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Selected Papers from the "2nd European Congress on Renewable Energy...
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Selected Papers from the "2nd European Congress on Renewable Energy and Sustainable Development—Energy Trends 2024"

A special issue of Biomass (ISSN 2673-8783).

Deadline for manuscript submissions: 31 March 2025 | Viewed by 7347

Special Issue Editor

Dr. Olga Tiron

E-Mail Website
Guest Editor
Department of Environmental Technologies and Technology Transfer, National Research and Development Institute for Industrial Ecology—ECOIND, Bucharest, Romania
Interests: renewable resources; bioremediation; microalgae biotechnology; biomass harnessing; biofuels; sustainable wastewater treatment technologies; net-zero energy; carbon models

Special Issue Information

Dear Colleagues,

I am pleased to announce the launch of the Special Issue, entitled “Selected Papers from the 2nd European Congress on Renewable Energy and Sustainable Development—Energy Trends 2024” (https://renewableenergyconferences.com). This will be published by a peer-reviewed, open access journal, Biomass, focusing on the advancement of knowledge and technology in related areas.

I invite you to take advantage of the opportunity to contribute to this Special Issue with a research article, review, or short communication on presenting data collected from monitoring activities, innovative solutions provided to the energy sector, results of collaborative projects, study cases, model-based predictions, or any other relevant information that can help to address current challenges in the fields of energy, environment, and sustainable development.

With your research input, we can strengthen the path toward a sustainable energy future and accelerate the adoption of ideas and solutions by consumers and market actors.

Dr. Olga Tiron
Guest Editor

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. Biomass is an international peer-reviewed open access quarterly 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 1000 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

  • renewable energy and resources
  • biofuels and bioenergy
  • sustainable development
  • environmental policy and impact
  • waste and residue management
  • sustainable finance
  • non-renewable energy and resources
  • industrial processes
  • energy conversion, storage, and analysis
  • power and energy engineering

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  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
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Further information on MDPI's Special Issue polices can be found here.

Published Papers (4 papers)

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Research

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13 pages, 2957 KiB  
Article
Production, Extraction and Partial Characterization of Natural Pigments from Chryseobacterium sp. kr6 Growing on Feather Meal Biomass
by Sabrine Gemelli, Silvana Terra Silveira, Maria Elisa Pailliè-Jiménez, Alessandro de Oliveira Rios and Adriano Brandelli
Biomass 2024, 4(2), 530-542; https://doi.org/10.3390/biomass4020028 - 3 Jun 2024
Viewed by 1279
Abstract
Obtaining natural pigments from microorganisms is an alternative with high potential for biotechnological application. The use of agro-industrial wastes as substrate for cultivations enables a reduction of the production cost and may add value to potentially polluting byproducts. In this work, the extraction [...] Read more.
Obtaining natural pigments from microorganisms is an alternative with high potential for biotechnological application. The use of agro-industrial wastes as substrate for cultivations enables a reduction of the production cost and may add value to potentially polluting byproducts. In this work, the extraction of pigments produced by the bacterium Chryseobacterium sp. strain kr6 was evaluated, employing feather meal as the sole carbon source for bacterial growth. The maximum production of the yellow pigments was observed for cultivation at 30 °C, during 48 h, with 5 g/L feather meal. The pigment extraction from the bacterial biomass was performed with the aid of physical methods and the testing of different organic solvents. The conditions that provided better extraction were using ultrasound with acetone as the solvent, reaching a yield of 180 μg/g biomass after optimization. The pigment was partially characterized via UV-visible, FTIR and mass spectroscopy and CIELAB color parameters, suggesting the presence of molecules belonging to the flexirubin group (aryl polyenes). The antioxidant capacity of the pigment was confirmed via the scavenging of DPPH radical and thiobarbituric acid reactive substances (TBARS) methodologies. Moreover, the pigment extract showed antimicrobial activity against Staphylococcus aureus and Enterococcus faecalis. Full article
(This article belongs to the Special Issue Selected Papers from the "2nd European Congress on Renewable Energy and Sustainable Development—Energy Trends 2024")
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15 pages, 3961 KiB  
Article
Edible Paper Sheets from Alternanthera philoxeroides and Hypophthalmichthys molitrix: Smart Biomass Valorization
by Sharmin Suraiya, Mst. Ayesha Siddika Mohona, Mst Fatema, Monjurul Haq, Md. Anisur Rahman and Subrata Mondal
Biomass 2024, 4(2), 414-428; https://doi.org/10.3390/biomass4020020 - 9 May 2024
Cited by 3 | Viewed by 890
Abstract
Alternanthera philoxeroides and Hypophthalmichthys molitrix offer significant nutritional benefits. This study evaluates the proximate composition, amino acid profile, GC-MS analysis, FT-IR spectroscopy, SEM and EDX, and color values of edible paper sheets (EPSs) derived from Alternanthera philoxeroides incorporating different levels of Hypophthalmichthys molitrix [...] Read more.
Alternanthera philoxeroides and Hypophthalmichthys molitrix offer significant nutritional benefits. This study evaluates the proximate composition, amino acid profile, GC-MS analysis, FT-IR spectroscopy, SEM and EDX, and color values of edible paper sheets (EPSs) derived from Alternanthera philoxeroides incorporating different levels of Hypophthalmichthys molitrix flesh. The protein content in the EPSs varied based on fish flesh incorporation, peaking at 52.66% in Ap100/Hm300 (Non-boil). Protein and carbohydrate contents showed an inverse correlation across EPSs, with the highest carbohydrate content of 60.89% in sample Ap400/Hm0 (Boil). Lipid content was also found to correlate with H. molitrix flesh content in EPSs, ranging from 1.59% to 18.41%. Amino acid analysis identified 11 types, with methionine as the most prevalent, followed by leucine, phenylalanine, and lysine. GC-MS analysis revealed 51 bioactive compounds, including carbonic acid, hentriacontane, and various fatty acids. FT-IR analysis showed characteristic bonds, while color analysis displayed L* values ranging from 24.37 to 30.97. SEM analyses depicted the microstructure, surface view, and elemental composition of the EPSs, and EDX showed an abundance of Ca, N, K, O, C, Mg, Na, P, Cl, Mn, and Fe. Therefore, EPSs prepared from A. philoxeroides and H. molitrix could offer a promising approach for effectively utilizing aquatic biomass and providing both plant and animal nutrients to consumers. Full article
(This article belongs to the Special Issue Selected Papers from the "2nd European Congress on Renewable Energy and Sustainable Development—Energy Trends 2024")
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Review

