Anaerobic Digestion 2.0

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Microbial Biotechnology".

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 1211

Special Issue Editor


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Guest Editor
Department of Biology, University of York, York, UK
Interests: methanogens; methanogenesis; anaerobic digestion; biogas; metagenomics; metabolomics; anaerobic microbial communities; microbiomes
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Special Issue Information

Dear Colleagues,

This Special Issue is the continuation of our 2020 Special Issue “Anaerobic Digestion”. 

Anaerobic digestion (AD) occurs when complex microbial communities catabolise organic polymers into their constituent components in the absence of oxygen. Some of the products of this process are utilised by methanogenic archaea, such as terminal electron acceptors, resulting in the production of methane. The final products of AD are biogas—a mixture mainly consisting of methane and carbon dioxide—and a nitrogen-rich digestate that can be used as fertilizer. AD is commonly used at an industrial scale for recovering resources from the organic fraction of municipal solid waste, agricultural residues, food waste, and sewage sludge. Molecular tools are increasingly being used to characterise the microorganisms found in anaerobic digesters, and to understand the variation and temporal dynamics of AD communities. This Special Issue of Microorganisms looks at how and why the AD microbial community changes in response to operating condition changes, and how interventions may result in better AD outcomes with respect to solids destruction, gas production, hydraulic retention time, and other critical parameters.

Prof. Dr. James Chong
Guest Editor

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Keywords

  • anaerobic digestion
  • microbial community
  • microbiome
  • metagenomics
  • metabolomics
  • proteomics
  • biogas
  • biomethane
  • municipal solid waste
  • sewage sludge
  • methanogens

Published Papers (1 paper)

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Research

13 pages, 2867 KiB  
Article
The Potential of Digested Sludge-Assimilating Microflora for Biogas Production from Food Processing Wastes
by Sato Hasaka, Saki Sakamoto and Katsuhiko Fujii
Microorganisms 2023, 11(9), 2321; https://doi.org/10.3390/microorganisms11092321 - 15 Sep 2023
Cited by 1 | Viewed by 843
Abstract
Food processing wastes (FPWs) are residues generated in food manufacturing, and their composition varies depending on the type of food product being manufactured. Therefore, selecting and acclimatizing seed microflora during the initiation of biogas production is crucial for optimal outcomes. The present study [...] Read more.
Food processing wastes (FPWs) are residues generated in food manufacturing, and their composition varies depending on the type of food product being manufactured. Therefore, selecting and acclimatizing seed microflora during the initiation of biogas production is crucial for optimal outcomes. The present study examined the biogas production capabilities of digested sludge-assimilating and biogas-yielding soil (DABYS) and enteric (DABYE) microflorae when used as seed cultures for biogas production from FPWs. After subculturing and feeding these microbial seeds with various FPWs, we assessed their biogas-producing abilities. The subcultures produced biogas from many FPWs, except orange peel, suggesting that the heterogeneity of the bacterial members in the seed microflora facilitates quick adaptation to FPWs. Microflorae fed with animal-derived FPWs contained several methanogenic archaeal families and produced methane. In contrast, microflorae fed with vegetable-, fruit-, and crop-derived FPWs generated hydrogen, and methanogenic archaeal populations were diminished by repeated subculturing. The subcultured microflorae appear to hydrolyze carbohydrates and protein in FPWs using cellulase, pectinase, or protease. Despite needing enhancements in biogas yield for future industrial scale-up, the DABYS and DABYE microflorae demonstrate robust adaptability to various FPWs. Full article
(This article belongs to the Special Issue Anaerobic Digestion 2.0)
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