Moving towards the enhancement of extracellular electron transfer in electrogens

Verma, Manisha; Singh, Vishal; Mishra, Vishal

doi:10.1007/s11274-023-03582-8

Cited by 10 publications

(4 citation statements)

References 176 publications

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“…Electroactive microbes, such as Shewanella and Geobacter, played a crucial role in converting the chemical energy of wastewater into electricity. These microbial species have been extensively studied for their extracellular electron transfer mechanisms [97]. In addition, Clostridium and Pseudomonas were also commonly inoculated in BES as electrogenic microorganisms [98].…”

Section: The Feed Solutionmentioning

confidence: 99%

Simultaneous Wastewater Treatment and Resources Recovery by Forward Osmosis Coupled with Microbial Fuel Cell: A Review

Zhang,

Duan,

et al. 2024

Membranes

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Osmotic microbial fuel cells (OsMFCs) with the abilities to simultaneously treat wastewater, produce clean water, and electricity provided a novel approach for the application of microbial fuel cell (MFC) and forward osmosis (FO). This synergistic merging of functions significantly improved the performances of OsMFCs. Nonetheless, despite their promising potential, OsMFCs currently receive inadequate attention in wastewater treatment, water reclamation, and energy recovery. In this review, we delved into the cooperation mechanisms between the MFC and the FO. MFC facilitates the FO process by promoting water flux, reducing reverse solute flux (RSF), and degrading contaminants in the feed solution (FS). Moreover, the water flux based on the FO principle contributed to MFC’s electricity generation capability. Furthermore, we summarized the potential roles of OsMFCs in resource recovery, including nutrient, energy, and water recovery, and identified the key factors, such as configurations, FO membranes, and draw solutions (DS). We prospected the practical applications of OsMFCs in the future, including their capabilities to remove emerging pollutants. Finally, we also highlighted the existing challenges in membrane fouling, system expansion, and RSF. We hope this review serves as a useful guide for the practical implementation of OsMFCs.

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Section: The Feed Solutionmentioning

confidence: 99%

Simultaneous Wastewater Treatment and Resources Recovery by Forward Osmosis Coupled with Microbial Fuel Cell: A Review

Zhang,

Duan,

et al. 2024

Membranes

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“…The repetitive cycling of a solitary shuttle molecule can significantly influence the turnover rate of the terminal oxidant, such as iron, within a specific situation. Compounds such as humic compounds, quinones, phenazines, and molecules containing thiols have the potential to fulfil this function [26][27][28][29]. Electron shuttles can be classified into two distinct categories, specifically exogenous and endogenous, depending on their presence in the environment or the inherent ability of the cell to produce them.…”

Section: Indirect Electron Transfer (Iet)mentioning

confidence: 99%

Strategies for Enhancing Extracellular Electron Transfer in Environmental Biotechnology: A Review

Hazzan,

Zhao,

Xiao

2023

Applied Sciences

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Extracellular electron transfer (EET) is a biological mechanism that plays a crucial role in various bioelectrochemical systems (BESs) and has substantial implications for renewable energy production. By utilizing the metabolic capacities of exoelectrogens, BESs offer a viable and environmentally friendly approach to electricity generation and chemical production; however, the diminished effectiveness of EET remains a hindrance to their optimal application in practical contexts. This paper examines the various strategies that have the potential to be employed to enhance the efficiency of EET systems and explores the potential for the integration of BESs technology with contemporary technologies, resulting in the development of an enhanced and sustainable system. It also examines how quorum sensing, electrode modifications, electron shuttles, and mediators can aid in improving EET performance. Many technological innovations, such as additive manufacturing, the science of nanotechnology, the technique of genetic engineering, computational intelligence, and other combinations of technologies that can be used to augment the efficacy of BESs are also discussed. Our findings will help readers understand how BESs, though an evolving technology, can play an important role in addressing our environmental concerns. Technical constraints are identified, and future directions in the field of EET are suggested.

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“…The synthesis of EPS has been pointed to be a key factor in achieve an effective microbial adhesion to ores in natural environments (Costa et al 2018) or electrodes in bioelectrochemical systems (Verma et al 2023). Despite rhamnose being a rare sugar (Roca et al 2015), Acinetobacter calcoaceticus (Bryan et al 1986) and Pseudomonas fluorescens (Fett et al 1989) also produce EPS composed of rhamnose, mannose and glucose residues; derived from UDP-glucose (Li et al 2020).…”

Section: Eps Analysismentioning

confidence: 99%

Production of poly (3-hydroxybutyrate) and extracellular polymeric substances from glycerol by the acidophile Acidiphilium cryptum

González,

Zuleta,

Zamora

et al. 2023

Extremophiles

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Acidiphilium cryptum is an acidophilic, heterotrophic, and metallotolerant bacteria able to use dissolved oxygen or Fe(III) as an electron sink. The ability of this extremophile to accumulate poly(3-hydroxybutyrate) (PHB) and secrete extracellular polymeric substances (EPS) has also been reported. Hence, the aim of this work is to characterize the production of PHB and EPS by the wild strain DSM2389 using glycerol in shaken flasks and bioreactor. Results showed that maximum PHB accumulation (37-42% w/w) was obtained using glycerol concentrations of 9 and 15 g L −1 , where maximum dry cell weight titers reached 3.6 and 3.9 g L −1 , respectively. The culture in the bioreactor showed that PHB accumulation takes place under oxygen limitation, while the redox potential of the culture medium could be used for online monitoring of the PHB production. Recovered EPS was analyzed by Fourier-transform infrared spectroscopy and subjected to gas chromatography-mass spectrometry after cleavage and derivatization steps. These analyses showed the presence of sugars which were identified as mannose, rhamnose and glucose, in a proportion near to 3.2:2.3:1, respectively. Since glycerol had not been used in previous works, these findings suggest the potential of A. cryptum to produce biopolymers from this compound at a large scale with a low risk of microbial contamination due to the low pH of the fermentation process.

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Moving towards the enhancement of extracellular electron transfer in electrogens

Cited by 10 publications

References 176 publications

Simultaneous Wastewater Treatment and Resources Recovery by Forward Osmosis Coupled with Microbial Fuel Cell: A Review

Simultaneous Wastewater Treatment and Resources Recovery by Forward Osmosis Coupled with Microbial Fuel Cell: A Review

Strategies for Enhancing Extracellular Electron Transfer in Environmental Biotechnology: A Review

Production of poly (3-hydroxybutyrate) and extracellular polymeric substances from glycerol by the acidophile Acidiphilium cryptum

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