearly increased after the addition of AHLs.…”

Section: Microbial Community Structure Analysismentioning

confidence: 99%

Quorum sensing alters the microbial community of electrode-respiring bacteria and hydrogen scavengers toward improving hydrogen yield in microbial electrolysis cells

et al. 2016

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Quorum sensing has been widely applied to enhance the energy recovery of bioelectrochemical system as a sustainable pathway to enhance communication between cells and electrodes. However, how signalling molecules (acyl-homoserine lactones, AHLs) regulate the microbial community to improve hydrogen generation in microbial electrolysis cells (MECs) is not well understood, especially the subsequent influence on interspecies relationships among not only electrode-respiring bacteria but also hydrogen scavengers. Understanding AHL regulation in a complicated and actual biofilm system will be valuable for future applications of microbial electrochemical technology. Herein, we added short-chain AHLs (3OC6) to regulate the biofilm community on bio-electrodes in MECs. As a result, hydrogen yields were enhanced with AHL addition, increasing by 5.57%, 38.68%, and 81.82% with varied external voltages (0.8 V, 0.6 V, and 0.4 V, respectively). Accordingly, overall reactor performance was enhanced, including coulombic efficiency, electron recovery efficiency, and energy efficiency. Based on an electrochemical impedance spectra analysis, the structured biofilm under simple nutrient conditions (acetate) showed a lower internal resistance with AHL addition, indicating that the microbial communities were altered to enhance electron transfer between the biofilm and electrode. The change in the cathodic microbial structure with more electrochemically active bacteria and fewer hydrogen scavengers could contribute to a higher electron recovery and hydrogen yield with AHL addition. The regulation of the microbial community structure by AHLs represents a potential strategy to enhance electron transfer and hydrogen generation in bioelectrochemical systems.

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Section: Microbial Community Structure Analysismentioning

confidence: 99%

Quorum sensing alters the microbial community of electrode-respiring bacteria and hydrogen scavengers toward improving hydrogen yield in microbial electrolysis cells

et al. 2016

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“…Compared with single-strain cultures, the use of mixed-culture bacteria in METs have some advantages like the no necessity of sterilization, their environmental adaptation, application in continuous processes, the higher robustness and electrical productivity [65,68] Currently it is not possible for a MET to produce cost-effective energy [26], however, they constitute as an alternative technology to harvest energy directly from wastewater [73]. Some of the limitations for field application of METs include: installation costs, expensive electrode materials and low energy density generated [74].…”

Section: Electroactive Bacteria and Mixed Biofilms Formationmentioning

confidence: 99%

Microbial Electrochemical Technologies for Wastewater Treatment: Principles and Evolution from Microbial Fuel Cells to Bioelectrochemical-Based Constructed Wetlands

Ramírez-Vargas¹,

Prado²,

Arias³

et al. 2018

Preprint

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“…In fact, recognition of this similarity within the fuel cell community has seen microbes, their redox-active enzymes, and even mitochondria themselves, being successfully used as components of electrodes for biofuel cells due to their excellent catalytic ability to transfer electrons and promote environmentally significant redox reactions (Arnold and Rechnitz, 1980;Heller, 1992;Chang et al, 2006;Arechederra and Minteer, 2008;Tran and Barber, 2012;. Certain geochemical environments also constitute fuel-cell-like systems, for example, at hydrothermal vents where electrical and pH potentials are generated at the interface between reduced hydrothermal fluid and oxidizing seawater (Yamamoto et al 2013;Hall 1997, 2006;Baross and Hoffman 1985;Martin and Russell 2007).…”

Section: Introductionmentioning

confidence: 99%

The Fuel Cell Model of Abiogenesis: A New Approach to Origin-of-Life Simulations

et al. 2014

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Abstract:In this paper we discuss how prebiotic geo-electrochemical systems can be modeled as a fuel cell and how laboratory simulations of the origin of life in general can benefit from this systems-led approach. As a specific example, we detail the components of what we have termed the "prebiotic fuel cell" (PFC) operating at a putative Hadean hydrothermal vent, and we present preliminary results utilizing electrochemical analysis techniques and proton exchange membrane (PEM) fuel cell components to test the properties of this and other geo-electrochemical systems. The modular nature of fuel cells makes them ideal for creating geo-electrochemical reactors to simulate hydrothermal systems on wet rocky planets and characterize the energetic properties of the seafloor / hydrothermal interface. That electrochemical techniques should be applied to simulating the origin of life follows from the recognition of the fuel cell-like properties of prebiotic chemical systems and the earliest metabolisms. Conducting this type of laboratory simulation of the emergence of bioenergetics will not only be informative in the context of the origin of life on Earth, but may help us understand whether it is possible for life to have emerged in similar environments on other worlds.2

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Application of Electrochemically Active Bacteria as Anodic Biocatalyst in Microbial Fuel Cells

Cited by 34 publications

References 54 publications

Quorum sensing alters the microbial community of electrode-respiring bacteria and hydrogen scavengers toward improving hydrogen yield in microbial electrolysis cells

Quorum sensing alters the microbial community of electrode-respiring bacteria and hydrogen scavengers toward improving hydrogen yield in microbial electrolysis cells

Microbial Electrochemical Technologies for Wastewater Treatment: Principles and Evolution from Microbial Fuel Cells to Bioelectrochemical-Based Constructed Wetlands

The Fuel Cell Model of Abiogenesis: A New Approach to Origin-of-Life Simulations

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