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Progress in Biorefinery of Lignocellulosic Biomass to Bio-Energies and Bio-Based...
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Progress in Biorefinery of Lignocellulosic Biomass to Bio-Energies and Bio-Based Chemicals

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Chemical Processes and Systems".

Deadline for manuscript submissions: 31 March 2025 | Viewed by 9266

Special Issue Editor

Prof. Dr. Yu-Cai He

E-Mail Website
Guest Editor
School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, China
Interests: biocatalysis; bioenergy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

To date, the rapidly growing, worldwide environmental concerns and expeditiously dwindling fossil fuels have been attracting increasing attention. Lignocellulosic biomass is composed of three macromolecules, namely celluloses, hemicellulose, and lignin. It is the most common abundant raw material for the biorefinery of renewables to value-added biofuels, functional materials, and biobased chemicals worldwide.

Highly efficient utilization of lignocellulosic biomass has attracted explosive research interests in chemistry, biology, environment, and energy. The types of lignocelluosic biomass must be carefully selected because there are various sources that can interfere with the food chain, so it is necessary to identify non-edible sources to be valorized. Research into the highly efficient conversion of renewable lignocellulose into valuable products is crucial for reducing international dependency on conventional petroleum-based resources and increasing environmental and economic viability.

Lignocellulosic biorefinery processes with lignocellulosic biomass can be performed in multiple steps, such as pretreatment, saccharification, fermentation, chemocatalysis, biocatalysis, and further downstream processing, to attain numerous valuable products. This Special Issue highlights the progress in the biorefinery of lignocellulosic biomass to bioenergies and bio-based chemicals.

Prof. Dr. Yu-Cai He
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. Processes 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 2400 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

  • biomass pretreatment
  • biorefinery
  • biofuels
  • value-added chemicals
  • process optimization
  • process integration

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Published Papers (4 papers)

