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Applied Sciences
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Promising Sustainable Technologies in Wastewater Treatment
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Promising Sustainable Technologies in Wastewater Treatment

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

Deadline for manuscript submissions: 20 July 2025 | Viewed by 4193

Special Issue Editors

Dr. Elena Romanovskaia

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA 22904, USA
Interests: waste treatment; electrochemistry; physical chemistry; inorganic chemistry; wastewater treatment; recycling of water treatment and wastewater treatment wastes; nanosized and advanced materials synthesis; nanotechnology in catalysis; corrosion processes
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Veeriah Jegatheesan

E-Mail Website
Guest Editor
School of Engineering and Water: Effective Technologies and Tools (WETT) Research Centre, RMIT University, Melbourne, VIC 3000, Australia
Interests: water (treatment, distribution, modeling); wastewater (MBR, membranes in agriculture, aquaculture); saltwater intrusion; resource recovery (mine tailing ponds, dye and salt from textile effluent); novel technologies (forward osmosis, membrane distillation)
Special Issues, Collections and Topics in MDPI journals
Dr. Valentin Romanovski

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA 22904, USA
Interests: water and wastewater treatment; recycling of industrial wastes; surface disinfection; corrosion/materials degradation; electrochemistry; nanotechnology in water treatment and catalysis; pyrolysis of wastes; synthesis and characterization of advanced materials; engineering failure analysis; feasibility studies
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We would like to invite you to contribute a paper to a Special Issue we are co-editing on the topic of “Promising Sustainable Technologies in Wastewater Treatment”. The aim of this Special Issue is to provide best practices in wastewater treatment approaches and technologies.

The research and development of new directions in the field of wastewater treatment are extremely relevant due to the many factors influencing modern society and the environment. Population growth, urbanization, and industrialization are leading to increased volumes of wastewater, creating significant environmental and sanitation problems. Without proper treatment, wastewater can become a source of water pollution, which negatively affects ecosystems, human health, and quality of life.

Traditional wastewater treatment methods are often insufficient to remove new types of pollutants, such as microplastics, pharmaceuticals, and heavy metals. These substances can have long-term effects on health and ecosystems. This creates a need to develop more efficient and sustainable treatment technologies.

Innovative solutions, such as technologies based on nanomaterials, advanced oxidation methods, and combining known approaches in one stage and others, show high efficiency in removing complex pollutants and improving the quality of wastewater treatment. Automation and the use of artificial intelligence can optimize treatment processes, reducing costs and increasing the productivity of water treatment systems.

The relevance of research in this area is also due to the global sustainable development goals aimed at ensuring access to clean water and sanitation for all. The introduction of new wastewater treatment technologies helps protect water resources, reduce environmental pressures, and improve public health. Therefore, the development and implementation of innovative wastewater treatment methods is a key factor for sustainable development and the well-being of our society.

Dr. Elena Romanovskaia
Prof. Dr. Veeriah Jegatheesan
Dr. Valentin Romanovski
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

  • wastewater treatment
  • sustainable technologies
  • environmental protection
  • innovative solutions
  • green technologies
  • industrial ecology

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (4 papers)

