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Fermentation
Special Issues
Electro-Fermentation (EF) for the Production of Biofuels and Biochemicals
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Electro-Fermentation (EF) for the Production of Biofuels and Biochemicals

A special issue of Fermentation (ISSN 2311-5637). This special issue belongs to the section "Industrial Fermentation".

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 2912

Special Issue Editors

Dr. Xiayuan Wu

E-Mail Website
Guest Editor
College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China
Interests: bioelectrochemical system; electro-fermentation; wastewater treatment; biomass recycling use; bacterial quorum sensing
Special Issues, Collections and Topics in MDPI journals
Dr. Yonglan Xi

E-Mail Website
Guest Editor
Jiangsu Academy of Agriculture Sciences, Nanjing, China
Interests: agricultural wastes; anaerobic digestion; biogas; methane; electrochemistry; nano materials

Special Issue Information

Dear Colleagues,

Electro-fermentation (EF) is a novel bioelectrochemical system that merges traditional industrial fermentation and electrochemistry. Using polarized electrodes as electron acceptors or/and donors during traditional fermentation processes, microbial catalysts can steer the reaction rate, output, titer, and product type. The potential of this technology has garnered recent extensive interest worldwide. A variety of valuable products have been generated using EF, including methane, hydrogen, organic acids, alcohols, amino acids, biopolymers, etc. Understanding the biochemical, molecular biological, electron transfer, and engineering features of this system is of great significance for the introduction of EF to the fuel and chemical markets, leading to the establishment of a low-carbon economy. 

This Special Issue will publish both recent research results and review papers on the fundamental and upscaling aspects of EF technology, including but not limited to: electrode interface reactions, electron transfer mechanisms, electrode materials, applied microbial cultures, substrates and products, reactor design, and industrial process control in EF.

Dr. Xiayuan Wu
Dr. Yonglan Xi
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fermentation is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • bioelectrochemical system
  • industrial fermentation
  • anodic electro-fermentation
  • cathodic electro-fermentation
  • biofuels
  • biochemicals
  • low-carbon economy
  • synthetic biology
  • extracellular electron transfer
  • biomass

Published Papers (2 papers)

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Research

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17 pages, 4948 KiB  
Article
Enhanced CO2 Reduction by Electron Shuttle Molecules via Coupling Different Electron Transport Processes in Microbial Electrosynthesis
by Jie Zhang, He Liu, Yan Zhang, Bo Fu, Chao Zhang, Minhua Cui, Ping Wu and Chongjun Chen
Fermentation 2023, 9(7), 679; https://doi.org/10.3390/fermentation9070679 - 19 Jul 2023
Cited by 2 | Viewed by 1165
Abstract
Electron shuttling molecules (ESMs) have been proven to accelerate the electron transfer from the electrode to the electroactive microorganism in microbial electrosynthesis (MES) for higher CO2 reduction or chemical production rate. However, the microbial electron acceptors of electroactive microorganisms and their responses [...] Read more.
Electron shuttling molecules (ESMs) have been proven to accelerate the electron transfer from the electrode to the electroactive microorganism in microbial electrosynthesis (MES) for higher CO2 reduction or chemical production rate. However, the microbial electron acceptors of electroactive microorganisms and their responses to different electron shuttling molecules in MES were still unknown. In this study, three kinds of ESMs, e.g., riboflavin (B2), methyl viologen (MV) and neutral red (NR) were applied in the MES for acetate production to explore the mechanism of different ESMs on microbial interactions. The acetate concentrations were 41% and 51% higher than that of the control in B2 and NR addition. The acetogens relative abundances of control, B2, MV and NR were 0.29%, 5.68%, 22.78% and 42.89%, respectively. The microbial function profile of the microbial community on the biocathodes indicated that the performance of acetate production was more closely related to the expression of electron transport. The B2 was coupled with the NADH complex and hydrogenase, while MV and NR were coupled with the Rnf complex to support electron transfer and energy conversion via various electron transfer pathways. The study revealed that the ESMs coupled with different electron transport complexes of microorganisms to achieve electron transfer, resulting in product changes. Full article
(This article belongs to the Special Issue Electro-Fermentation (EF) for the Production of Biofuels and Biochemicals)
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Review

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23 pages, 2599 KiB  
Review
Advances in the Application of Quorum Sensing to Regulate Electrode Biofilms in Bioelectrochemical Systems
by Shen Wang, Xinglei Zhuang, Weiliang Dong, Fengxue Xin, Honghua Jia and Xiayuan Wu
Fermentation 2023, 9(7), 625; https://doi.org/10.3390/fermentation9070625 - 30 Jun 2023
Cited by 2 | Viewed by 1405
Abstract
Bioelectrochemical systems (BESs) are an emerging technology for wastewater treatment and resource recovery. These systems facilitate electron transfer between microorganisms and electrodes, enabling their application in various fields, such as electricity production, bioremediation, biosensors, and biocatalysis. However, electrode biofilms, which play a critical [...] Read more.
Bioelectrochemical systems (BESs) are an emerging technology for wastewater treatment and resource recovery. These systems facilitate electron transfer between microorganisms and electrodes, enabling their application in various fields, such as electricity production, bioremediation, biosensors, and biocatalysis. However, electrode biofilms, which play a critical role in BESs, face several challenges (e.g., a long acclimation period, low attached biomass, high electron transfer resistance, and poor tolerance and stability) that limit the development of this technology. Quorum sensing (QS) is a communication method among microorganisms that can enhance the performance of BESs by regulating electrode biofilms. QS regulation can positively impact electrode biofilms by enhancing extracellular electron transfer (EET), biofilm formation, cellular activity, the secretion of extracellular polymeric substances (EPS), and the construction of microbial community. In this paper, the characteristics of anode electrogenic biofilms and cathode electrotrophic biofilms in BESs, EET mechanisms, and the main factors affecting biofilm formation were summarized. Additionally, QS regulation mechanisms for biofilm formation, strategies for enhancing and inhibiting QS, and the application of QS regulation for electrode biofilms in BESs were systematically reviewed and discussed. This paper provides valuable background information and insights for future research and development of BES platforms based on QS regulation of electrode biofilms. Full article
(This article belongs to the Special Issue Electro-Fermentation (EF) for the Production of Biofuels and Biochemicals)
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