Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
6.1
3.3
Journals
Membranes
Special Issues
In Process Wetting Prevention in Membrane Distillation
share announcement

In Process Wetting Prevention in Membrane Distillation

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

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 8631

Special Issue Editors

Prof. Dr. Wolfgang M. Samhaber

E-Mail Website
Guest Editor
Institute of Process Engineering (IVT), Johannes Kepler University Linz, Altenberger Str. 69, A-4040 Linz, Austria
Interests: membrane distillation
Dr. Mohammad Rezaei

E-Mail Website
Guest Editor
Institute of Process Engineering (IVT), Johannes Kepler University Linz, Altenberger Str. 69, A-4040 Linz, Austria
Interests: membrane distillation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear colleagues,

The wetting phenomenon is wildly recognized as the core hindrance in the real industrial application of the membrane distillation process. This Special Issue provides a forum for publishing papers that advance our understanding of the wetting mechanism and wetting prevention in membrane distillation in a variety of applications. Publications are expected to cover the broad aspects of the science and technology of wetting dynamics, in-process wetting prevention and reversal in water, environment, energy, and food industry applications. The articles in this issue aim to illustrate some of the current developments in the field.

Prof. Dr. Wolfgang M. Samhaber
Dr. Mohammad Rezaei
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 Distillation 
  • Wetting phenomenon 
  • In-process wetting prevention

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

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

Published Papers (2 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

21 pages, 7191 KiB  
Article
Long-Running Comparison of Feed-Water Scaling in Membrane Distillation
by Mohammad Rezaei, Albraa Alsaati, David M. Warsinger, Florian Hell and Wolfgang M. Samhaber
Membranes 2020, 10(8), 173; https://doi.org/10.3390/membranes10080173 - 31 Jul 2020
Cited by 16 | Viewed by 4857
Abstract
Membrane distillation (MD) has shown promise for concentrating a wide variety of brines, but the knowledge is limited on how different brines impact salt scaling, flux decline, and subsequent wetting. Furthermore, past studies have lacked critical details and analysis to enable a physical [...] Read more.
Membrane distillation (MD) has shown promise for concentrating a wide variety of brines, but the knowledge is limited on how different brines impact salt scaling, flux decline, and subsequent wetting. Furthermore, past studies have lacked critical details and analysis to enable a physical understanding, including the length of experiments, the inclusion of salt kinetics, impact of antiscalants, and variability between feed-water types. To address this gap, we examined the system performance, water recovery, scale formation, and saturation index of a lab-scale vacuum membrane distillation (VMD) in long-running test runs approaching 200 h. The tests provided a comparison of a variety of relevant feed solutions, including a synthetic seawater reverse osmosis brine with a salinity of 8.0 g/L, tap water, and NaCl, and included an antiscalant. Saturation modeling indicated that calcite and aragonite were the main foulants contributing to permeate flux reduction. The longer operation times than typical studies revealed several insights. First, scaling could reduce permeate flux dramatically, seen here as 49% for the synthetic brine, when reaching a high recovery ratio of 91%. Second, salt crystallization on the membrane surface could have a long-delayed but subsequently significant impact, as the permeate flux experienced a precipitous decline only after 72 h of continuous operation. Several scaling-resistant impacts were observed as well. Although use of an antiscalant did not reduce the decrease in flux, it extended membrane operational time before surface foulants caused membrane wetting. Additionally, numerous calcium, magnesium, and carbonate salts, as well as silica, reached very high saturation indices (>1). Despite this, scaling without wetting was often observed, and scaling was consistently reversible and easily washed. Under heavy scaling conditions, many areas lacked deposits, which enabled continued operation; existing MD performance models lack this effect by assuming uniform layers. This work implies that longer times are needed for MD fouling experiments, and provides further scaling-resistant evidence for MD. Full article
(This article belongs to the Special Issue In Process Wetting Prevention in Membrane Distillation)
►▼ Show Figures

Figure 1

24 pages, 9739 KiB  
Article
Mitigation of Membrane Wetting by Applying a Low Temperature Membrane Distillation
by Marek Gryta
Membranes 2020, 10(7), 158; https://doi.org/10.3390/membranes10070158 - 21 Jul 2020
Cited by 15 | Viewed by 2938
Abstract
The formation of deposits on the membrane surface during membrane distillation is considered as one of the main reasons for membrane wetting. To assess the intensity of this phenomenon, long-term studies were performed comparing the membrane wettability with non-fouling feed (NaCl solutions) and [...] Read more.
The formation of deposits on the membrane surface during membrane distillation is considered as one of the main reasons for membrane wetting. To assess the intensity of this phenomenon, long-term studies were performed comparing the membrane wettability with non-fouling feed (NaCl solutions) and feeds containing various foulants (lake and Baltic Sea water). The polypropylene membranes used were non-wetted by NaCl solutions during several hundred hours of water desalination. However, the occurrence of CaCO3 or other salt crystallization caused the membranes to be partially wetted, especially when periodical membrane cleaning was applied. The scaling intensity was significantly reduced by lowering the feed temperature from 353 to 315 K, which additionally resulted in the limitation of the degree of membrane wetting. Full article
(This article belongs to the Special Issue In Process Wetting Prevention in Membrane Distillation)
►▼ Show Figures

Graphical abstract

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-2
Back to TopTop