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Anaerobic Digestion Process from the Viewpoint of Chemical, Biochemical and Microbiological Aspects

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Microbiology".

Deadline for manuscript submissions: closed (29 June 2024) | Viewed by 2316

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Faculty of Environmental Engineering and Mechanical Engineering, Poznań University of Life Sciences, 60-624 Poznan, Poland
Interests: chemistry; waste management; anaerobic digestion; methane production; water treatment; carriers and adsorbents; NGS
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Special Issue Information

Dear Colleagues, 

Anaerobic digestion (AD) is the well-known process of using biomass to produce biogas as an alternative energy source. Despite the many advantages of AD, this process is burdened with complexity, including a high risk of operational instability and sensitivity to changes in environmental conditions. The complexity of the process includes both chemical, biochemical, and microbiological aspects. The pH value is one of the most important chemical parameters determining the course of decomposition of organic matter, since it affects both the chemical reactions and the activity of the bacterial flora. The acetogenic bacteria and methanogenic Archea have strict requirements, are harder to adapt to change, and have a slower growth rate. In terms of the chemistry aspect of the process, the compounds that inhibit the process, those released during the process, as well as those that are part of the biomass, remain problematic. Biochemical and microbiological aspects include the genetic and morphological properties of anaerobic microorganisms and the relevant metabolic pathways. Syntrophic interactions between acetogens and methanogens as well as microbial aggregations deserve special attention. The efficiency of the AD process is highly dependent on microbial community dynamics which are affected by biochemical, environmental, and operational conditions. Metagenomic analyses, used in the study of AD microbiomes, provide insight into the microbial community composition, dynamics of development, and activity or functionality of microbes. Research is mainly conducted to optimize AD but also to achieve specific engineering goals.

Prof. Dr. Agnieszka Pilarska
Guest Editor

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Keywords

  • anaerobic digestion
  • biogas/methane
  • VFAs composition
  • inhibitors
  • biochemical pathways
  • enzymatic activity
  • biocatalysts
  • microbial community
  • syntrophic interactions
  • microbial carrier

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Published Papers (1 paper)

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Review

15 pages, 1079 KiB  
Review
The Use of Fungi of the Trichoderma Genus in Anaerobic Digestion: A Review
by Adrianna Kubiak, Agnieszka A. Pilarska, Agnieszka Wolna-Maruwka, Alicja Niewiadomska and Katarzyna Panasiewicz
Int. J. Mol. Sci. 2023, 24(24), 17576; https://doi.org/10.3390/ijms242417576 - 17 Dec 2023
Cited by 2 | Viewed by 1808
Abstract
Plant waste biomass is the most abundant renewable energy resource on Earth. The main problem with utilising this biomass in anaerobic digestion is the long and costly stage of degrading its complex structure into simple compounds. One of the promising solutions to this [...] Read more.
Plant waste biomass is the most abundant renewable energy resource on Earth. The main problem with utilising this biomass in anaerobic digestion is the long and costly stage of degrading its complex structure into simple compounds. One of the promising solutions to this problem is the application of fungi of the Trichoderma genus, which show a high capacity to produce hydrolytic enzymes capable of degrading lignocellulosic biomass before anaerobic digestion. This article discusses the structure of plant waste biomass and the problems resulting from its structure in the digestion process. It presents the methods of pre-treatment of lignocellulose with a particular focus on biological solutions. Based on the latest research findings, key parameters related to the application of Trichoderma sp. as a pre-treatment method are discussed. In addition, the possibility of using the digestate from agricultural biogas plants as a carrier for the multiplication of the Trichoderma sp. fungi, which are widely used in many industries, is discussed. Full article
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