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Fermentation
Special Issues
Fermentative Biohydrogen Production
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Fermentative Biohydrogen Production

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 2680

Special Issue Editor

Dr. Jinling Cai

E-Mail Website
Guest Editor
Key Laboratory of Brine Chemical Engineering and Resource Eco-Utilization, College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, Tianjin, China
Interests: biological hydrogen production; photosynthetic bacteria; dark fermentation; biotechnology enzymes; bioremediation

Special Issue Information

Dear Colleagues,

Fermentative hydrogen production from different waste materials is a promising approach to produce bio-energy in terms of renewable energy exploration, which is under extensive investigation worldwide. A wide variety of organic wastes can be used as feedstock for hydrogen production in fermentation, thus providing an added advantage of waste recycling. However, the process of fermentation is essentially restricted by the low yields of hydrogen, so advancements are still necessary. Extensive research has been conducted to overcome such bottlenecks. Various technologies have been used to improve the fermentative hydrogen yield, including bacterial strain, substrate, reactor design, metabolic engineering and two-stage processes; pretreatment of the seed sludge; optimization of the bioprocess parameters (e.g., temperature, pH, organic loading rate, hydraulic retention time, effluent recycling ratio, nitrogen, phosphate, metal ion), etc.

The goal of this Special Issue is to publish both recent innovative research results, as well as review papers, on fermentative hydrogen production. Review and research papers on microbiology, biochemistry and enzymology for fermentative hydrogen production are also of interest. If you would like to contribute a review paper, please contact one of the editors to discuss the topic's relevance before submitting the manuscript.

Dr. Jinling Cai
Guest Editor

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

  • biological hydrogen production
  • bacteria
  • bioreactor
  • metabolic engineering
  • two-stage process
  • pretreatment
  • bioprocess parameters
  • substrate
  • organic wastes
  • fermentation

Published Papers (3 papers)