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Research

16 pages, 9842 KiB  
Article
An Early Study on the Synthesis of Lignin-Graft-(Net-Poly(acrylamide-co-N,N′methylenebisacrylamide)), Characterization of the Produced Copolymer, and Evaluation of Its Performance as Adsorbent for Lead Removal from Wastewater Purposes
by María Fernanda Munguía-Quintero, Miguel Ángel Vega-Hernández, Alberto Rosas-Aburto, Martín Guillermo Hernández-Luna, Simón López-Ramírez, José Fernando Barragán-Aroche and Eduardo Vivaldo-Lima
Processes 2023, 11(8), 2309; https://doi.org/10.3390/pr11082309 - 1 Aug 2023
Cited by 2 | Viewed by 1354
Abstract
A lignin-graft-(net-poly(acrylamide-co-N,N′methylenebisacrylamide)) copolymer was synthesized by conventional free-radical crosslinking copolymerization using conventional and microwave heating. Grafting of the polymer network onto lignin was confirmed by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy (NMR), scanning electron microscopy (SEM)/energy dispersive spectroscopy (EDS), thermogravimetric [...] Read more.
A lignin-graft-(net-poly(acrylamide-co-N,N′methylenebisacrylamide)) copolymer was synthesized by conventional free-radical crosslinking copolymerization using conventional and microwave heating. Grafting of the polymer network onto lignin was confirmed by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy (NMR), scanning electron microscopy (SEM)/energy dispersive spectroscopy (EDS), thermogravimetric analysis (TGA), and elemental analysis. The performance of the modified materials for the removal of lead from water was evaluated. The materials obtained by the two types of heating showed excellent removal efficiencies: sample HLigAM4h, 96%; and sample HLigAMMW5, 86%. The maximum adsorption capacity of HLigAM4h was 209.82 mg g−1. The obtained copolymer (sample HLigAM4h) was characterized by X-ray photoelectron spectroscopy (XPS) and SEM/EDS after its evaluation as an adsorbent, which confirm the adsorption of Pb2+. This is the first of a series of studies on the topic, of a preliminary nature, with several other ones coming up in due time. Full article
(This article belongs to the Special Issue Progress in Biorefinery of Lignocellulosic Biomass to Bio-Energies and Bio-Based Chemicals)
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11 pages, 1651 KiB  
Article
Production of Trehalose from Maltose by Whole Cells of Permeabilized Recombinant Corynebacterium glutamicum
by Zaiwei Man, Huihui Cui, Jin Li, Zhiqiang Cai and Jing Guo
Processes 2022, 10(12), 2501; https://doi.org/10.3390/pr10122501 - 24 Nov 2022
Cited by 1 | Viewed by 1502
Abstract
Trehalose (α-D-glucopyranosyl-1,1-α-D-glucopyranoside) is a stable and nonreducing disaccharide; can be used as sweetener, stabilizer, and humectant; and has many applications in the food, pharmaceutical, and cosmetic industries. Trehalose production from maltose catalyzed by trehalose synthase (TreS) is simple and economically feasible for industrial-scale [...] Read more.
Trehalose (α-D-glucopyranosyl-1,1-α-D-glucopyranoside) is a stable and nonreducing disaccharide; can be used as sweetener, stabilizer, and humectant; and has many applications in the food, pharmaceutical, and cosmetic industries. Trehalose production from maltose catalyzed by trehalose synthase (TreS) is simple and economically feasible for industrial-scale application. Reducing the cost and enhancing the efficiency of TreS synthesis and the conversion of maltose to trehalose is critical for trehalose production. In this study, the homologous TreS was constitutively overexpressed in Corynebacterium glutamicum ATCC13032 by removing the repressor gene lacIq fragment in the plasmid, and TreS expression could be exempt from the inducer addition and induction process. For cell permeabilization, Triton X-100 was used as a permeabilization agent, and the treatment time was 3 h. In the conversion system, the permeabilized cells of recombinant C. glutamicum were used as biocatalysts, 300 g/L maltose was used as a substrate, and 173.7 g/L trehalose was produced within 12 h under 30 °C and pH 7.0 conditions. In addition, the whole-cell biocatalysts showed promising reusability. This study provides a safe, convenient, practical, and low-cost pathway for the production of trehalose. Full article
(This article belongs to the Special Issue Progress in Biorefinery of Lignocellulosic Biomass to Bio-Energies and Bio-Based Chemicals)
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11 pages, 1243 KiB  
Article
Optimization of L-Citrulline Operon in Corynebacterium glutamicum for L-Citrulline Production
by Zaiwei Man, Jin Li, Huihui Cui, Zhiqiang Cai and Jing Guo
Processes 2022, 10(10), 2153; https://doi.org/10.3390/pr10102153 - 21 Oct 2022
Viewed by 2050
Abstract
L-citrulline plays important roles in many physiological processes, and its application range is expanding rapidly. Corynebacterium glutamicum strains have the potential to be efficient L-citrulline producers. In this study, we performed optimization of L-citrulline biosynthesis operon in C. glutamicum ATCC13032 for L-citrulline production. [...] Read more.
L-citrulline plays important roles in many physiological processes, and its application range is expanding rapidly. Corynebacterium glutamicum strains have the potential to be efficient L-citrulline producers. In this study, we performed optimization of L-citrulline biosynthesis operon in C. glutamicum ATCC13032 for L-citrulline production. Chromosomal integration of the integral argBEc gene from Escherichia coli (encoding natively insensitive N-acetylglutamate kinase), the deletion of the argR gene (encoding repressor ArgR), and the deletion of the argG gene (encoding argininosuccinate synthase) were achieved simultaneously by one-step genome modification and by obtaining the L-citrulline-producing strain. Then, plasmid-based overexpression of the optimized L-citrulline operon was carried out and the L-citrulline production was further improved. In fed-batch fermentation, the L-citrulline production and yield from glucose of the final strain reached 26.7 g/L and 0.18 g/g, respectively. These results indicate that optimization of L-citrulline operon in C. glutamicum is effective to construct the L-citrulline over-producing strain. Full article
(This article belongs to the Special Issue Progress in Biorefinery of Lignocellulosic Biomass to Bio-Energies and Bio-Based Chemicals)
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10 pages, 1731 KiB  
Article
Valorization of Waste Lignocellulose to Furfural by Sulfonated Biobased Heterogeneous Catalyst Using Ultrasonic-Treated Chestnut Shell Waste as Carrier
by Jianguang Liang, Jingjian Zha, Nana Zhao, Zhengyu Tang, Yucai He and Cuiluan Ma
Processes 2021, 9(12), 2269; https://doi.org/10.3390/pr9122269 - 17 Dec 2021
Cited by 11 | Viewed by 2633
Abstract
Recently, the highly efficient production of value-added biobased chemicals from available, inexpensive, and renewable biomass has gained more and more attention in a sustainable catalytic process. Furfural is a versatile biobased chemical, which has been widely used for making solvents, lubricants, inks, adhesives, [...] Read more.
Recently, the highly efficient production of value-added biobased chemicals from available, inexpensive, and renewable biomass has gained more and more attention in a sustainable catalytic process. Furfural is a versatile biobased chemical, which has been widely used for making solvents, lubricants, inks, adhesives, antacids, polymers, plastics, fuels, fragrances, flavors, fungicides, fertilizers, nematicides, agrochemicals, and pharmaceuticals. In this work, ultrasonic-treated chestnut shell waste (UTS-CSW) was utilized as biobased support to prepare biomass-based heterogeneous catalyst (CSUTS-CSW) for transforming waste lignocellulosic materials into furfural. The pore and surface properties of CSUTS-CSW were characterized with BET, SEM, XRD, and FT-IR. In toluene–water (2:1, v:v; pH 1.0), CSUTS-CSW (3.6 wt%) converted corncob into furfural yield in the yield of 68.7% at 180 °C in 15 min. CSUTS-CSW had high activity and thermostability, which could be recycled and reused for seven batches. From first to seventh, the yields were obtained from 68.7 to 47.5%. Clearly, this biobased solid acid CSUTS-CSW could be used for the sustainable conversion of waste biomasses into furfural, which had potential application in future. Full article
(This article belongs to the Special Issue Progress in Biorefinery of Lignocellulosic Biomass to Bio-Energies and Bio-Based Chemicals)
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