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Fermentation
Special Issues
Bioelectrochemical System for Bioenergy and Bioproducts Recovery (BBB)
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Bioelectrochemical System for Bioenergy and Bioproducts Recovery (BBB)

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

Deadline for manuscript submissions: closed (31 May 2023) | Viewed by 6506

Special Issue Editors

Dr. Dipak A. Jadhav

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Guest Editor
Department of Environmental Engineering, College of Ocean Science and Engineering, Korea Maritime and Ocean University (KMOU), 727 Taejong-ro, Yeongdo-gu, Busan 49112, Republic of Korea
Interests: environmental electrochemistry; desalination; water management; wastewater treatment; waste-to-energy recovery
Special Issues, Collections and Topics in MDPI journals
Dr. Selvaraj Gajalakshmi

E-Mail Website
Guest Editor
Centre for Pollution Control and Environmental Engineering, Pondicherry University, Kalapet, Puducherry, India
Interests: microbial fuel cells; ceramic membrane; bioelectrochemical system; biological wastewater treatment; environmental biotechnology
Dr. Soumya Pandit

E-Mail Website
Guest Editor
Department of Life Sciences, Sharda University, Greater Noida 201301, India
Interests: microbial fuel cells; microbial electrosynthesis; bioelectrochemical system; environmental electrochemistry; wastewater treatment; life cycle analysis

Special Issue Information

Dear Colleagues,

Extensive amounts of organic waste are generated through various sources, including households, industrial processes and agricultural activities. Bioelectrochemical systems are electrochemical-based technologies which utilize the energy value of wastewater for bioenergy conversion, providing a flexible platform for various electrochemical redox reactions through the employment of bacteria as a biocatalyst. Bioenergy and valuable resources, such as electricity, biohydrogen, volatile fatty acids, short-chain acids, biopolymers, bioplastics, alcohol and chemicals of industrial importance, can be recovered effectively through BES. Based on applications, BES can be classified to include microbial fuel cells, microbial electrolysis cells, bioelectrosynthesis, microbial desalination, recovery cells and integrated system. It has an array of applications in the environmental engineering domain, including wastewater treatment, contaminant removal; acid, alcohol and gas production; biosensor applications, external power source, valuable byproduct recovery, sanitation, etc. However, despite the prospects of the BES technology, several bottlenecks restrict its field-scale implementation, including techno-economic feasibility, electrochemical limitations, engineering design and biological constraints, as well as understanding the microbial interactions for effective electron transfer. The main purpose of this Special Issue is to assemble original research papers and reviews highlighting the importance of scientific approaches in order to solve the above-mentioned challenges and provide novel directions for microbial electrochemical technologies. Additionally, the implications of energy recovery during wastewater treatment, industrial effluent treatment and environmental electrochemistry will also be covered in this Special Issue.

Dr. Dipak A. Jadhav
Dr. Selvaraj Gajalakshmi
Dr. Soumya Pandit
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

  • bioenergy and resource recovery from waste
  • microbial fuel cells
  • microbial electrolysis cells
  • bioelectrosynthesis
  • microbial desalination and recovery cells
  • plant microbial fuel cells and constructed wetlands
  • environmental electrochemistry
  • life cycle analysis and modelling
  • scaling-up and field applications
  • circular economy

Published Papers (3 papers)

