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Fermentation
Special Issues
Microbial Degradation and Conversion of Refractory Organics
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Microbial Degradation and Conversion of Refractory Organics

A special issue of Fermentation (ISSN 2311-5637). This special issue belongs to the section "Microbial Metabolism, Physiology & Genetics".

Deadline for manuscript submissions: 30 June 2024 | Viewed by 2741

Special Issue Editors

Prof. Dr. Shangxian Xie

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Guest Editor
College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
Interests: synthetic biology; environmental microbiology; biomass degradation and conversion; lignin valorization
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hongbo Yu

E-Mail Website
Guest Editor
College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
Interests: environmental microbiology; wood decay; lignin; biorefinery; enzyme engineering; carbon materials
Prof. Dr. Fuying Ma

E-Mail Website
Guest Editor
College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
Interests: fungal biology; synthetic biology; lipid; biorefinery; gut microbiome
Prof. Dr. Xiaoyu Zhang

E-Mail Website
Guest Editor
College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
Interests: environmental microbiology; white rot fungi; biomass degradation and conversion; biofuel; bioremediation; bioactive substances

Special Issue Information

Dear Colleagues,

The never-ending anthropogenic activities in the environment lead to the accumulation of various industrial and synthetic toxic pollutants that have disturbed the natural ecosystem in many different ways. The majority of those refractory compounds include agro-industrial wastes like pesticides, antibiotics, petroleum effluents, natural and synthetic polymers like lignin, PLA (polylactic acid), PAH (polycyclic aromatic hydrocarbons) as well as water and food wastes. Microorganisms, in this case, are playing dynamic roles in their bioremediation, biodegradation and bioconversion, while synthesizing high-valued compounds at the same time. For developing a sustainable and green environment, it is tremendously essential to adapt and implement certain novel ways and strategies used by microorganisms to deal with all these refractory organics. The current Special Issue, therefore, focuses and welcome highly valuable research of interest on the following topics, but is not limited to:    

  • Microbial lignin valorization through depolymerization to aromatics conversion
  • Biodegradation and bioconversion of plastics and composition of biodegradable plastics (PLA, PHA, etc.) for sustainable environment
  • Application of microbial enzymes in degradation and conversion of refractory organics
  • Bioremediation of soil and water contaminated by PAH (polycyclic aromatic hydrocarbon), petroleum, pesticides, antibiotics, flame retardants, etc.
  • Bioconversion of urban organic wastes, industrial food wastes, and agricultural wastes into value-added products.
  • Tech-economic and modeling analysis of soil and water bioremediation
  • Novel biological technologies and processes for biomass valorization
  • Biodegradation and bioconversion of emerging organic pollutants

Prof. Dr. Shangxian Xie
Prof. Dr. Hongbo Yu
Prof. Dr. Fuying Ma
Prof. Dr. Xiaoyu Zhang
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 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

  • microbial degradation
  • bioconversion
  • environmental microbiology
  • refractory organics
  • lignin valorization
  • bioremediation
  • lignocellulose
  • plastics
  • polycyclic aromatic hydrocarbon

Published Papers (2 papers)

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Research

14 pages, 6757 KiB  
Article
Mimicking the Fungal Decay Strategy for Promoting the Bacterial Production of Polyhydroxyalkanoate from Kraft Lignin
by Xiao Fu, Qing Gong, Xuan Liu, Ze Zheng, Xiaoyu Zhang, Fuying Ma, Hongbo Yu and Shangxian Xie
Fermentation 2023, 9(7), 649; https://doi.org/10.3390/fermentation9070649 - 10 Jul 2023
Viewed by 1009
Abstract
Producing polyhydroxyalkanoate (PHA) from lignin through biological conversion has great further potential, but is held by its high heterogeneous characteristic toxicity of the depolymerized products, and low bioconversion of the depolymerized products. In this study, a Fenton-like reaction, which is inspired by fungal [...] Read more.
Producing polyhydroxyalkanoate (PHA) from lignin through biological conversion has great further potential, but is held by its high heterogeneous characteristic toxicity of the depolymerized products, and low bioconversion of the depolymerized products. In this study, a Fenton-like reaction, which is inspired by fungal decay strategy, was reported to cleave Kraft lignin linkages and produce low toxic mono-aromatic and low molecular organic compounds for microbial conversion. The treatment improved the bioconversion of lignin to PHA by 141.7% compared to Kraft lignin. The bond cleavage of Kraft lignin was characterized by Py-GC/MS and 2D NMR. Seven major depolymerized products were chosen to test their toxicity effect on bacterial fermentation. Furthermore, 920.4 mg of PHA was obtained from 1-L black liquor after Fenton-like reaction treatment. This is a novel attempt mimicking fungal decay strategy coupled with the microbial conversion of lignin into high-value PHA with a sustainable future. Full article
(This article belongs to the Special Issue Microbial Degradation and Conversion of Refractory Organics)
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12 pages, 2477 KiB  
Article
Lytic Polysaccharide Monooxygenases from Serpula lacrymans as Enzyme Cocktail Additive for Efficient Lignocellulose Degradation
by Fei Li, Yang Liu, Honglu Zhao, Xuan Liu and Hongbo Yu
Fermentation 2023, 9(6), 506; https://doi.org/10.3390/fermentation9060506 - 24 May 2023
Cited by 1 | Viewed by 1224
Abstract
Lytic polysaccharide monooxygenase (LPMO) could oxidize and cleavage the glycosidic bonds of polysaccharides in lignocellulose, thereby promoting the hydrolysis of polysaccharide substrates by glycoside hydrolases and significantly improving the saccharification efficiency of lignocellulose. Brown-rot fungi are typical degraders of lignocellulose and contain multiple [...] Read more.
Lytic polysaccharide monooxygenase (LPMO) could oxidize and cleavage the glycosidic bonds of polysaccharides in lignocellulose, thereby promoting the hydrolysis of polysaccharide substrates by glycoside hydrolases and significantly improving the saccharification efficiency of lignocellulose. Brown-rot fungi are typical degraders of lignocellulose and contain multiple LPMO genes of the AA14 family and AA9 family, however, the AA14 LPMO from brown-rot fungi was rarely reported. Herein, the transcriptomic analysis of Serpula lacrymans incubated in the presence of pine exhibited that an AA14 LPMO (SlLPMO14A) was significantly upregulated and there were redox interactions between LPMOs and other enzymes (AA3, AA6, and hemicellulose degrading enzyme), indicating that SlLPMO14A may be involved in the degradation of polysaccharides. Enzymatic profiling of SlLPMO14A showed the optimal pH of 8.0 and temperature of 50 °C and it had higher reaction activity in the presence of 40% glycerol and acetonitrile. SlLPMO14A could significantly improve the saccharification of pine and xylan-coated cellulose substrate to release glucose and xylose by cellulase and xylanase by disturbing the surface structure of lignocellulose based on environmental scanning electron microscope and atomic force microscopy analysis. Full article
(This article belongs to the Special Issue Microbial Degradation and Conversion of Refractory Organics)
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