Recent advances and emerging challenges in microbial electrolysis cells (MECs) for microbial production of hydrogen and value-added chemicals

Kadier, Abudukeremu; Kalil, Mohd Sahaid; Abdeshahian, Peyman; Chandrasekhar, K.; Mohamed, Azah; Azman, Nadia Farhana; Logroño, Washington; Simayi, Yibadatihan; Hamid, Aidil Abdul

doi:10.1016/j.rser.2016.04.017

Cited by 347 publications

(86 citation statements)

References 257 publications

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“…However, it also led to the consumption of H 2 by methanogens to produce CH 4 . During MEC operation, methanogens compete directly with exoelectrogenic biocatalyst for substrate and also consume H 2 , which adversely affect the overall process efficiency [2,72]. In addition, purity of H 2 generation in the MECs is also greatly influenced by hydrogenotrophic methanogens ( Table 2).…”

Section: Hydrogenmentioning

confidence: 99%

“…Due to rapid industrialization and rising population, the energy crisis and pollution have become the foremost problems that humankind will be facing in the future [1,2]. The greenhouse effect in the atmosphere is increasing day by day due to the rapid usage of fossil fuels that discharge CO 2 , the major greenhouse gas that damages the environment [3].…”

Section: Introductionmentioning

confidence: 99%

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Electro-Fermentation in Aid of Bioenergy and Biopolymers

et al. 2018

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Abstract:The soaring levels of industrialization and rapid progress towards urbanization across the world have elevated the demand for energy besides generating a massive amount of waste. The latter is responsible for poisoning the ecosystem in an exponential manner, owing to the hazardous and toxic chemicals released by them. In the past few decades, there has been a paradigm shift from "waste to wealth", keeping the value of high organic content available in the wastes of biological origin. The most practiced processes are that of anaerobic digestion, leading to the production of methane. However; such bioconversion has limited net energy yields. Industrial fermentation targeting value-added bioproducts such as-H 2 , butanediols; polyhydroxyalkanoates, citric acid, vitamins, enzymes, etc. from biowastes/lignocellulosic substrates have been planned to flourish in a multi-step process or as a "Biorefinery". Electro-fermentation (EF) is one such technology that has attracted much interest due to its ability to boost the microbial metabolism through extracellular electron transfer during fermentation. It has been studied on various acetogens and methanogens, where the enhancement in the biogas yield reached up to 2-fold. EF holds the potential to be used with complex organic materials, leading to the biosynthesis of value-added products at an industrial scale.

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Section: Hydrogenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electro-Fermentation in Aid of Bioenergy and Biopolymers

et al. 2018

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“…Nickel foam with Pt as the catalyst promoted H 2 yield to 0.71 m 3 m −3 day −1 under the applied supply of 0.8 V . More recently, extensive studies have been carried out on other types of metals and nanostructured materials for H 2 production in MECs . Jeon et al .…”

Section: Applications Of the Microbial Electrolysis Cellmentioning

confidence: 99%

Microbial electrolysis cell as an emerging versatile technology: a review on its potential application, advance and challenge

Hua

et al. 2019

J of Chemical Tech & Biotech

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Microbial electrolysis cells (MECs) have been studied in a wide range of potential applications such as recalcitrant pollutants removal, chemicals synthesis, resources recovery and biosensors. However, MEC technology is still in its infancy and poses serious challenges for practical large‐scale applications. To understand the diversified applications of MEC, this review aims to explore MEC applications in the following contexts: an overview of MEC for energy generation and recycling such as hydrogen, methane, formic acid and hydrogen peroxide; contaminant removal, specifically complex organic pollutants and inorganic pollutants; as a sensor; as well as resource recovery. New concepts of MEC technology; configuration optimization; electron transfer pathways in biocathodes, and coupling with other technologies for value‐added applications such as MEC‐anaerobic digestion, MEC‐MFC, MEC‐MDC and bio‐E‐Fenton system are discussed. Finally, challenges and outlooks are suggested. The review aims to assist researchers and engineers to understand the latest trends in MEC technologies and applications. © 2018 Society of Chemical Industry

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“…Cluster V-3 "Methane production by MEC" investigated the conversion of organic waste or CO2 into methane by MEC [108]. Methane production is inevitable in MEC, because the growth of methanogens is fast, although methane production can be suppressed if the hydrogen production rate is high enough [109]. Methane production is usually a problem as it can contaminate produced hydrogen.…”

Section: Perspective and Emerging Technologies Of Cluster V "Mec"mentioning

confidence: 99%

“…Nafion is generally utilized as a separator membrane and transport proton. However, it can induce a pH gradient on both the anode and cathode, resulting in overpotential [109], and the cost of electrolytes for large-scale operation of this process is expensive. To avoid the above challenges, membrane-less MEC has been studied.…”

Section: Perspective and Emerging Technologies Of Cluster V "Mec"mentioning

confidence: 99%

Analysis of Trends and Emerging Technologies in Water Electrolysis Research Based on a Computational Method: A Comparison with Fuel Cell Research

2018

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Abstract:Water electrolysis for hydrogen production has received increasing attention, especially for accumulating renewable energy. Here, we comprehensively reviewed all water electrolysis research areas through computational analysis, using a citation network to objectively detect emerging technologies and provide interdisciplinary data for forecasting trends. The results show that all research areas increase their publication counts per year, and the following two areas are particularly increasing in terms of number of publications: "microbial electrolysis" and "catalysts in an alkaline water electrolyzer (AWE) and in a polymer electrolyte membrane water electrolyzer (PEME).". Other research areas, such as AWE and PEME systems, solid oxide electrolysis, and the whole renewable energy system, have recently received several review papers, although papers that focus on specific technologies and are cited frequently have not been published within the citation network. This indicates that these areas receive attention, but there are no novel technologies that are the center of the citation network. Emerging technologies detected within these research areas are presented in this review. Furthermore, a comparison with fuel cell research is conducted because water electrolysis is the reverse reaction to fuel cells, and similar technologies are employed in both areas. Technologies that are not transferred between fuel cells and water electrolysis are introduced, and future water electrolysis trends are discussed.

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Recent advances and emerging challenges in microbial electrolysis cells (MECs) for microbial production of hydrogen and value-added chemicals

Cited by 347 publications

References 257 publications

Electro-Fermentation in Aid of Bioenergy and Biopolymers

Electro-Fermentation in Aid of Bioenergy and Biopolymers

Microbial electrolysis cell as an emerging versatile technology: a review on its potential application, advance and challenge

Analysis of Trends and Emerging Technologies in Water Electrolysis Research Based on a Computational Method: A Comparison with Fuel Cell Research

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