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Research

19 pages, 3361 KiB  
Article
Pollutant Removal Efficiency of Pilot-Scale Horizontal Subsurface Flow Constructed Wetlands Treating Landfill Leachate
by Ioannis Ntountounakis, Ioanna-Eirini Margaritou, Ioannis Pervelis, Pavlos Kyrou, Paraskevas Parlakidis and Georgios D. Gikas
Appl. Sci. 2025, 15(5), 2595; https://doi.org/10.3390/app15052595 - 27 Feb 2025
Viewed by 476
Abstract
Landfill leachate contains various organic and inorganic substances resulting from the decomposition of solid waste. The treatment of this complex mixture is an imperative need for environmental protection. This study used five pilot-scale horizontal subsurface flow (HSF) constructed wetland (CW) units to treat [...] Read more.
Landfill leachate contains various organic and inorganic substances resulting from the decomposition of solid waste. The treatment of this complex mixture is an imperative need for environmental protection. This study used five pilot-scale horizontal subsurface flow (HSF) constructed wetland (CW) units to treat landfill leachate. The main objective was the evaluation of the performance of CW units in the removal of pollutants. The effect of porous media (gravel and zeolite), plants (common reed and cattail), and hydraulic residence time (HRT, 8 and 10 days) were investigated. Two pilot-scale CW units differed in HRT, two in porous media, and three in planting. The results showed that the planted CW units had higher organic matter (OM) and nitrogen (TKN, NH4-N) removal compared with the unplanted unit. The 10-day HRT CW unit had higher average removal rates for all pollutants compared with the CW unit with an 8-day HRT. Finally, the CW unit with zeolite (25%, by volume) in the fill material showed higher average removal rates for OM and nitrogen compared to the unit with gravel. Full article
(This article belongs to the Special Issue Promising Sustainable Technologies in Wastewater Treatment)
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16 pages, 5296 KiB  
Article
Change in Water Quality of the Vistula River During the Emergency Discharge of Untreated Wastewater
by Antoni Grzywna, Urszula Bronowicka-Mielniczuk, Katarzyna Kuśmierz, Joanna Sender and Krzysztof Jóźwiakowski
Appl. Sci. 2024, 14(23), 11338; https://doi.org/10.3390/app142311338 - 5 Dec 2024
Viewed by 930
Abstract
This paper presents an environmental analysis of the impact of an emergency discharge of untreated municipal sewage from the sewage system in Warsaw. This study was based on monitoring water quality in the Vistula River at stations located before and after the discharge [...] Read more.
This paper presents an environmental analysis of the impact of an emergency discharge of untreated municipal sewage from the sewage system in Warsaw. This study was based on monitoring water quality in the Vistula River at stations located before and after the discharge site. Statistical analysis, including correlation analysis and Friedmann’s test, was performed for the data covering eight measurement stations and sixteen chemical parameters. The results confirm the negative impact on the water quality in the river, especially in the mixing zone. In the mixing zone, a statistically significant increase in pollution was found for TN, N-NO3−, N-NH4+, TP, P-PO43+, SS, EC, COD, and TOC. The results of the analysis show the self-cleaning capacity of the river ecosystem and illustrate the response to a sudden, excessive influx of pollution. The direct impact of the untreated sewage discharge was found on a section of the river 1200 m after the place of the failure. The good ecological status and drinking water standards are not met in the mixing zone. The supply of water to the people requires the use of highly effective physical and chemical treatment. Full article
(This article belongs to the Special Issue Promising Sustainable Technologies in Wastewater Treatment)
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30 pages, 9952 KiB  
Article
Effect of Washing Temperature on Adsorption of Cationic Dyes by Raw Lignocellulosic Biomass
by Meryem Bounaas, Abdallah Bouguettoucha, Derradji Chebli, Kerroum Derbal, Abderrezzaq Benalia and Antonio Pizzi
Appl. Sci. 2024, 14(22), 10365; https://doi.org/10.3390/app142210365 - 11 Nov 2024
Cited by 2 | Viewed by 1174
Abstract
This study evaluated the potential of using raw Maclura pomifera and wild carob for the treatment of methylene blue (MB) and crystal violet (CV) as part of the search for new, abundant, and cost-effective natural materials applicable for wastewater treatment. Additionally, it explored [...] Read more.
This study evaluated the potential of using raw Maclura pomifera and wild carob for the treatment of methylene blue (MB) and crystal violet (CV) as part of the search for new, abundant, and cost-effective natural materials applicable for wastewater treatment. Additionally, it explored the impact of washing water temperature on the adsorption performance of these raw organic materials. The physicochemical properties of the materials were characterized using BET, SEM/EDS, and FTIR analyses. The effects of various experimental parameters were investigated through batch adsorption experiments. The results demonstrated that the influence of washing water temperature was material-dependent. For Maclura pomifera, the maximum adsorption capacity of methylene blue and crystal violet decreased from 134.4 and 136.6 mg g−1 for MPC to 67.1 and 90.5 mg g−1 for MPH. In contrast, the adsorption capacities of wild carob biosorbents remained consistent, with the maximum amounts adsorbed for methylene blue and crystal violet by CC, CW, and CH being close, around 78.8 and 98.9 mg g−1, respectively, indicating a minimal effect of washing temperature on this material. The adsorption of both dyes onto the adsorbents was positively affected by increasing the pH, contact time, and initial dye concentration and was negatively affected by increasing adsorbent dose or ionic strength. Adsorption isotherms and kinetics were modeled using various mathematical approaches. The kinetic data were accurately described by a pseudo-second-order model, with a significant contribution from intraparticle diffusion. The Sips and Redlich–Peterson models provided the best fit for the adsorption isotherms of both dyes on the biosorbents. These findings confirm that the selected biomaterials are excellent adsorbents for the removal of cationic dyes. Full article
(This article belongs to the Special Issue Promising Sustainable Technologies in Wastewater Treatment)
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24 pages, 6953 KiB  
Article
Demonstration of Wastewater Recycling in a Slaughterhouse
by Maximilian Philipp, Jonas Pluschke and Sven-Uwe Geißen
Appl. Sci. 2024, 14(19), 8881; https://doi.org/10.3390/app14198881 - 2 Oct 2024
Viewed by 980
Abstract
The implementation of research results in industrial applications is a crucial step in the development of innovative technologies. In this work, slaughterhouse wastewater recycling was successfully realized. The system, comprising a process combination of flotation, membrane bioreactor, and reverse osmosis, was able to [...] Read more.
The implementation of research results in industrial applications is a crucial step in the development of innovative technologies. In this work, slaughterhouse wastewater recycling was successfully realized. The system, comprising a process combination of flotation, membrane bioreactor, and reverse osmosis, was able to treat the wastewater from a medium-sized poultry slaughterhouse in northwestern Tunisia. The process managed to treat approximately one-third of the wastewater to the required standard for agricultural irrigation. An additional 35% was purified to drinking-water quality. The remaining water was discharged as concentrate, meeting the necessary limits for indirect discharge. As a result, the slaughterhouse’s fresh water consumption was reduced by 35% and the amount of wastewater by around 70%. With the combined system, average reductions of 99%, 98%, and 96% were achieved for the parameters COD, TN, and electrical conductivity, respectively. Full article
(This article belongs to the Special Issue Promising Sustainable Technologies in Wastewater Treatment)
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