Process-Based Valorization of Agro-Industrial Residues for Sustainable and Circular Systems

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

Deadline for manuscript submissions: 20 September 2026 | Viewed by 1260

Editors


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Guest Editor
Facultad de Ciencias Agrotecnológicas, Universidad Autónoma de Chihuahua, Chihuahua 31000, Mexico
Interests: use and management of agricultural soils; organic horticulture; production of organic fertilizers; use and management of naturals waste; plant nutrition; soils microbiology

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Guest Editor
Centro de Investigacion en Alimentacion y Desarrollo, Sonora, Mexico
Interests: bioprocesses; solid-state culture; submerged culture; bioactive compounds; enzymes; extraction and characterization; plants and agro-industrial waste; functional foods
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Special Issue Information

Dear Colleagues,

Sustainability constitutes a fundamental pillar of development in the agricultural and forestry sectors. In these fields, the increasing generation of by-products derived from agricultural, livestock, forestry, and agro-industrial activities represents a significant environmental challenge, as improper management leads to negative impacts on soil, water, and the atmosphere, in addition to increasing greenhouse gas emissions. In this context, process engineering and the design of physical–chemical, biological, thermochemical, and biotechnological transformation technologies, together with process optimization and integration within biorefineries, offer viable alternatives for residue valorization in a circular economy framework. Furthermore, the incorporation of mathematical modeling, catalysis, separation operations, and control and automation, complemented by technical–economic performance assessment, enables the transformation of environmental problems into a high-value resources, promoting sustainable and economically feasible solutions.

This Special Issue, ‘Process-Based Valorization of Agro-Industrial Residues for Sustainable and Circular Systems’, seeks high-quality contributions focused on (but not limited to) recent advances in the following topics:

  • Sustainability and development: agricultural residues as strategic resources
  • Residue transformation and stabilization processes
  • Bioprocesses and applied biotechnology
  • Process evaluation and optimization (Life Cycle Assessment, efficiency, and energy)
  • Scale-up, integration, and technology transfer
  • Modeling, optimization, integration, and techno-economic/environmental assessment of residue valorization processes.

Dr. Ofelia Adriana Hernández-Rodríguez
Dr. Jose Juan Buenrostro Figueroa
Guest Editors

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Keywords

  • agricultural residue valorization
  • agroproductive sustainability
  • climate change mitigation
  • process engineering
  • circular economy
  • process modeling and optimization
  • techno-economic and environmental assessment
  • process integration
  • biorefinery systems and separation processes

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Published Papers (1 paper)

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Research

18 pages, 2140 KB  
Article
Development and Valorization of Bioenergy Briquettes Using Agro-Industrial Residues from a Semi-Arid Region
by Víctor Daniel Núñez-Retana, Mirna Lugo-Rodríguez, Alondra Reyes-Morales, Artemio Carrillo-Parra, Heriberto de Jesus Maldonado-Quiñones, Maginot Ngangyo-Heya and Juan García-Quezada
Processes 2026, 14(7), 1138; https://doi.org/10.3390/pr14071138 - 1 Apr 2026
Viewed by 727
Abstract
The valorization of agro-industrial residues for solid biofuel production represents a sustainable strategy to meet energy demand, reduce open-field burning, and mitigate environmental impacts. This study aimed to assess the feasibility of producing high-quality briquettes from agro-industrial residues such as oregano stems, pecan [...] Read more.
The valorization of agro-industrial residues for solid biofuel production represents a sustainable strategy to meet energy demand, reduce open-field burning, and mitigate environmental impacts. This study aimed to assess the feasibility of producing high-quality briquettes from agro-industrial residues such as oregano stems, pecan shells, and peanut shells sourced from a semi-arid region of northern Mexico. Raw materials were obtained from local industries, processed, and characterized through proximate analysis and determination of higher heating value (HHV). Briquettes were manufactured under various compaction pressures and temperatures without the use of binders, and their physical and energy properties were evaluated according to international standards. Results indicated that all briquette types met Class A quality standards, with moisture contents between 6 and 9%, ash contents below 6%, and HHVs ranging from 18.9 to 21.0 MJ kg−1. Pecan shell briquettes exhibited the highest particle density (1.18 g cm−3), while peanut shell briquettes demonstrated superior mechanical performance and the highest Impact Resistance Index (97% and 200, respectively). Oregano stem briquettes showed lower densities but maintained satisfactory energy properties (19.5 MJ kg−1). Beyond its energy potential, this valorization approach contributes to local economic development, reduces environmental pollution, and decreases dependence on firewood in rural communities. Full article
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