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Water
Special Issues
Water Purification Processes: Principles, Methods and Applications
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Water Purification Processes: Principles, Methods and Applications

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: closed (20 May 2024) | Viewed by 830

Special Issue Editors

Prof. Dr. Dezhao Liu

E-Mail Website
Guest Editor
Institute of Agricultural Bio-Environmental Engineering, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou‎, China
Interests: odour emission/odorants optimal treatment; mitigation and odour evaluation; air quality and greenhouse gases control and mitigation; livestock and aquaculture wastewater treatment and waste management; resource recovery
Special Issues, Collections and Topics in MDPI journals
Dr. Changwei Li

E-Mail Website
Guest Editor
School of Agricultural Engineering, Jiangsu University, Zhenjiang, China
Interests: environmental regulation and wastewater treatment in aquaculture; intelligent aquatic equipment

Special Issue Information

Dear Colleagues,

One of the major challenges in the world is to provide clean water and sanitation for all. The declining water quality has a direct negative impact on human health and other biological populations. The key to properly addressing the issues of water pollution and water scarcity is to treat and recycle wastewater (and recover resources). Currently, there has been substantial improvement in the design and operation of water and wastewater treatment systems. Although these treatment-technologies have proven to be reliable to treat water and wastewater containing a complex mixture of pollutants, the development and application of innovative hybrid processes and concepts are still needed in order to meet increasingly stringent control regulations. Also, emerging/persisting contaminants (e.g., PFAS and microplastics) and antimicrobial resistant bacteria have recently been found in various water sources, while the conventional technologies are not designed to remove these pollutants. Thus, researchers have also focused on developing hybrid eco-technologies that combine the operational advantages of advanced technologies or physico-chemical treatment systems and conventional biotechnologies in order to better remove these pollutants.

The objective of this Special Issue is to provide a platform for researchers to report new advances in treatment technologies for water purification, disinfection, desalination, and wastewater reuse, etc. Both original research and review articles are welcome.

Potential topics include but are not limited to the following:

  • Wastewater reuse
  • Water purification, disinfection and desalination
  • Pollutant degradation and resourcization
  • Risk assessment and removal of emerging/persisting contaminants
  • Greenhouse gas and odor emission during water treatment
  • Life cycle assessment of water treatment technologies
  • Emerging methods of biological and electrochemical water treatments
  • New materials for water treatment
  • Innovative hybrid wastewater treatment technologies
  • Advances and challenges toward sustainable water treatment

Prof. Dr. Dezhao Liu
Dr. Changwei Li
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

  • water quality
  • pollutant removal
  • risk management
  • resource recycling
  • water and wastewater reuse
  • emerging/persisting contaminants
  • hybrid water treatment technology
  • sustainable water treatment technology

Published Papers (1 paper)

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Research

14 pages, 4142 KiB  
Article
Surface Modification of PVDF and PTFE Hollow Fiber Membranes for Enhanced Nitrogen Removal in a Membrane-Aerated Biofilm Reactor
by Wenfeng Zai, Yangman Chen, Qingdong Qin, Xiangkun Li and Dezhao Liu
Water 2024, 16(12), 1747; https://doi.org/10.3390/w16121747 - 20 Jun 2024
Viewed by 499
Abstract
Microporous membranes such as polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF) often exhibit suboptimal hydrophilicity and microbial adhesion, which impede effective nitrogen removal in membrane-aerated biofilm reactors (MABRs), particularly during initial operational phases. To address this issue, the present study introduced acrylic acid (AA) [...] Read more.
Microporous membranes such as polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF) often exhibit suboptimal hydrophilicity and microbial adhesion, which impede effective nitrogen removal in membrane-aerated biofilm reactors (MABRs), particularly during initial operational phases. To address this issue, the present study introduced acrylic acid (AA) following plasma treatment (P) to enhance membrane performance, thereby engineering a novel composite material optimized for MABR applications. Four MABRs—Reactor with pristine PVDF membrane (R-PVDF), Reactor with composite PVDF membrane (R-PVDF-P-AA), Reactor with pristine PTFE membrane (R-PTFE), and Reactor with composite PTFE membrane (R-PTFE-P-AA)—were evaluated. The modified membranes displayed enhanced roughness and hydrophilicity, which improved biocompatibility and variably increased the oxygen transfer efficiency. Notably, the R-PVDF-P-AA configuration showed a significant enhancement in the removal rates of NH4+-N and total nitrogen (TN), achieving 78.5% and 61.3%, respectively, which was markedly higher than those observed with the original membranes. In contrast, the modified R-PTFE-P-AA exhibited lower removal efficiencies, with NH4+-N and TN reductions of approximately 60.0% and 49.5%. Detailed microbial community analysis revealed that the R-PVDF-P-AA membrane supported robust commensalism between ammonia-oxidizing and denitrifying bacteria, underpinning the improved performance. These findings highlight the critical role of surface chemistry and microbial ecology in optimizing the function of MABRs. Full article
(This article belongs to the Special Issue Water Purification Processes: Principles, Methods and Applications)
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