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Research Progress and Evaluation Challenges of By-Product and Waste Valorization

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

Deadline for manuscript submissions: 31 October 2024 | Viewed by 1337

Special Issue Editors


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Guest Editor
1. CBQF-Centro de Biotecnologia e Química Fina–Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
2. Amyris Bio Products Portugal, Unipessoal, Lda, Portugal
Interests: waste valorization; protein and peptides; bioinorganic chemistry; green chemistry; cheminformatics
CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Arquiteto Lobão Vital 172, 4200-374 Porto, Portugal
Interests: extraction of bioactive ingredients; phenolic compounds; nutraceuticals; antimicrobials; antifouling agents
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Escola Superior de Biotecnologia, CBQF-Centro de Biotecnologia e Química Fina–Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
Interests: biological valorization of wastes; fractionation of wastes and purification of components to produce platform chemicals and functional ingredients; economic viability of waste valorization processes
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Faculty of Biotechnology, CBQF–Centre of Biotechnology and Fine Chemistry–Associate Laboratory, Catholic University of Portugal, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
Interests: polymers from natural source; synthesis and characterization of hydrogels based on natural polysaccharides; nanostructured materials based on biopolymers; extraction, purification and valorization of polysaccharides and bioactive compounds from residues and byproducts
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The world is facing an ever-increasing pressure on its natural resources, aggravated by the increasing demand by consumers for new and more affordable bioactive products. On top of that, environmental awareness and concern by the public in general demands a shift in the strategies of production of new valuable products for high value markets, such as the cosmeceutical or nutraceutical. The valorization of by-products and waste products is an attractive and compelling strategy, giving rise to new products while complying with the ideas of the circular economy.

Considering these points, the following Special Issue aims to explore the field of by-product valorization processes for the development of sustainable products for high value markets, exploring the utilization of old and new by-products and waste streams from various industries to create value-added products for growing markets. Evaluation of explored strategies by means of green and sustainability metrics is highly encouraged, thus providing solid grounds on the sustainability claims of evaluated strategies.

Summarizing, the scope of this Special Issue will encompass the examination of different valorization processes, their potential applications, and their environmental impact assessment using green metrics. The topics of interest for this Special Issue include, but are not limited, to the following:

  • Latest advancements and novel approaches in by-product valorization within the context of high value markets, such as, but not limited to, nutraceutical or cosmeceutical product development.
  • Identification of new sources of bioactive compounds, extraction techniques, formulation strategies, and quality control methods.
  • Evaluation of the sustainability aspects of valorization processes, emphasizing the use of green metrics.
  • Evaluation of environmental, economic, and social impacts of valorization processes, such as energy and material consumption, carbon footprint, waste generation, and socioeconomic benefits.
  • Comprehensive overview of current trends, challenges, and opportunities in the field of valorization of by-products and wastes into added value products.

The Special Issue will thus contribute to the knowledge base by highlighting successful case studies, discussing technological advancements, and identifying future research directions grounded by objective and solid sustainability evaluation.

We therefore encourage all authors to contribute with original research articles, reviews, and case studies that investigate already established and innovative strategies and technologies for the efficient conversion of by-products into valuable ingredients or finished products, with particular emphasis on strategies’ evaluation by means of sustainability and green metrics.

Dr. Carlos Miguel Henriques Ferreira
Dr. Sara Silva
Dr. Catarina Silva S. Oliveira
Dr. Alessandra Braga Ribeiro
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 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. 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

  • by-product valorization
  • bioactive
  • circular economy
  • green chemistry
  • green metrics

Published Papers (2 papers)

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Research

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19 pages, 2614 KiB  
Article
Kinetic Modeling of Co-Pyrogasification in Municipal Solid Waste (MSW) Management: Towards Sustainable Resource Recovery and Energy Generation
by Anabel Fernandez, Daniela Zalazar-García, Carla Lorenzo-Doncel, Diego Mauricio Yepes Maya, Electo Eduardo Silva Lora, Rosa Rodriguez and Germán Mazza
Sustainability 2024, 16(10), 4056; https://0-doi-org.brum.beds.ac.uk/10.3390/su16104056 - 13 May 2024
Viewed by 656
Abstract
This study addresses the co-pyrogasification of municipal solid waste (MSW) from the Environmental Technology Park, San Juan, Argentina. This process involves heating waste at high temperatures in a low-oxygen or oxygen-free atmosphere as a sustainable strategy for waste management and energy generation. The [...] Read more.
This study addresses the co-pyrogasification of municipal solid waste (MSW) from the Environmental Technology Park, San Juan, Argentina. This process involves heating waste at high temperatures in a low-oxygen or oxygen-free atmosphere as a sustainable strategy for waste management and energy generation. The principal objective is to focus on understanding the MSW co-pyrogasification kinetics to enhance performance in reactor design. A representative sample of MSW collected over a month was analyzed, focusing on the variation in mass proportions of plastic, organic matter, and paper. The empirical methodology included the deconvolution of macro-TGA curves and deep learning algorithms to predict and validate macro-TG data during co-pyrogasification. The findings reveal that MSW is a solid matrix more easily treated on thermochemical platforms, with kinetic and thermodynamic parameters favoring its processing. This approach suggests that MSW co-pyrogasification may represent a feasible alternative for resource recovery and bioenergy production, supporting the policies for the transition to a cleaner future and a circular economy. Full article
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24 pages, 3041 KiB  
Review
Waste Management of Wind Turbine Blades: A Comprehensive Review on Available Recycling Technologies with A Focus on Overcoming Potential Environmental Hazards Caused by Microplastic Production
by Sara Taherinezhad Tayebi, Matteo Sambucci and Marco Valente
Sustainability 2024, 16(11), 4517; https://0-doi-org.brum.beds.ac.uk/10.3390/su16114517 - 26 May 2024
Viewed by 397
Abstract
The 2020 targets for sustainable development and circular economy encourage global leaders and countries to legislate laws and policies on several critical hot topics to prevent further global warming: (1) the increased utilization of renewable electrical power (wind turbine implants, as an example); [...] Read more.
The 2020 targets for sustainable development and circular economy encourage global leaders and countries to legislate laws and policies on several critical hot topics to prevent further global warming: (1) the increased utilization of renewable electrical power (wind turbine implants, as an example); (2) waste transformation into high-added-value materials based on the European Green Deal for energy transition; and (3) material and energy recovery and circularity. Accordingly, scholars and researchers have predicted that, hopefully, installed wind power capacity is going to increase dramatically by 2050. However, our ecosystem will have to face and deal with an enormous amount of decommissioned turbine blades. The disposal of these wastes via conventional methods could not only raise the possibility of microplastic formation, but could also boost the probability of environmental issues such as air pollution, soil, water contamination, etc. Moreover, these hazards will endanger wildlife and humans. As a result, the waste management of these retired blades composed of multi-lateral composite materials through a sustainable, effective, and feasible single/or hybrid process is necessary. This review aims to summarize all of the information about turbines, introduce all the various recycling pathways used for their blades, and provide a comparative analysis of these methods as well. In addition, the paper defines the possibility of microplastic formation from this waste (especially end-of-life turbine blade scraps), points out potential risks for the Earth, and suggests actions to inhibit their build-up and to keep the environment safe. Full article
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