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Water
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Water and Wastewater Treatment: Latest Advances and Prospects
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Water and Wastewater Treatment: Latest Advances and Prospects

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: closed (30 July 2023) | Viewed by 3552

Special Issue Editors

Dr. Wenhui Gan

E-Mail Website
Guest Editor
School of Civil Engineering, Sun Yat-Sen University, Guangzhou 510275, China
Interests: treatment of emerging contaminants; disinfection and disinfection by-products; water safety and quality; water treatment technology; wastewater reuse
Dr. Zihao Wu

E-Mail Website
Guest Editor
Advanced Institute of Natural Sciences, Beijing Normal University, Beijing, China
Interests: advanced oxidation technology; control of emerging contaminants; water chemistry; radicals; photolysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

As the global population rises, increased urbanization and climate changes are resulting in greater pressures on freshwater resources than ever. Water stress and water risk worldwide is driven by the compounding water scarcity and deteriorating water quality. Improving water and wastewater treatment should be considered as part of the sustainable solution to the ongoing water crisis. Innovative technology in water and wastewater treatment has a vital role to address traditional and emerging threats to water resources. Global research focusing on developing and adopting promising treatment technologies is underway. There is growing momentum to improve water efficiency and water quality, especially in exploring alternative water resources, preventing pollution, eliminating emerging contaminants from water, improving water monitoring, recovering nutrients from wastewater, increasing safety in wastewater reuse and improving the energy efficiency of water treatment.

The present Special Issue intends to bring recent research that exploring the potential of advanced technologies applied in the treatment of wastewater and drinking water. We welcome the submission of fundamental and applied research coving multidisciplinary topics, as well as review papers in relevant topics. Topics of interest include, but are not limited to, the following:

  • Conserving and recovering nutrients and resources from water treatments;
  • Intelligent water unities operations;
  • Mathematical or machine-learning modelling of water treatments;
  • Analysis and fate of emerging contaminants in water treatments;
  • Low-cost and energy-saving water treatment strategies;
  • Development of novel physical, chemical and biological technologies in water treatments (advanced oxidation, nanotechnology, new materials, etc.);
  • (Eco)toxicity assessment of water reuse;
  • Treatments of non-conventional water resources (e.g., rainwater and seawater);
  • Engineering applications of innovative water treatments.

Dr. Wenhui Gan
Dr. Zihao Wu
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. Water 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

  • emerging contaminants
  • nutrient recovery
  • modelling of water treatments
  • water reuse
  • advanced water treatment technologies
  • energy efficiency for water treatment

Published Papers (2 papers)

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Research

14 pages, 3001 KiB  
Article
Insights into the Responses of the Partial Denitrification Process to Elevated Perfluorooctanoic Acid Stress: Performance, EPS Characteristic and Microbial Community
by Shaoqing Zhang, Hang Zhang, Yucheng Feng, Naga Raju Maddela, Shugeng Li and Liqiu Zhang
Water 2023, 15(16), 2977; https://doi.org/10.3390/w15162977 - 18 Aug 2023
Viewed by 1052
Abstract
This study aimed at investigating the potential impacts of perfluorooctanoic acid (PFOA) exposure on the partial denitrification (PD) system. Our results indicated that nitrite accumulation rates were significantly decreased to 67.94 ± 1.25%–69.52 ± 3.13% after long-term PFOA exposure (0.5–20 mg/L), while the [...] Read more.
This study aimed at investigating the potential impacts of perfluorooctanoic acid (PFOA) exposure on the partial denitrification (PD) system. Our results indicated that nitrite accumulation rates were significantly decreased to 67.94 ± 1.25%–69.52 ± 3.13% after long-term PFOA exposure (0.5–20 mg/L), while the nitrate transformation ratio was slightly impacted. The PFOA removal efficiency gradually decreased from 67.42 ± 3.39% to 6.56 ± 5.25% with an increasing PFOA dosage, indicating that the main PFOA removal pathway was biosorption. The average EPS contents increased by two folds, which suggested that exposure to PFOA significantly stimulated EPS secretion. Excitation emission matrix analysis revealed that PFOA exposure promoted the secretion of tryptophan protein-like, humic acid-like, and aromatic protein II-like substances, which may act as a protective barrier against PFOA toxicity. Moreover, significant changes in characteristic peaks after PFOA exposure were shown as indicated by Fourier transform infrared spectroscopy. High-throughput sequencing suggested that PFOA significantly decreased bacterial richness and increased evenness, indicating that toxicity effects of PFOA were more pronounced for abundant species (e.g., Thauera) than rare species. Thauera was the most dominant genus responsible for nitrite accumulation, whose abundance significantly decreased from 35.99 ± 2.67% to 18.60 ± 2.18% after PFOA exposure. In comparison, the abundances of common denitrifiers, such as Denitratisoma, Bdellovibrio, and OLB8, significantly increased, suggesting that these genera were potential PFOA-resistant bacteria. This study presents new insights into the effect of PFOA on a PD system. Full article
(This article belongs to the Special Issue Water and Wastewater Treatment: Latest Advances and Prospects)
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16 pages, 3218 KiB  
Article
Impact of a Sand Filtration Pretreatment Step on High-Loaded Greywater Treatment by an Electrocoagulation Technique
by Khalid Bani-Melhem, Abeer Al Bsoul, Zakaria Al-Qodah, Nada Al-Ananzeh, Muhammad Rasool Al-Kilani, Mohammad Al-Shannag and Walid Bani-Salameh
Water 2023, 15(5), 990; https://doi.org/10.3390/w15050990 - 05 Mar 2023
Cited by 6 | Viewed by 2008
Abstract
Greywater (GW) treatment by the electrocoagulation (EC) technique alone might not meet the required standards in terms of pollutant removal, specifically when GW contains high loads of pollutants. In this preliminary study, a sand filtration (SF) unit was integrated with the EC technique [...] Read more.
Greywater (GW) treatment by the electrocoagulation (EC) technique alone might not meet the required standards in terms of pollutant removal, specifically when GW contains high loads of pollutants. In this preliminary study, a sand filtration (SF) unit was integrated with the EC technique as a pretreatment step to enhance the EC process for treating high-loaded GW. Three different voltage gradients were investigated (5 V/cm, 10 V/cm, and 15 V/cm) in the EC unit. The results demonstrated that the pretreatment SF step can contribute significantly to reducing pollutant concentrations in the greywater to be treated by EC. In terms of physical impurities, the results showed that the SF pretreatment step reduced the turbidity and the color of the treated GW by 28.4%, and 9.4%, respectively. The COD concentration was reduced by 25.5% by the SF step, which allowed a reduction of EC steady state time in the EC unit from 45 min to 30 min at an applied voltage of 15 V/cm. In addition, a high COD removal rate of 87.8% from high-load greywater was achieved with an energy consumption of only 4.11 kWh/m3 in comparison with 6.21 kWh/m3 without the SF step, which is equivalent to a 34% saving in energy consumption. Full article
(This article belongs to the Special Issue Water and Wastewater Treatment: Latest Advances and Prospects)
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