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Advanced Technologies for Energy and Resource Recovery from Water and Wastewater

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "B: Energy and Environment".

Deadline for manuscript submissions: 5 June 2026 | Viewed by 4250

Special Issue Editor


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Guest Editor
Department of Technology in Environmental Engineering, Faculty of Civil Engineering and Environmental Sciences, Białystok University of Technology, St. Wiejska 45A, 15-351 Bialystok, Poland
Interests: water and wastewater treatment; water and wastewater quality; water pollution monitoring; environment contamination and control; environment protection; energy efficiency
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Special Issue Information

Dear Colleagues,

In the face of the global challenges of increasing energy demand and limited natural resources, technologies for energy and resource recovery from water and wastewater are becoming a key component of sustainable development. Through this Special Issue, entitled "Advanced Technologies for Energy and Resource Recovery from Water and Wastewater" of our journal Energies, we invite you to discover the latest breakthroughs that are changing the way we view water and wastewater management.

From advanced membrane and bioelectrochemical technologies to hybrid systems and smart digital solutions, the authors of the works published in this Special Issue share unique developments that not only minimize waste, but also transform it into valuable products. Each article in this Issue acts as a step forward towards a more efficient, economical and environmentally friendly future.

We invite you to read on and discover the potential innovative technologies that turn challenges into opportunities—for science, industry and society. Now is the time for innovative approaches to water and energy management. Join the discussion and be a part of this revolution!

Topics of interest for publication include, but are not limited to, the following:

  • Energy recovery technologies:
  • Anaerobic digestion and biogas production;
  • Bioelectrochemical systems (e.g., microbial fuel cells, microbial electrolysis cells);
  • Thermochemical processes for energy recovery;
  • Integration of renewable energy in water and wastewater treatment systems.
  • Resource recovery innovations:
  • Recovery of nutrients (e.g., phosphorus, nitrogen);
  • Extraction of valuable compounds (e.g., bioplastics, biochar, rare earth elements);
  • Membrane-based separation technologies for resource recovery;
  • Circular economy approaches in water and wastewater management.
  • Advanced treatment technologies:
  • Hybrid and multi-stage treatment systems;
  • Nanomaterials and advanced catalysts for resource and energy recovery;
  • Sustainable approaches to desalination and water reuse;
  • Digital and smart technologies for optimizing treatment processes.
  • Environmental and economic assessments:
  • Life cycle assessment (LCA) of recovery technologies;
  • Techno-economic analysis of innovative treatment processes;
  • Policy frameworks and incentives for implementing recovery technologies;
  • Case studies demonstrating successful industrial applications.
  • Future perspectives and innovations:
  • Emerging technologies for decentralized resource recovery;
  • Climate-resilient water and wastewater management systems;
  • Cross-sectoral approaches to resource and energy recovery;
  • Artificial intelligence and machine learning in system optimization.

This Special Issue welcomes original research articles, reviews, and case studies that contribute to advancing the science, technology, and practical applications of energy and resource recovery from water and wastewater.

Prof. Dr. Iwona Skoczko
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 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. Energies 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 2600 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

  • energy recovery
  • resource recovery
  • circular economy
  • bioelectrochemical systems
  • nutrient recovery
  • membrane technologies
  • advanced treatment systems
  • renewable energy integration
  • life cycle assessment (LCA)
  • techno-economic analysis
  • sustainable water treatment
  • climate resilience
  • artificial intelligence in water management
  • bio-based products
  • hybrid treatment systems
  • water reuse

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Published Papers (3 papers)

