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Advanced and Modern Processes of Wastewater Treatment
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Special Issue "Advanced and Modern Processes of Wastewater Treatment"

A special issue of Resources (ISSN 2079-9276).

Deadline for manuscript submissions: closed (20 June 2023) | Viewed by 2374

Special Issue Editors

Dr. Elisavet Amanatidou

E-Mail Website
Guest Editor
Chemical Eng. Department, University of Western Macedonia, Kozani, Greece
Interests: environmental engineering; wastewater engineering; biological treatment; wastewater management; advanced wastewater treatment; new technologies; GHGs emissions; bioenergy production; sustainability in waste water treatment
Dr. Georgios Samiotis

E-Mail Website
Guest Editor
Chemical Eng. Department, University of Western Macedonia, Kozani, Greece
Interests: environmental engineering; wastewater engineering; biological treatment; waste sludge reduction; GHGs emissions; nanomaterials in wastewater treatment; cyanobacteria-based wastewater treatment; bio-hydrogen production

Special Issue Information

Dear Colleagues,

Aim

The special Issue of Resources journal entitled ‘’Advanced and Modern Processes of Wastewater Treatment’’ aims at publishing high impact research on the wastewater treatment processes and technologies with reduced environmental footprint to achieve the goal of sustainable development and greater social benefit.  

Scope

The special Issue publishes refereed, original research papers on modern and advanced physical, chemical, and biological wastewater treatment processes. The topics of interest include but are not limited to tertiary/advanced treatment, active carbon filtration, biological degradation/assimilation, membrane filtration technology, oxidation technologies, selective removal/recovery of contaminants/micropollutants and green energy generation.

An outline of the Issue's scope includes:

  • Sustainable wastewater treatment
  • Mitigation of GHGs emissions in wastewater treatment
  • Waste sludge minimization in biological treatment
  • Reduced energy and chemicals consumption
  • Resources recovery and water reuse in wastewater treatment
  • Valorization of wastewaters
  • Microalgae and cyanobacteria-based wastewater treatment
  • Green energy production in wastewater treatment sector
  • Advanced oxidation and membrane processes in wastewater treatment
  • Advances in anaerobic wastewater treatment
  • Development/application of novel materials and Nanotechnology in wastewater treatment

This issue fills the literature gap regarding the combination of modern and advanced processes that lead to sustainable development and adaptation of new strategies in the field of wastewater treatment.

Dr. Elisavet Amanatidou
Dr. Georgios Samiotis
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. Resources is an international peer-reviewed open access monthly 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 1600 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.

Published Papers (3 papers)