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Research

13 pages, 5694 KiB  
Article
Biohydrogen, Volatile Fatty Acids, and Biomethane from Mezcal Vinasses—A Dark Fermentation Process Evaluation
by Sergio A. Díaz-Barajas, Iván Moreno-Andrade, Edson B. Estrada-Arriaga, Liliana García-Sánchez and Marco A. Garzón-Zúñiga
Fermentation 2024, 10(4), 217; https://doi.org/10.3390/fermentation10040217 - 16 Apr 2024
Viewed by 604
Abstract
Mezcal is a drink made in Mexico, the production of which generates vinasses with a high content of organic matter (OM) that is not utilized. However, these residues have the potential to be drawn upon in dark fermentation (DF) processes to obtain biogas [...] Read more.
Mezcal is a drink made in Mexico, the production of which generates vinasses with a high content of organic matter (OM) that is not utilized. However, these residues have the potential to be drawn upon in dark fermentation (DF) processes to obtain biogas rich in biohydrogen, biomethane, and volatile fatty acids (VFAs) with the potential to become biofuels. In the present work, the effect of reaction time (RT) and organic load (OL) was assessed based on the efficiency of removing OM, the production of VFAs, and the generation and composition of biogas in a process of DF fed with mezcal vinasses. The results show that increasing the RT and decreasing the OL increases COD removal but decreases biohydrogen production. The maximum production of H2 (64 ± 21 NmL H2/Lreactor) was obtained with the lowest RT (1 d) and the highest OL (13.5 gCODm3d−1), while the highest accumulation of VFAs (2007 ± 327 mg VFA/L) was obtained with an RT of 3 d. It was determined that RT and OL are key parameters in DF processes for biohydrogen and VFA production. Full article
(This article belongs to the Special Issue Fermentative Biohydrogen Production)
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19 pages, 1729 KiB  
Article
Specific Organic Loading Rate Control for Improving Fermentative Hydrogen Production
by Mélida del Pilar Anzola-Rojas, Lucas Tadeu Fuess and Marcelo Zaiat
Fermentation 2024, 10(4), 213; https://doi.org/10.3390/fermentation10040213 - 14 Apr 2024
Viewed by 545
Abstract
Inhibiting homoacetogens is one of the main challenges in fermentative hydrogen production because these hydrogen consumers have similar growth features to hydrogen producers. Homoacetogens have been related to the excessive accumulation of biomass in fermentative reactors. Therefore, a suitable food/microorganism ratio has the [...] Read more.
Inhibiting homoacetogens is one of the main challenges in fermentative hydrogen production because these hydrogen consumers have similar growth features to hydrogen producers. Homoacetogens have been related to the excessive accumulation of biomass in fermentative reactors. Therefore, a suitable food/microorganism ratio has the potential to minimize the homoacetogenic activity. In this work, the specific organic loading rate (SOLR) was controlled in two fermentative fixed-bed up-flow reactors through scheduled biomass discharges. Reactors were differentiated by the bed arrangement, namely, packed and structured conformation. The SOLR decay along the time in both reactors was previously simulated according to the literature data. The volume and volatile suspended solids (VSS) concentration of discharges was estimated from the first discharge, and then additional discharges were planned. Biomass discharges removed 21% of the total biomass produced in the reactors, maintaining SOLR values of 3.0 ± 0.4 and 3.9 ± 0.5 g sucrose g−1 VSS d−1 in the packed-bed and structured-bed reactors, respectively. Such a control of the SOLR enabled continuous and stable hydrogen production at 2.2 ± 0.2 L H2 L−1 d−1 in the packed-bed reactor and 1.0 ± 0.3 L H2 L−1 d−1 in the structured-bed one. Controlling biomass was demonstrated to be a suitable strategy for keeping the continuous hydrogen production, although the fermentative activity was impaired in the structured-bed reactor. The homoacetogenic was partially inhibited, accounting for no more than 30% of the total acetic acid produced in the reactor. Overall, the high amount of attached biomass in the packed-bed reactor provided more robustness to the system, offsetting the periodic suspended biomass losses via the planned discharges. Better characterizing both the VSS composition (aiming to differentiate cells from polymeric substances) and the bed hydrodynamics could be useful to optimize the online SOLR control. Full article
(This article belongs to the Special Issue Fermentative Biohydrogen Production)
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16 pages, 3080 KiB  
Article
Dark Fermentation in the Dark Biosphere: The Case of Citrobacter sp. T1.2D-12
by Violeta Gallego-Rodríguez, Adrián Martínez-Bonilla, Nuria Rodríguez and Ricardo Amils
Fermentation 2023, 9(10), 887; https://doi.org/10.3390/fermentation9100887 - 30 Sep 2023
Viewed by 1129
Abstract
Microbial diversity that thrives in the deep subsurface remains largely unknown. In this work, we present the characterization of Citrobacter sp. T1.2D-1, isolated from a 63.6 m-deep core sample extracted from the deep subsurface of the Iberian Pyrite Belt (IPB). A genomic analysis [...] Read more.
Microbial diversity that thrives in the deep subsurface remains largely unknown. In this work, we present the characterization of Citrobacter sp. T1.2D-1, isolated from a 63.6 m-deep core sample extracted from the deep subsurface of the Iberian Pyrite Belt (IPB). A genomic analysis was performed to identify genes that could be ecologically significant in the IPB. We identified all the genes that encoded the formate–hydrogen lyase and hydrogenase-2 complexes, related to hydrogen production, as well as those involved in glycerol fermentation. This is particularly relevant as some of the substrates and byproducts of this process are of industrial interest. Additionally, we conducted a phylogenomic study, which led us to conclude that our isolate was classified within the Citrobacter telavivensis species. Experimentally, we verified the strain’s ability to produce hydrogen from glucose and glycerol and, thus, of performing dark fermentation. Moreover, we assessed the activity of the nitrate and tetrathionate reductase complexes and the isolate’s ability to tolerate high concentrations of heavy metals, especially Zn. These results suggest that C. telavivensis T1.2D-1 can play a role in the carbon, hydrogen, iron, nitrogen, and sulfur cycles that occur in the deep subsurface of the IPB, making it a candidate worthy of further study for possible biotechnological applications. Full article
(This article belongs to the Special Issue Fermentative Biohydrogen Production)
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