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Biomass Resources to Bioenergy: 2nd Edition

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A4: Bio-Energy".

Deadline for manuscript submissions: closed (20 May 2026) | Viewed by 2537

Special Issue Editor


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Guest Editor
Department of Manufacturing and Civil Engineering, Norwegian University of Science and Technology, 7034 Trondheim, Norway
Interests: renewable energy; biomass; anaerobic digestion; waste treatment; environment; solid waste management; biomass conversion; sustainability; energy engineering; energy conversion
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Special Issue Information

Dear Colleagues,

Bioresources are renewable and vast, and among all the renewable resources, it is the only candidate that can be transformed into liquid fuel, mandating its suitability to replace liquid fossil fuel-based applications, such as for transportation. Converting biomass resources to bioenergy typically involves processes such as anaerobic digestion, fermentation, combustion, gasification, and pyrolysis, which make use of a range of biomass sources spanning from energy crops and waste biomass resources to algae-based biomass. These processes operate under a variety of processing conditions—employing either heat, pressure, micro-organisms, combinations of those, or other miscellaneous conditions. However, bioresources are still underexploited, and plants or living organisms, which may have enormous potential as sustainable energy carriers and for use in biofuel production, are likely to remain undiscovered. Within this context, dedicated research on mapping biomass resources, which are relatively untapped and underutilized or yet to be utilized or genetically modified, is critical for understanding their potential toward maximizing energy conversion and developing a sustainable future and bioeconomy framework.

This Special Issue, titled “Biomass resources to Bioenergy”, focuses on this aspect and solicits short and full-length research and review papers with potential topics that include, but are not limited to, the following:

  • Sustainable biomass production, including all value chains involved;
  • Genetically modified biomass resources towards bioenergy generation;
  • Bioenergy, biofuels, and biochemicals production from all conversion routes (i.e., biochemical, thermo-chemical, and mechanical processes) utilizing all kinds of biomass resources (i.e., terrestrial and algae biomass, bioresidues, and biowastes);
  • Novel technological advancements in biomass resource-based processes like biochemical looping combustion, torrefaction, biomass co-combustion (i.e., biomass with coal, shale oil, and other fossil-based fuels), and photo- and dark fermentation;
  • Technoeconomic, environmental, and safety analysis of bioenergy and biorefinery processes employing commercial and open-source software (i.e., Aspen HYSIS, MATLAB, SuperPro, HOMER, RETScreen modeling, LCA tools, and similar software) including various other mathematical modeling approaches;
  • Machine learning, artificial intelligence (AI), and emerging approaches to predict performance and optimization of bioenergy and biorefining processes.

Dr. Shiplu Sarker
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 250 words) can be sent to the Editorial Office for assessment.

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. Energies is an international peer-reviewed open access semimonthly 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

  • genetically modified biomass
  • bioeconomy
  • biofuels
  • bioconversion processes
  • novel bioresource technologies
  • computational analysis of bioenergy processes
  • LCA analysis of bioenergy processes
  • machine learning and AI approaches on bioenergy processes
  • bioenergy systems

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Published Papers (2 papers)

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Research

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17 pages, 1333 KB  
Article
Anaerobic Digestion of the Halophyte Salicornia ramosissima in Co-Digestion with Swine Manure in Lab-Scale Batch and Continuous Reactor Tests
by Aadila Cayenne and Hinrich Uellendahl
Energies 2025, 18(12), 3085; https://doi.org/10.3390/en18123085 - 11 Jun 2025
Cited by 1 | Viewed by 1053
Abstract
This laboratory study investigated the anaerobic co-digestion process of the halophyte S. ramosissima (Sram) together with swine manure (SM) in different mixing ratios in batch and continuous reactor experiments. In the batch experiments, a methane yield of 214 mLCH4·gVS−1 was [...] Read more.
This laboratory study investigated the anaerobic co-digestion process of the halophyte S. ramosissima (Sram) together with swine manure (SM) in different mixing ratios in batch and continuous reactor experiments. In the batch experiments, a methane yield of 214 mLCH4·gVS−1 was obtained for Sram in mono-digestion. In co-digestion with SM, the methane yields were slightly higher than calculated from the yields of each substrate in mono-digestion. Also, the kinetic rate constant in the co-digestion with swine manure increased from 0.219 d−1 for mono-digested S. ramosissima to 0.318 d−1 in the co-digestion of 50:50 Sram:SM (based on VS). Two continuous 5 L lab-scale CSTR reactors were operated: one as a control (100% SM) and the other as a co-digestion reactor with an increasing VS share of Sram (15, 25, and 35%) in the feed. Both reactors were operated at an organic loading rate (OLR) of 2.5 gVS.L−1·d−1 and a hydraulic retention time (HRT) of 20 days. In the continuous process, the highest methane yield of 276 mLCH4·gVS−1 was achieved at a co-digestion VS ratio of Sram:SM 25:75, corresponding to a methane yield from the added S. ramosissima of 277 mLCH4·gVS−1. This showed successful operation of the continuous co-digestion process of S. ramosissima and swine manure, with higher methane yields of S. ramosissima than in the mono-digestion batch tests. Full article
(This article belongs to the Special Issue Biomass Resources to Bioenergy: 2nd Edition)
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Review

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30 pages, 1055 KB  
Review
Anaerobic Digestion of Flower Waste: A Review on Biomethane Potential, Process Optimization, and Sustainability Perspectives
by Mariana Rodriguez Popich, Miguel Nogueira and Rita Fragoso
Energies 2026, 19(2), 289; https://doi.org/10.3390/en19020289 - 6 Jan 2026
Cited by 2 | Viewed by 1065
Abstract
The global floriculture industry generates massive organic residues that pose environmental risks but offer untapped bioenergy potential. This review evaluates the feasibility of valorizing flower waste through anaerobic digestion (AD) by synthesizing experimental data on substrate characterization, pretreatment efficacy, and reactor performance. Results [...] Read more.
The global floriculture industry generates massive organic residues that pose environmental risks but offer untapped bioenergy potential. This review evaluates the feasibility of valorizing flower waste through anaerobic digestion (AD) by synthesizing experimental data on substrate characterization, pretreatment efficacy, and reactor performance. Results indicate that biochemical methane potentials (BMP) vary significantly, ranging from 89 to 412 mLCH4·g−1VS, depending on plant species and tissue composition. Major bottlenecks include high lignocellulosic recalcitrance (lignin content up to 0.28 g·g−1TS) and the presence of inhibitory phenolic compounds. Analysis reveals that while alkaline pretreatments effectively disrupt lignocellulosic structures, co-digestion strategies are essential to mitigate inhibition and balance nutrient ratios. However, current research is predominantly limited to laboratory-scale batch assays, leaving a critical knowledge gap regarding long-term process stability and inhibition dynamics in continuous systems. To transform this laboratory concept into a scalable technology, future efforts must focus on pilot-scale continuous reactor trials, standardized testing protocols, and comprehensive techno-economic and life cycle assessments. Full article
(This article belongs to the Special Issue Biomass Resources to Bioenergy: 2nd Edition)
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