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Membranes
Special Issues
Advanced Membrane-Based Technologies for Water and Wastewater Treatment
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Advanced Membrane-Based Technologies for Water and Wastewater Treatment

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Applications".

Deadline for manuscript submissions: closed (29 February 2020)

Special Issue Editors

Prof. Dr. Jiangyong Hu

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering, National University of Singapore, Singapore 119077, Singapore
Interests: emerging contaminants removal; advanced oxidation process; water treatment and reuse
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Say Leong Ong

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
Interests: water quality enhancement; water reclamation and reuse, biotreatment processes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Water is an essential life-supporting commodity. It is essential for food and energy production. Its availability also determines the social and economic development of every nation. However, water quality deterioration due to population and economic growth has become a common problem occurring in many parts of the world. Thus, enhancing water quality is a crucial task for any nation seeking to achieve sustainable development.

Membrane technology, among other alternative treatment technologies, is becoming increasingly popular for water and wastewater treatment due to its excellent capability to enhance water quality. For example, polymer and ceramic membranes have been widely used for various application scenarios. In recent years, novel membrane systems have been explored for addressing emerging water quality issues such as emerging contaminates and microorganisms in water. Hybrid membrane systems have also been researched and developed recently by water researchers and professionals. However, there is still room for further development on novel membrane technology for cost-effective water and used water treatment, particularly for water reclamation.

In view of the above observation, this Special Issue intends to focus on papers on novel developments and/or applications of membrane system/technology for water and wastewater treatment and water reclamation. In particular, we would like to welcome contributions focusing on novel membrane system/technology as well as hybrid membrane system research and development to tackle emerging water quality issues. Both technical and reviewers papers are welcome.

We look forward to your contributions!

Prof. Dr. Jiangyong Hu
Prof. Dr. Say-Leong Ong
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. Membranes 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 2200 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

  • membrane process
  • water quality enhancement
  • water and wastewater treatment

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Published Papers (1 paper)

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Research

13 pages, 1548 KiB  
Article
Hybrid Hollow Fiber Nanofiltration–Calcite Contactor: A Novel Point-of-Entry Treatment for Removal of Dissolved Mn, Fe, NOM and Hardness from Domestic Groundwater Supplies
by Maryam Haddad and Benoit Barbeau
Membranes 2019, 9(7), 90; https://doi.org/10.3390/membranes9070090 - 19 Jul 2019
Cited by 7 | Viewed by 4076
Abstract
Groundwater (GW) is one of the main potable water sources worldwide. However, the presence of undesirable compounds and particularly manganese (Mn) and iron (Fe) (mainly co-existing in GWs) are considered as objectionable components of potable water for both health and aesthetic issues. As [...] Read more.
Groundwater (GW) is one of the main potable water sources worldwide. However, the presence of undesirable compounds and particularly manganese (Mn) and iron (Fe) (mainly co-existing in GWs) are considered as objectionable components of potable water for both health and aesthetic issues. As such, individual dwellings supplied by domestic wells are especially threatened by these issues. Current domestic treatment technologies are complicated to operate and even dangerous if improperly maintained (e.g., catalytic filtration) or consume salts and produce spent brine which pollutes the environment (i.e., ion exchange resins). Therefore, it is of prime importance to design a simple and compact, yet robust, system for Mn and Fe control of the domestic GW sources, which can reliably guarantee the desired Mn limit in the finished water ( 20 μ g/L). In the course of this study, we demonstrated, for the first time, that a hybrid hollow fiber nanofiltration (HFNF)–calcite contactor process is a promising alternative for treating domestic GWs with elevated levels of Mn, Fe, natural organic matter (NOM) and hardness. The efficacy of the HFNF membranes in terms of removal of Mn, Fe, NOM and fouling was compared with commercially available NF270 and NF90 membranes. The results revealed that HFNF (100–200 Da) and NF90 maintained considerably high rejection of Mn, Fe and NOM due to their dominant sieving effect. In contrary, the rejections of the above-mentioned components were decreased in the presence of high hardness for the looser HFNF (200–300 Da) and NF270 membranes. No membrane fouling was detected and the permeate flux was stable when the hard GW was filtered with the HFNF membranes, regardless of their molecular weight cut-off and transmembrane pressure, while the permeability of the NF270 and NF90 membranes steadily decline during the filtration. Integrating a calcite contactor, as a post filtration step, to the HFNF process yielded further Mn, Fe and NOM removals from the HFNF permeate and adjustment of its hardness level. The best performance was achieved when a blend of Calcite–CorosexTM ( 90 / 10 wt . % ) was used as a post-treatment to the tight HFNF (100–200 Da). Full article
(This article belongs to the Special Issue Advanced Membrane-Based Technologies for Water and Wastewater Treatment)
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