Special Issue "Anaerobic Fermentation – a Biological Route towards Achieving Net Neutrality"

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

Deadline for manuscript submissions: 30 November 2022 | Viewed by 1882

Special Issue Editor

Dr. Sanjay Nagarajan
E-Mail Website
Guest Editor
1. Sustainable Environment Research Centre, University of South Wales, 9 Graig Fach, Pontypridd CF37 4BB, Wales, UK
2. School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, Northern Ireland, UK
Interests: biomass pre-treatment; anaerobic digestion; biorefinery; hydrodynamic cavitation; photocatalysis; advanced oxidation processes

Special Issue Information

Dear Colleagues,

The international community adopted the Paris Agreement in 2015 to address climate change by keeping the increase in the mean global temperature to less than 2 ℃ above pre-industrial levels. The increase in mean global temperature is directly linked to the green house gas emissions leading to global warming. Therefore, a strong emphasis was put on net neutrality in the Paris Agreement, followed by its secondment in the recently concluded COP26. To achieve net neutrality, a sustainable circular economy approach is preferred. Amongst the available options, biological routes and especially the ‘Anaerobic Fermentation’ route have immense potential to contribute to net neutrality. This ranges from the production of biogas, biohythane, biohydrogen, or volatile fatty acids from anaerobic digestion to classical alcohol/solvent fermentation for the production of biobased solvents and biofuels, such as bioethanol and biobutanol. Beyond these products, novel high-value biorenewable platform chemicals can also be produced via ‘Anaerobic Fermentation’, thereby maximising their potential. In contrast to conventional feedstocks, to support a circular economy it is paramount that the current generation of ‘Anaerobic Fermentation’ focuses on organic wastes/waste gas streams as feedstocks to produce these products to enable net neutrality.

This Special Issue will therefore exclusively focus on innovative research outputs, short communications, and perspective reviews on the production of biofuels and high-value biorenewables via anaerobic fermentation to support net neutrality. The use of biomass pre-treatments to support/enhance fermentation product yields are also of interest. Full-length review articles are also encouraged, but the authors are required to contact the editor to discuss the topic before submission.

Dr. Sanjay Nagarajan
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 1800 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

  • anaerobic digestion
  • biogas
  • biohydrogen
  • biohythane
  • biomass pre-treatment
  • volatile fatty acids
  • gas fermentation
  • high value chemicals (renewable)
  • renewable platform chemicals
  • anaerobic biorefineries
  • microbial electrosynthesis
  • life cycle assessment
  • techno-economic analysis

Published Papers (3 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

Article
Sequencing Batch Reactor Performance Evaluation on Orthophosphates and COD Removal from Brewery Wastewater
Fermentation 2022, 8(7), 296; https://0-doi-org.brum.beds.ac.uk/10.3390/fermentation8070296 - 23 Jun 2022
Viewed by 278
Abstract
The discharge of industrial effluent constituting high orthophosphates and organic pollutants in water receiving bodies compromises freshwater quality and perpetuates eutrophication. In this study, an anaerobic–aerobic sequencing batch reactor (SBR) under activated sludge was investigated for orthophosphates and chemical oxygen demand (COD) removal [...] Read more.
The discharge of industrial effluent constituting high orthophosphates and organic pollutants in water receiving bodies compromises freshwater quality and perpetuates eutrophication. In this study, an anaerobic–aerobic sequencing batch reactor (SBR) under activated sludge was investigated for orthophosphates and chemical oxygen demand (COD) removal from brewery wastewater. Raw brewery wastewater samples were collected on a daily basis for a period of 4 weeks. The findings of the study are reported based on overall removal efficiencies recording 69% for orthophosphates and 54% for total COD for a sludge retention time (SRT) of 7 days and hydraulic retention time of 18 h at mesophilic temperature conditions of ±25 °C. Moreover, the SBR system showed stability on orthophosphate removal at a SRT ranging from 3 to 7 days with a variation in organic volumetric loading rate ranging from 1.14 to 4.83 kg COD/m3.day. The anaerobic reaction period was experimentally found to be 4 h with the aerobic phase lasting for 14 h. The SBR system demonstrated feasibility on orthophosphates and COD removal with variation in organic loading rate. Full article
Show Figures

Figure 1

Article
Increasing Anaerobic Digestion Efficiency Using Food-Waste-Based Biochar
Fermentation 2022, 8(6), 282; https://0-doi-org.brum.beds.ac.uk/10.3390/fermentation8060282 - 16 Jun 2022
Viewed by 364
Abstract
The efficiency of methane production by anaerobic digestion (AD), during which energy is generated from organic waste, can be increased in various ways. Recent research developments have increased the volume of gas production during AD using biochar. Previous studies have used food waste [...] Read more.
The efficiency of methane production by anaerobic digestion (AD), during which energy is generated from organic waste, can be increased in various ways. Recent research developments have increased the volume of gas production during AD using biochar. Previous studies have used food waste itself in AD, or, added wood-biochar or sewage sludge charcoal as an accelerant of the AD process. The application of food-waste biochar in AD using activated sludge has not yet been studied and is considered a potential method of utilizing food waste. Therefore, this study investigated the use of biochar prepared by the thermal decomposition of food waste as an additive to AD tanks to increase methane production. The addition of food-waste biochar at 1% of the digestion tank volume increased the production of digestion gas by approximately 10% and methane by 4%. We found that food-waste biochar served as a medium with trace elements that promoted the proliferation of microorganisms and increased the efficiency of AD. Full article
Show Figures

Figure 1

Article
Microbial Communities in Underground Gas Reservoirs Offer Promising Biotechnological Potential
Fermentation 2022, 8(6), 251; https://0-doi-org.brum.beds.ac.uk/10.3390/fermentation8060251 - 26 May 2022
Viewed by 631
Abstract
Securing new sources of renewable energy and achieving national self-sufficiency in natural gas have become increasingly important in recent times. The study described in this paper focuses on three geologically diverse underground gas reservoirs (UGS) that are the natural habitat of methane-producing archaea, [...] Read more.
Securing new sources of renewable energy and achieving national self-sufficiency in natural gas have become increasingly important in recent times. The study described in this paper focuses on three geologically diverse underground gas reservoirs (UGS) that are the natural habitat of methane-producing archaea, as well as other microorganisms with which methanogens have various ecological relationships. The objective of this research was to describe the microbial metabolism of methane in these specific anoxic environments during the year. DNA sequencing analyses revealed the presence of different methanogenic communities and their metabolic potential in all sites studied. Hydrogenotrophic Methanobacterium sp. prevailed in Lobodice UGS, members of the hydrogenotrophic order Methanomicrobiales predominated in Dolní Dunajovice UGS and thermophilic hydrogenotrophic members of the Methanothermobacter sp. were prevalent in Tvrdonice UGS. Gas composition and isotope analyses were performed simultaneously. The results suggest that the biotechnological potential of UGS for biomethane production cannot be neglected. Full article
Show Figures

Graphical abstract

Back to TopTop