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Sustainable Food Systems and the Reuse of Food Waste

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Sustainable Food".

Deadline for manuscript submissions: 30 June 2026 | Viewed by 1667

Special Issue Editors


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Guest Editor
Department of Chemical and Environmental Engineering, University of Oviedo, Oviedo, Spain
Interests: food waste; functional foods; bioactive compounds; green extraction; antioxidants; fermentation

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Guest Editor
Department of Chemical Engineering, Faculty of Science, University of Vigo, Ourense, Spain
Interests: green chemistry; food science; pharmacology; organic chemistry; biotechnology; waste management
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue addresses the pressing challenge of agri-food waste management in a circular food economy. Large volumes of side streams remain landfilled or underused, driving greenhouse gas emissions, nutrient losses, and avoidable costs. We seek contributions that convert these liabilities into assets through resource-efficient valorization: green extraction of high-value compounds (polyphenols, dietary fibres, proteins/peptides, lipids, pigments); microbial and enzymatic conversions to biochemicals, biopolymers, biofertilizers, and bioenergy; and integrated biorefinery strategies that cascade products and close loops. We also welcome work on fermentation of side streams with probiotic or starter cultures; synbiotic designs coupling probiotic strains with prebiotics recovered from wastes (e.g., pectins, arabinoxylans, resistant starch); process solutions to preserve viability (encapsulation, gentle drying) and tailor functionality (postbiotics, metabolites); and evaluations of safety, stability, and efficacy.

Key topics include feedstock characterization and pretreatment, process and reactor design, low-impact separation and purification, quality of recovered ingredients, and integration with food and feed supply chains, alongside techno-economic and life-cycle assessments.

By incorporating advances from laboratory to industrial practices, this Special Issue aims to catalyze interdisciplinary dialogue and actionable solutions that reduce waste burdens, recover critical resources, and build resilient, sustainable food systems

Dr. Marta Sánchez
Dr. Pedro Ferreira-Santos
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 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. Sustainability 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 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

  • food waste
  • resource recovery
  • physicochemical pretreatment
  • fermentation
  • green extraction
  • bioactive compounds
  • biomaterials

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Published Papers (1 paper)

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Review

29 pages, 2000 KB  
Review
Biochar Derived from Agricultural Residues for Wastewater Contaminant Removal
by Pengyun Liu, Luisa Boffa and Giancarlo Cravotto
Sustainability 2026, 18(1), 435; https://doi.org/10.3390/su18010435 - 1 Jan 2026
Cited by 5 | Viewed by 1307
Abstract
The valorization of agricultural residues helps improve crop economic efficiency and alleviate environmental pressures. Owing to the merits of simplicity, high efficiency, low costs, and scalability, adsorption removal of contaminants using biochar has been widely investigated. The adsorption removal of organic and inorganic [...] Read more.
The valorization of agricultural residues helps improve crop economic efficiency and alleviate environmental pressures. Owing to the merits of simplicity, high efficiency, low costs, and scalability, adsorption removal of contaminants using biochar has been widely investigated. The adsorption removal of organic and inorganic contaminants from wastewater using biochar derived from agricultural residue follows the principles of the circular economy and green chemistry, facilitating both environmental remediation and agricultural development. Due to the distinctive precursors—agricultural residues—biochar exhibits unique physicochemical properties, enabling it to interact differently with contaminants in real wastewater. Herein, this review addresses the knowledge gap in wastewater remediation using agricultural residue-based biochar. It compiles the principles of adsorption with agricultural waste-derived biochar, including general concepts, interactions between biochar and wastewater contaminants, and selective adsorption. The preparation, activation, modification, functionalization, and regeneration of such biochar, as well as their application to wastewater remediation, are comprehensively outlined. Furthermore, the economic evaluation and environmental impacts, as well as the future directions and challenges in this field, have also been presented. Full article
(This article belongs to the Special Issue Sustainable Food Systems and the Reuse of Food Waste)
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