Advanced Biofuel Production Processes and Technologies

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

Deadline for manuscript submissions: 31 October 2025 | Viewed by 585

Special Issue Editor


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Guest Editor
Palaeobiology, Department of Earth Sciences, Uppsala University Geocentrum, Villavägen 16, 752 36 Uppsala, Sweden
Interests: biomass production and processing; biofuels; bioenhanced biofuel production; microbial processes for biofuel production

Special Issue Information

Dear Colleagues,

Advanced biofuel preparation technologies employ modern and cutting-edge methods to transform biomass into resource-efficient, sustainable green fuels, offering a promising fossil fuel replacement or complement. Over time, biofuels have evolved from first-generation to fourth-generation technologies, with next-generation biofuels emerging as a cornerstone for a sustainable future. These advancements have enabled the utilization of diverse feedstocks, including agricultural residues, algae, and organic waste, contributing to a circular economy.

Innovative methods such as thermochemical processes, catalytic conversion, and enzymatic hydrolysis have significantly enhanced fuel yield, efficiency, and cost-effectiveness. These technologies are continuously evolving to improve process efficiency and resource utilization. Automation and advanced processing technologies are pivotal in streamlining biofuel production, enhancing scalability, and ensuring environmental sustainability. These innovations align with global goals to reduce greenhouse gas emissions, mitigate climate change, and transition toward renewable energy systems. With ongoing research and development, biofuel technologies are poised to play a vital role in creating a cleaner, greener, and more sustainable energy future. This Special Issue entitled “Advanced Biofuel Production Processes and Technologies” seeks high-quality works focusing on modern and innovative methods of biofuel production and processing.

Topics include, but are not limited to, the following:

  • Advanced technologies for the characterization of biomass for biofuels;
  • Innovative physicochemical methods for biofuel production;
  • Processing and upgradation technologies for biofuels;
  • Enzymatic or bioenhanced biofuel production;
  • Mathematical modelling for efficient biofuel production;
  • Life cycle analysis of biofuel production processes;
  • Integration of biofuel in sustainable and circular economy;
  • Biofuels for the mitigation of climate change;
  • Novel/next-generation biomass for advanced biofuels.

Dr. Abhijeet Singh
Guest Editor

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Keywords

  • next-generation biofuels
  • sustainable biofuels
  • advanced processing technologies
  • life cycle analysis
  • mathematical modelling
  • biomass characterization
  • climate change mitigation

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Published Papers (1 paper)

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Research

14 pages, 1154 KiB  
Article
Enhancing Biomethane Yield from Microalgal Biomass via Enzymatic Hydrolysis: Optimization and Predictive Modeling Using RSM Approach
by Souhaila Hangri, Kerroum Derbal, Abderrezzaq Benalia, Grazia Policastro, Antonio Panico and Antonio Pizzi
Processes 2025, 13(7), 2086; https://doi.org/10.3390/pr13072086 - 1 Jul 2025
Viewed by 234
Abstract
This study investigates the optimization of enzymatic hydrolysis for enhancing carbohydrate release from microalgal biomass and its subsequent impact on methane production during anaerobic digestion. Using Response Surface Methodology with a Box–Behnken design comprising 15 experimental runs, the effects of enzyme loading (20–40 [...] Read more.
This study investigates the optimization of enzymatic hydrolysis for enhancing carbohydrate release from microalgal biomass and its subsequent impact on methane production during anaerobic digestion. Using Response Surface Methodology with a Box–Behnken design comprising 15 experimental runs, the effects of enzyme loading (20–40 mg/gVS), pH (4.5–5.5), and incubation time (24–72 h) were evaluated. A quadratic regression model was developed to predict carbohydrate release, revealing significant interactions between these factors. The optimal conditions for enzymatic hydrolysis were determined to be a cellulase dose of 20 mg/gVS, pH 5.0, and an incubation period of 72 h. The model demonstrated excellent predictive accuracy, with an R2 value of 0.9894 and an adjusted R2 of 0.9704. Enzymatic hydrolysis significantly improved methane and biogas yields, with cumulative production reaching 52.50 mL/gVS and 95.62 mL/gVS, respectively, compared to 6.98 mL/gVS and 20.94 mL/gVS for untreated samples. The findings highlight the importance of optimizing enzyme loading and reaction time, while pH variations within the studied range had minimal impact. This study underscores the potential of enzymatic hydrolysis to enhance the bioavailability of organic matter, thereby improving the efficiency of anaerobic digestion for biogas production. Full article
(This article belongs to the Special Issue Advanced Biofuel Production Processes and Technologies)
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