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Special Issue "Advances in Fermentative Hydrogen Production"

A special issue of Energies (ISSN 1996-1073).

Deadline for manuscript submissions: 31 December 2017

Special Issue Editors

Guest Editor
Dr. Patrícia Moura

Laboratório Nacional de Energia e Geologia, Unidade de Bioenergia, Estrada do Paço do Lumiar, 22, 1649-038 Lisboa, Portugal
Website | E-Mail
Phone: +351-210-924-600 (ext. 4310)
Interests: anaerobic microorganisms; fermentative hydrogen production; biochemical biorefinery; bioenergy and bio-based products
Guest Editor
Dr. Idania Valdez-Vazquez

Unidad Académica Juriquilla Instituto de Ingeniería, Universidad Nacional Autónoma de México, Blvd. Juriquilla 3001, Juriquilla, 72630, Querétaro, México
Website | E-Mail
Phone: + 52 (442)1926170
Interests: cellulosic refineries; environmental biotechnology; sustainability in agrosystems for bioenergy production

Special Issue Information

Dear Colleagues,

The intention of launching this Special Issue is to disclose the latest developments in fermentative hydrogen production. The theme has been exhaustively investigated over more than a decade; however, this technology is still waiting for the scaling up of cost-effective processes.

What are the challenges that fermentative hydrogen processes face to reach maturity? To help us answering this question, we kindly invite you to contribute to this Special Issue, covering the following topics:

Biomass: the search for new, inexpensive and widely available biomass resources, especially those that represent waste streams, the use of multifeedstock combinations that may help overcome process scale constraints, additional aspects related with sustainability and logistics of the biomass feedstock are exemplary issues to address, that may bring new perspectives to the study of biohydrogen production.

Microorganisms: low productivity and robustness are the major challenges in the scale up of the fermentative hydrogen production. This Special Issue invites articles including, but not limited to, novel hydrogen-producing microorganisms with improved characteristics for the establishment of robust and productive hydrogen processes. Articles which deal with the latest hot topics in synthetic biology including artificial genes, metabolic engineering of strains, as well as definition and monitoring of engineered microbial consortia, and possibly the development of certified starters are of special interest. Additionally, articles which discuss bioaugmentation strategies to outperform natural microbial consortia are welcome.

Production and aplications: articles focusing advances in process optimization, introducing innovative and more efficient schemes of process integration, including fuel cell applications, disclosing new potential applications that comprise, e.g., ecentralized production possibilities, exploring the development of hydrogen biorefineries and the contribution of co-metabolites production, and reporting a realistic appraisal of the technological and economic viability of biological hydrogen production, are invited.

Dr. Patrícia Moura
Dr. Idania Valdez-Vazquez
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 papers will be 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. Energies 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 1500 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.


  • biohydrogen
  • dark fermentation
  • hydrogen-producing strains
  • microbial consortia
  • bioaugmentation
  • synthetic biology
  • biomass feedstock
  • waste and byproducts
  • hydrogen biorefinery
  • sustainability

Published Papers (1 paper)

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Open AccessFeature PaperArticle Development of an Energy Biorefinery Model for Chestnut (Castanea sativa Mill.) Shells
Energies 2017, 10(10), 1504; doi:10.3390/en10101504
Received: 11 August 2017 / Revised: 20 September 2017 / Accepted: 22 September 2017 / Published: 27 September 2017
PDF Full-text (923 KB) | HTML Full-text | XML Full-text
Chestnut shells (CS) are an agronomic waste generated from the peeling process of the chestnut fruit, which contain 2.7–5.2% (w/w) phenolic compounds and approximately 36% (w/w) polysaccharides. In contrast with current shell waste burning practices,
[...] Read more.
Chestnut shells (CS) are an agronomic waste generated from the peeling process of the chestnut fruit, which contain 2.7–5.2% (w/w) phenolic compounds and approximately 36% (w/w) polysaccharides. In contrast with current shell waste burning practices, this study proposes a CS biorefinery that integrates biomass pretreatment, recovery of bioactive molecules, and bioconversion of the lignocellulosic hydrolyzate, while optimizing materials reuse. The CS delignification and saccharification produced a crude hydrolyzate with 12.9 g/L of glucose and xylose, and 682 mg/L of gallic acid equivalents. The detoxification of the crude CS hydrolyzate with 5% (w/v) activated charcoal (AC) and repeated adsorption, desorption and AC reuse enabled 70.3% (w/w) of phenolic compounds recovery, whilst simultaneously retaining the soluble sugars in the detoxified hydrolyzate. The phenols radical scavenging activity (RSA) of the first AC eluate reached 51.8 ± 1.6%, which is significantly higher than that of the crude CS hydrolyzate (21.0 ± 1.1%). The fermentation of the detoxified hydrolyzate by C. butyricum produced 10.7 ± 0.2 mM butyrate and 63.9 mL H2/g of CS. Based on the obtained results, the CS biorefinery integrating two energy products (H2 and calorific power from spent CS), two bioproducts (phenolic compounds and butyrate) and one material reuse (AC reuse) constitutes a valuable upgrading approach for this yet unexploited waste biomass. Full article
(This article belongs to the Special Issue Advances in Fermentative Hydrogen Production)

Figure 1

Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Lactic Acid Adsorption from Model Fermentation Broth by Granular Activated Carbon and Anionic Resins
Nirakar Pradhan a,b,*, Eldon R. Rene b, Antonio Panico c, Laura Dipasquale d, Giuliana d’Ippolito d, Angelo Fontana d, Piet N. L. Lens b and Giovanni Esposito a
Solid-liquid extraction (adsorption or ion exchange) is a promising approach for the in situ separation of organic acids from fermentation broths. In this study, lactic acid (<10 g/L) separation from a model fermentation broth by granular activated carbon (GAC) as well as weak (Reillex® 425 or RLX425) and strong (Amberlite® IRA-400 or AMB400) base anion exchange resins under various operating conditions was experimentally investigated. Thermodynamic analysis showed that the best lactic acid adsorption performances were obtained at a pH below the pKa value of lactic acid (i.e., 3.86) for GAC and RLX425 by physical adsorption mechanism and above the pKa value for the AMB400 resin by ion exchange mechanism, respectively. The adsorption capacity for GAC (38.2 mg/g) was the highest, followed by AMB400 (31.2 mg/g) and RLX 425 (17.2 mg/g). The Langmuir adsorption isotherm model (R2 > 0.96) and the pseudo-second order kinetic model (R2 ≈ 1) fitted well to the experimental data than the other models tested. The adsorption capacity of AMB400 resin was the highest among the different resins tested. The adsorption mechanism was spontaneous and this resin represents an ideal candidate for the in situ extraction of lactic acid during fermentation.
Keywords: lactic acid; fermentation; adsorption; kinetics; isotherms; thermodynamics; ion exchange


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