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20 pages, 958 KiB  
Review
Biomass and Circular Economy: Now and the Future
by Chen-Jie Hsiao and Jin-Li Hu
Biomass 2024, 4(3), 720-739; https://doi.org/10.3390/biomass4030040 - 5 Jul 2024
Cited by 1 | Viewed by 2252
Abstract
Biomass is inherently organic and renewable, promoting a circular economy ecosystem. As global consumption patterns change, circular economy strategies have turned into sustainable net-zero strategies for developing countries and developed countries, and its value chain is now included in important biomass energy policies. [...] Read more.
Biomass is inherently organic and renewable, promoting a circular economy ecosystem. As global consumption patterns change, circular economy strategies have turned into sustainable net-zero strategies for developing countries and developed countries, and its value chain is now included in important biomass energy policies. Many countries are actively transforming their economic growth patterns, developing their own circular economy, targeting ecological sustainable development, and adjusting domestic industrial structures. The concept of a circular society, synergistic with the social economy and developed on the basis of the circular economy, has production and consumption at its core. This research aims to verify the important roles that biomass plays in the circular economy and to initiate a virtuous resource circulation model, promote material recycling and reuse, form a “resources-products-renewable resources” model, and promote better resource use efficiency. It discusses the important roles that the bioeconomy plays when achieving a circular economy and also proposes new economic and policy concepts. The key conclusions cover: (1) the biomass energy–circular economy business model; (2) recognizing the co-benefit of consumers and a prosumer circular economy; and (3) challenges to a renewable cycle under economic applications. Full article
(This article belongs to the Special Issue Selected Papers from the "2nd European Congress on Renewable Energy and Sustainable Development—Energy Trends 2024")
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25 pages, 1606 KiB  
Review
Hydrochar Production by Hydrothermal Carbonization: Microwave versus Supercritical Water Treatment
by Modupe Elizabeth Ojewumi and Gang Chen
Biomass 2024, 4(2), 574-598; https://doi.org/10.3390/biomass4020031 - 6 Jun 2024
Cited by 1 | Viewed by 1992
Abstract
Hydrochar, a carbonaceous material produced through hydrothermal carbonization of lignocellulosic biomass, has gained significant attention due to its versatile applications in agriculture, energy, and environmental protection. This review extensively explores hydrochar production by hydrothermal carbonization, specifically microwave and supercritical water treatment. These innovative [...] Read more.
Hydrochar, a carbonaceous material produced through hydrothermal carbonization of lignocellulosic biomass, has gained significant attention due to its versatile applications in agriculture, energy, and environmental protection. This review extensively explores hydrochar production by hydrothermal carbonization, specifically microwave and supercritical water treatment. These innovative approaches hold substantial promises in enhancing the efficiency and sustainability of hydrochar synthesis. The review commences with an in-depth analysis of the fundamental principles governing hydrochar production, emphasizing the distinct mechanisms of microwave and supercritical water treatment. Insightful discussions on the influence of critical process parameters, such as temperature, pressure, and residence time, underscore these factors’ pivotal role in tailoring hydrochar characteristics. Drawing on a wide array of research findings, the review evaluates the impact of different lignocellulosic biomass feedstocks on hydrochar properties, which is crucial for optimizing hydrochar production. The comparative assessment of microwave and supercritical water treatment sheds light on their unique advantages and challenges, guiding researchers toward informed decision-making in selection of methods. Furthermore, the review delves into the myriad applications of hydrochar, spanning soil amendment, carbon sequestration, and renewable energy. Environmental considerations and life cycle assessments associated with microwave and supercritical water treatment are also explored, providing a holistic perspective on the sustainability of hydrochar production. In conclusion, this comprehensive review synthesizes current knowledge on hydrochar production from diverse lignocellulosic biomass sources, emphasizing the efficacy of microwave and supercritical water methods. Full article
(This article belongs to the Special Issue Selected Papers from the "2nd European Congress on Renewable Energy and Sustainable Development—Energy Trends 2024")
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