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Research

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27 pages, 4435 KB  
Article
Design and Experimental Validation of an Asymmetric Four-Chamber Redox Flow Desalination Cell for Energy-Efficient Ion Removal
by Aung Ko Ko, Joohan Bae and Jaeyoung Lee
Energies 2025, 18(24), 6529; https://doi.org/10.3390/en18246529 - 12 Dec 2025
Viewed by 841
Abstract
An asymmetric four-chamber redox flow desalination cell was developed to enhance ion transport and energy efficiency by controlling chamber geometry, applied voltage, and electrolyte flow rate. The design integrates thick outer redox chambers with thin desalination chambers to promote uniform redox reactions and [...] Read more.
An asymmetric four-chamber redox flow desalination cell was developed to enhance ion transport and energy efficiency by controlling chamber geometry, applied voltage, and electrolyte flow rate. The design integrates thick outer redox chambers with thin desalination chambers to promote uniform redox reactions and stable mass transfer. The system operated stably for 12 h and achieved a high salt removal rate of approximately 1226 mmol·m−2·h−1 at 1.0 V with low specific energy consumption of about 99.74 kJ·mol−1, demonstrating both durable operation and highly promising desalination performance. Electrochemical impedance analysis further confirmed that increased electrolyte flow reduces charge-transfer and diffusion resistances, enabling faster ionic transport. These findings highlight the originality of the chamber-asymmetric design and its promise for compact, low-voltage redox flow systems. This work provides design guidelines for next-generation flow-based desalination systems and suggests future research directions in scaling the architecture, optimizing flow-channel geometry, and integrating higher-stability redox electrolytes for long-term practical operation. Full article
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15 pages, 5595 KB  
Article
Enhanced Methane Production in the Anaerobic Digestion of Swine Manure: Effects of Substrate-to-Inoculum Ratio and Magnetite-Mediated Direct Interspecies Electron Transfer
by Jung-Sup Lee, Tae-Hoon Kim, Byung-Kyu Ahn, Yun-Ju Jeon, Ji-Hye Ahn, Waris Khan, Seoktae Kang, Junho Kim and Yeo-Myeong Yun
Energies 2025, 18(17), 4692; https://doi.org/10.3390/en18174692 - 4 Sep 2025
Cited by 1 | Viewed by 1852
Abstract
Improving the anaerobic digestion (AD) of swine manure is crucial for sustainable waste-to-energy systems, given its high organic load and process instability risks. This study examined the combined effects of substrate-to-inoculum ratio (SIR, 0.1–3.2) and magnetite-mediated direct interspecies electron transfer on biogas production, [...] Read more.
Improving the anaerobic digestion (AD) of swine manure is crucial for sustainable waste-to-energy systems, given its high organic load and process instability risks. This study examined the combined effects of substrate-to-inoculum ratio (SIR, 0.1–3.2) and magnetite-mediated direct interspecies electron transfer on biogas production, effluent quality, and microbial community dynamics. The highest methane yield (262 ± 10 mL CH4/g COD) was obtained at SIR 0.1, while efficiency declined at higher SIRs due to acid and ammonia accumulation. Magnetite supplementation significantly improved methane yield (up to a 54.1% increase at SIR 0.2) and reduced the lag phase, particularly under moderate SIRs. Effluent characterization revealed that low SIRs induced elevated soluble COD (SCOD) levels, attributed to microbial autolysis and extracellular polymeric substance release. Furthermore, magnetite addition mitigated SCOD accumulation and shifted molecular weight distributions toward higher fractions (>15 kDa), indicating enhanced microbial activity and structural polymer formation. Microbial analysis revealed that magnetite-enriched Syntrophobacterium and Methanothrix promoted syntrophic cooperation and acetoclastic methanogenesis. Diversity indices and PCoA further showed that both SIR and magnetite significantly shaped microbial structure and function. Overall, an optimal SIR range of 0.2–0.4 under magnetite addition provided a balanced strategy for enhancing methane recovery, effluent quality, and microbial stability in swine manure AD. Full article
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Review

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18 pages, 1800 KB  
Review
Challenges of Power Generation by Reverse Electrodialysis
by Marian Turek and Krzysztof Mitko
Energies 2026, 19(4), 1061; https://doi.org/10.3390/en19041061 - 19 Feb 2026
Cited by 1 | Viewed by 961
Abstract
Reverse electrodialysis (RED) is a power generation method that harnesses the energy of mixing high- and low-salinity solutions through ion migration across ion-exchange membranes. While it is being extensively investigated as an environmentally friendly technology that utilizes renewable materials and generates no air [...] Read more.
Reverse electrodialysis (RED) is a power generation method that harnesses the energy of mixing high- and low-salinity solutions through ion migration across ion-exchange membranes. While it is being extensively investigated as an environmentally friendly technology that utilizes renewable materials and generates no air pollution, it also has severe limitations that put RED’s technical and economic feasibility into question. This paper discusses RED’s geographical, technical, and economic limitations and provides a critical review of the attempts at addressing them. We conclude that the pretreatment costs and the capital investment costs are prohibitively expensive, making RED uneconomical compared to other renewable energy generation methods. Full article
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