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Applied Sciences
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Waste Recycling Materials and Technologies: Latest Advances and Prospects
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Waste Recycling Materials and Technologies: Latest Advances and Prospects

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Environmental Sciences".

Deadline for manuscript submissions: 20 February 2025 | Viewed by 1769

Special Issue Editors

Prof. Dr. Miguel Suffo

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Guest Editor
Department of Mechanical Engineering and Industrial Design, High Engineering School, Universidad de Cádiz, 11510 Puerto Real, Spain
Interests: composites, biocomposites and agrocomposites manufacturing; information technology in manufacturing; ecodesign and green manufacturing; circular bioeconomy
Prof. Dr. Francisco Jesús Fernández Morales

E-Mail Website
Guest Editor
Institute of Chemical and Environmental Technologies (ITQUIMA), Department of Chemical Engineering, University Castilla-La Mancha, 13071 Ciudad Real, Spain
Interests: anaerobic digestion; biogas; anaerobic fermentation; biohydrogen; microbial fuel cell; bioelectro systems; bioelectrochemistry; energetic valorisation of wastes
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jose Luis García-Morales

E-Mail Website
Guest Editor
Department of Environmental Technologies, Faculty of Sea and Environmental Sciences, University of Cádiz, 11510 Puerto Real, Spain
Interests: anaerobic digestion; biogas; anaerobic fermentation; composting; biohydrogen; valorisation of wastes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue, "Waste Recycling Materials and Technologies: Latest Advances and Prospects", is dedicated to exploring the latest developments in material recycling and associated technologies. It covers a broad spectrum of topics, including innovations in waste processing, the conversion of waste into useful resources, and strategies for environmental sustainability. This collection contributes to the field with research articles, comprehensive reviews, and case studies that highlight best practices and technological advances. This publication is an essential platform for academics, engineers, and industry professionals interested in the most advanced and promising solutions for waste management and circular economy. It also provides insights into future challenges and opportunities in the field of recycling and material reuse.

Prof. Dr. Miguel Suffo
Prof. Dr. Francisco Jesús Fernández Morales
Prof. Dr. Jose Luis García-Morales
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. Applied Sciences 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

  • waste recycling
  • recycling technologies
  • environmental sustainability
  • circular bioeconomy and economy
  • material processing
  • eco-friendly solutions
  • waste conversion
  • textile waste management

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Published Papers (2 papers)

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Research

17 pages, 2828 KiB  
Article
Catalytic Hydrothermal Treatment for the Recycling of Composite Materials from the Aeronautics Industry
by José M. Vázquez-Fernández, José M. Abelleira-Pereira, Belén García-Jarana, Lucio Cardozo-Filho, Jezabel Sánchez-Oneto and Juan R. Portela-Miguélez
Appl. Sci. 2024, 14(21), 9874; https://doi.org/10.3390/app14219874 - 29 Oct 2024
Viewed by 537
Abstract
Epoxy resin composite matrices reinforced with carbon fibers are highly demanded by certain industries such as the aeronautics industry because of their exceptional mechanical properties. Unfortunately, the use of reinforcing carbon fibers makes these composite materials hard to recycle by conventional methods. Therefore, [...] Read more.
Epoxy resin composite matrices reinforced with carbon fibers are highly demanded by certain industries such as the aeronautics industry because of their exceptional mechanical properties. Unfortunately, the use of reinforcing carbon fibers makes these composite materials hard to recycle by conventional methods. Therefore, in this study, specific hydrothermal treatments have been employed to recover carbon fibers from the offcuts of composite parts from the aeronautics industry. The resin decomposition rates (DRs) achieved by different settings of the operating parameters, such as the use of alkaline catalysts (KOH, NaOH, or K2CO3), the application of mechanical stirring, the use of different reaction times, the solvent volume/composite mass ratio, the specific surface area (surface area/mass) of the composite pieces, and the operating temperature and pressure (subcritical or supercritical conditions), have been examined and assessed. Under the conditions that have been evaluated, resin decomposition rates nearly as high as 98% have been achieved, while the recycled fibers retained over 95% of their original tensile strength (TS). Full article
(This article belongs to the Special Issue Waste Recycling Materials and Technologies: Latest Advances and Prospects)
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17 pages, 2001 KiB  
Article
Impact of Nanoparticle Addition and Ozone Pre-Treatment on Mesophilic Methanogenesis in Temperature-Phased Anaerobic Digestion
by Encarnación Díaz Domínguez, María Eugenia Ibañez López, Jacek Mąkinia, Francisco Jesús Fernández-Morales and José Luis García Morales
Appl. Sci. 2024, 14(20), 9504; https://doi.org/10.3390/app14209504 - 17 Oct 2024
Viewed by 789
Abstract
Biodegradable organic waste offers significant opportunities for resource recovery within the frame of the circular economy. In this work, the effects of carbon-encapsulated iron nanoparticles and ozone pre-treatments in the mesophilic methanogenic stage of a temperature-phased an-aerobic digestion have been studied using biochemical [...] Read more.
Biodegradable organic waste offers significant opportunities for resource recovery within the frame of the circular economy. In this work, the effects of carbon-encapsulated iron nanoparticles and ozone pre-treatments in the mesophilic methanogenic stage of a temperature-phased an-aerobic digestion have been studied using biochemical methanogenic potential (BMP) tests and modeling simulation. To do that, digestates from a pre-treated thermophilic acidogenic reactor that co-digested sludge and wine vinasse were used. The addition of nanoparticles favored the removal of particulate matter, which increased by 9% and 6% in terms of total solids and volatile solids, respectively. When combined with ozone pre-treatment, these increases were 27% and 24%, respectively, demonstrating enhanced AD efficiency. The dose of iron nanoparticles encapsulated in carbon did not result in a statistically significant increase in methane production when sludge and vinasse were used as feedstock. The combination of nanoparticles with the ozone pre-treatment significantly improved the methanogenic phase of the second stage, increasing the methane production yield by 22% and reducing the lag phase from 10 days to 3 days, according to the modified Gompertz model. Full article
(This article belongs to the Special Issue Waste Recycling Materials and Technologies: Latest Advances and Prospects)
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