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Research

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Article
Improvement of MBBR Performance by the Addition of 3D-Printed Biocarriers Fabricated with 13X and Bentonite
by
Dimitra C. Banti
,
Petros Samaras
,
Afroditi G. Chioti
,
Anastasios Mitsopoulos
,
Michail Tsangas
,
Antonis Zorpas
and
Themistoklis Sfetsas
Resources 2023, 12(7), 81; https://doi.org/10.3390/resources12070081 - 10 Jul 2023
Viewed by 574
Abstract
The current study investigated the performance of a moving bed biofilm reactor (MBBR), when adding 3D-printed biocarriers fabricated with 13X and bentonite (MBBR 3D), when using K1 commercial biocarriers (MBBR K1) and when not adding biocarriers at all (control MBBR). For the evaluation [...] Read more.
The current study investigated the performance of a moving bed biofilm reactor (MBBR), when adding 3D-printed biocarriers fabricated with 13X and bentonite (MBBR 3D), when using K1 commercial biocarriers (MBBR K1) and when not adding biocarriers at all (control MBBR). For the evaluation of the MBBR efficiency, various physicochemical parameters were measured, while biofilm extracted from the biocarriers was evaluated. The findings suggest that there is an optimal biodegradation of the organic load in all MBBR units. The nitrification and denitrification processes were improved in MBBR 3D as compared to the control MBBR and MBBR K1. The dry mass of the biofilm in the 3D-printed biocarriers was two orders of magnitude larger than in the K1 biocarriers. Moreover, in the K1 biocarriers the mass of the biofilm varied in relation to time, since it could not be protected inside the holes, something that did not happen with the 3D-printed biocarriers. Finally, it was found, mostly in MBBR 3D and less in MBBR K1, that the growth of nitrifying bacteria and heterotrophs inside the units increased the biomass production in the form of soluble microbial products, which in turn favored the adhesion of biomass on the surface of biocarriers. Full article
(This article belongs to the Special Issue Advanced and Modern Processes of Wastewater Treatment)
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Article
Application of Metallic Iron and Ferrates in Water and Wastewater Treatment for Cr(VI) and Organic Contaminants Removal
by
Georgios Samiotis
,
Adam Stimoniaris
,
Ilias Ristanis
,
Liana Kemmou
,
Charoula Mavromatidou
and
Elisavet Amanatidou
Resources 2023, 12(3), 39; https://doi.org/10.3390/resources12030039 - 20 Mar 2023
Viewed by 1026
Abstract
Iron species can act as electron donors, electron acceptors or serve as a sorbent to co-precipitate contaminants. These properties, along with its relatively low cost as a material, make iron an ideal compound for environmental applications in the removal of pollutants from water [...] Read more.
Iron species can act as electron donors, electron acceptors or serve as a sorbent to co-precipitate contaminants. These properties, along with its relatively low cost as a material, make iron an ideal compound for environmental applications in the removal of pollutants from water and wastewater. This study assesses the use of metallic iron as a reductant for the removal of toxic Cr(VI) from aqueous solutions, as well as the use of hexavalent iron (ferrates) for the removal of organic compounds, turbidity and biological contaminants from water and wastewater. Laboratory-scale experiments show that the Cr(VI) removal efficiency of metallic iron filling materials, such as scrap iron fillings, via reduction to Cr(III) and the subsequent precipitation/filtration of aggregates can reach values over 99.0%. Moreover, the efficiency of ferrates, in situ synthesized via a low-cost Fe0/Fe0 electrochemical cell, in the removal of organic compounds, turbidity and biological contaminants from high-strength industrial wastewater, biologically treated wastewater and natural water can also reach values over 99.0%. The results showed that iron species can be applied in low-cost and environmentally friendly technologies for natural water remediation and wastewater treatment. Furthermore, the study showed that the challenge of an iron material’s surface passivation, as well as of ferrates’ procurement cost and stability, can be resolved via the application of ultrasounds and via in situ ferrate electrosynthesis. Full article
(This article belongs to the Special Issue Advanced and Modern Processes of Wastewater Treatment)
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Review

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Review
Factors Affecting Nitrous Oxide Emissions from Activated Sludge Wastewater Treatment Plants—A Review
by
Liana Kemmou
and
Elisavet Amanatidou
Resources 2023, 12(10), 114; https://doi.org/10.3390/resources12100114 - 25 Sep 2023
Viewed by 297
Abstract
Nitrous oxide (N2O) is a greenhouse gas contributing to ozone layer depletion and climate change. Wastewater treatment plants (WWTPs) contribute significantly to the global anthropogenic N2O emissions. The main factors affecting N2O emissions are the dissolved oxygen [...] Read more.
Nitrous oxide (N2O) is a greenhouse gas contributing to ozone layer depletion and climate change. Wastewater treatment plants (WWTPs) contribute significantly to the global anthropogenic N2O emissions. The main factors affecting N2O emissions are the dissolved oxygen concentration (DO), the nitrite accumulation, the rapidly changing process conditions, the substrate composition and COD/N ratio, the pH, and the temperature. Low DO in the nitrification process results in higher N2O emissions, whereas high aeration rate in the nitration/anammox process results in higher N2O production. High DO in the denitrification inhibits the N2O reductase synthesis/activity, leading to N2O accumulation. High nitrite accumulation in both the nitrification and denitrification processes leads to high N2O emissions. Transient DO changes and rapid shifts in pH result in high N2O production. Ammonia shock loads leads to incomplete nitrification, resulting in NO2− accumulation and N2O formation. Limiting the biodegradable substrate hinders complete denitrification, leading to high N2O production. A COD/N ratio above 4 results in 20–30% of the nitrogen load being N2O emissions. Maximum N2O production at low pH (pH = 6) was observed during nitrification/denitrification and at high pH (pH = 8) during partial nitrification. High temperature enhances the denitrification kinetics but produces more Ν2O emissions. Full article
(This article belongs to the Special Issue Advanced and Modern Processes of Wastewater Treatment)
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