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Research

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13 pages, 2750 KiB  
Article
Single-Chamber Electrofermentation of Rumen Fluid Increases Microbial Biomass and Volatile Fatty Acid Production without Major Changes in Diversity
by Rocío López-Hernández, Bibiana Cercado-Quezada, Haiku D. J. Gómez-Velázquez, Carolina Robles-Rodríguez, Laura González-Dávalos, Alfredo Varela-Echavarría, Armando Shimada and Ofelia Mora
Fermentation 2023, 9(6), 502; https://doi.org/10.3390/fermentation9060502 - 24 May 2023
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Abstract
Rumen fermentation (RF) is a complex system of oxidation–reduction reactions governed by the rumen microbiota, and its end-products are the volatile fatty acids (VFAs) which constitute the main energy source for the host animal. We speculated that the process could be manipulated through [...] Read more.
Rumen fermentation (RF) is a complex system of oxidation–reduction reactions governed by the rumen microbiota, and its end-products are the volatile fatty acids (VFAs) which constitute the main energy source for the host animal. We speculated that the process could be manipulated through electrofermentation (EF) by utilizing solid-state electrodes as electron sources. This study aimed to evaluate the effects of single-chamber EF applied (0.4 vs. 0.9 V) for 6, 12, or 24 h to rumen fluid on the resulting microbial biomass, dry matter digestibility (DMD), VFA production, NADH/NAD ratio, and composition of the rumen fluid’s bacterial communities. The application of a 0.9 V electric potential for 24 h produced the most significant changes in RF compared to the control treatment (0V), increasing microbial biomass (12%), DMD (58%), and VFA concentrations (~84%), and reducing NAD/NADH ratio (~50%) without a significant impact on bacterial diversity. These results suggest that the application of a 0.9 V electric potential allows the microbiota to better hydrolyze and digest the feed’s components and could offer an electron sink for the production of VFAs. Hence, EF can provide innovative solutions to a range of challenges that limit the RF process. Nonetheless, more studies are needed to understand how the solid electrodes and external electric energy function. Full article
(This article belongs to the Special Issue Bioelectrochemical System for Bioenergy and Bioproducts Recovery (BBB))
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19 pages, 3948 KiB  
Article
Cellulosic Fiber Waste Feedstock for Bioethanol Production via Bioreactor-Dependent Fermentation
by Ahmed E. Mansy, Eman El-Desouky, Hamada El-Gendi, Mohamed A. Abu-Saied, Tarek H. Taha and Ranya A. Amer
Fermentation 2023, 9(2), 176; https://doi.org/10.3390/fermentation9020176 - 15 Feb 2023
Cited by 2 | Viewed by 1803
Abstract
The bioconversion of environmental wastes into energy is gaining much interest in most developing and developed countries. The current study is concerned with the proper exploitation of some industrial wastes. Cellulosic fiber waste was selected as a raw material for producing bioethanol as [...] Read more.
The bioconversion of environmental wastes into energy is gaining much interest in most developing and developed countries. The current study is concerned with the proper exploitation of some industrial wastes. Cellulosic fiber waste was selected as a raw material for producing bioethanol as an alternative energy source. A combination of physical, chemical, and enzymatic hydrolysis treatments was applied to maximize the concentration of glucose that could be fermented with yeast into bioethanol. The results showed that the maximum production of 13.9 mg/mL of glucose was achieved when 5% cellulosic fiber waste was treated with 40% HCl, autoclaved, and followed with enzymatic hydrolysis. Using SEM and FTIR analysis, the instrumental characterization of the waste fiber treatment confirmed the effectiveness of the degradation by turning the long threads of the fibers into small pieces, in addition to the appearance of new functional groups and peak shifting. A potent yeast strain isolated from rotten grapes was identified as Starmerella bacillaris STDF-G4 (accession number OP872748), which was used to ferment the obtained glucose units into bioethanol under optimized conditions. The maximum production of 3.16 mg/mL of bioethanol was recorded when 7% of the yeast strain was anaerobically incubated at 30 °C in a broth culture with the pH adjusted to 5. The optimized conditions were scaled up from flasks to a fermentation bioreactor to maximize the bioethanol concentration. The obtained data showed the ability of the yeast strain to produce 4.13 mg/mL of bioethanol after the first 6 h of incubation and double the amount after 36 h of incubation to reach 8.6 mg/mL, indicating the efficiency of the bioreactor in reducing the time and significantly increasing the product. Full article
(This article belongs to the Special Issue Bioelectrochemical System for Bioenergy and Bioproducts Recovery (BBB))
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Review

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26 pages, 2590 KiB  
Review
Bacterial Biological Factories Intended for the Desulfurization of Petroleum Products in Refineries
by Abrar Ahmad, Mazin A. Zamzami, Varish Ahmad, Salwa Al-Thawadi, Mohammad Salman Akhtar and Mohd Jahir Khan
Fermentation 2023, 9(3), 211; https://doi.org/10.3390/fermentation9030211 - 23 Feb 2023
Cited by 5 | Viewed by 2596
Abstract
The removal of sulfur by deep hydrodesulfurization is expensive and environmentally unfriendly. Additionally, sulfur is not separated completely from heterocyclic poly-aromatic compounds. In nature, several microorganisms (Rhodococcus erythropolis IGTS8, Gordonia sp., Bacillus sp., Mycobacterium sp., Paenibacillus sp. A11-2 etc.) have been reported [...] Read more.
The removal of sulfur by deep hydrodesulfurization is expensive and environmentally unfriendly. Additionally, sulfur is not separated completely from heterocyclic poly-aromatic compounds. In nature, several microorganisms (Rhodococcus erythropolis IGTS8, Gordonia sp., Bacillus sp., Mycobacterium sp., Paenibacillus sp. A11-2 etc.) have been reported to remove sulfur from petroleum fractions. All these microbes remove sulfur from recalcitrant organosulfur compounds via the 4S pathway, showing potential for some organosulfur compounds only. Activity up to 100 µM/g dry cell weights is needed to meet the current demand for desulfurization. The present review describes the desulfurization capability of various microorganisms acting on several kinds of sulfur sources. Genetic engineering approaches on Gordonia sp. and other species have revealed a variety of good substrate ranges of desulfurization, both for aliphatic and aromatic organosulfur compounds. Whole genome sequence analysis and 4S pathway inhibition by a pTeR group inhibitor have also been discussed. Now, emphasis is being placed on how to commercialize the microbes for industrial-level applications by incorporating biodesulfurization into hydrodesulfurization systems. Thus, this review summarizes the potentialities of microbes for desulfurization of petroleum. The information included in this review could be useful for researchers as well as the economical commercialization of bacteria in petroleum industries. Full article
(This article belongs to the Special Issue Bioelectrochemical System for Bioenergy and Bioproducts Recovery (BBB))
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