Showing papers on "Fouling published in 2022"
TL;DR: This review provides a comprehensive summary of the effects of substrate pore structure and chemistry on the water permeance, selectivity, and fouling performance of the resulting TFC membranes.
133 citations
TL;DR: In this article , a comprehensive review of the effects of substrate pore structure and chemistry on the water permeance, selectivity, and fouling performance of the resulting TFC membranes is presented.
112 citations
TL;DR: In this article, a polyvinylidene fluoride (PVDF)-Ni-Co membrane was fabricated via an in-situ reduction method, which exhibited conductive property, magnetic property and special in-Situ micro-aeration function under assistance of electric field.
98 citations
TL;DR: In this article , a polyvinylidene fluoride (PVDF)-Ni-Co membrane was fabricated via an in-situ reduction method, which exhibited conductive property, magnetic property and special in-Situ micro-aeration function under assistance of electric field.
85 citations
TL;DR: In this paper , a double-defense design by integrating hydrophilic polymer brushes and hydrogel layer on oil/water separation membranes for desired anti-oil-fouling property is presented.
Abstract: Oil fouling threatens the water flux stability of membranes for oil/water separation. Simple hydrophilic modification fights for an opportunity to prevent oil contamination but fails to eliminate severe water flux decline. In essence, a “single‐defense” mechanism is insufficient to build a potent barrier against accumulated cake layer under a filtration environment. This work reports a “double‐defense” design by integrating hydrophilic polymer brushes and hydrogel layer on oil/water separation membranes for desired anti‐oil‐fouling property, where a poly(vinylidene fluoride) porous membrane is first covered by a layer of poly(hydroxyethyl methylacrylate) hydrogel and then controllably grafted with poly(sulfobetaine) brushes. The spatially hierarchical structure establishes a highly covered “double‐defense” barrier for the membrane surface to efficiently repel oil adhesion and the formation of an accumulated cake layer. When separating various surfactant‐stabilized oil‐in‐water emulsions, the permeating flux displays a nearly zero decline throughout the whole filtration period. Most importantly, the permeating flux of the membrane is almost the same when filtrating pure water and filtrating oil‐in‐water emulsions, which is difficult to be achieved by the general membranes, indicating that the membrane has excellent anti‐oil‐fouling property superior to the currently reported membranes.
75 citations
75 citations
TL;DR: In this paper , a new mineral-hydrogel coating with nanostructures was designed to modify hydrophobic polyvinylidene fluoride (PVDF) microfiltration membranes by an alternate quaternary soaking strategy.
72 citations
TL;DR: In this paper , an iron-carbon micro-electrolysis (ICME)/electro-biocarriers-MBR system was established to explore the performance of pollutant removal and anti-fouling for an actual livestock wastewater.
65 citations
TL;DR: In this paper , the authors investigated the competing mechanisms of water transport in the transverse direction vs that in the normal direction, and demonstrated reduced membrane fouling and improved fouling reversibility for a thin-film nanocomposite (TFNi) membrane over its control without an interlayer.
Abstract: Interlayered thin-film nanocomposite (TFNi) membranes have been shown to achieve enhanced water permeance as a result of the gutter effect. Nevertheless, some studies report impaired separation performance after the inclusion of an interlayer. In this study, we resolve the competing mechanisms of water transport in the transverse direction vs that in the normal direction. To enable easy comparison, carbon nanotube (CNT)-incorporated TFNi membranes with an identical polyamide rejection layer but different interlayer thicknesses were investigated. While increasing the thickness of the CNT interlayer facilitates water transport in the transverse direction (therefore improving the gutter effect), it simultaneously increases its hydraulic resistance in the normal direction. An optimal water permeance of 13.0 ± 0.7 L m-2 h-1 bar-1, which was more than doubled over the control membrane of 6.1 ± 0.7 L m-2 h-1 bar-1, was realized at a moderate interlayer thickness, resulting from the trade-off between these two competing mechanisms. In this study, we demonstrate reduced membrane fouling and improved fouling reversibility for a TFNi membrane over its control without an interlayer, which can be attributed to its more uniform water flux distribution. The fundamental mechanisms revealed in this study lay a solid foundation for the future development of TFNi membranes toward enhanced separation properties and antifouling ability.
54 citations
TL;DR: In this article , the application of modified nanocellulose for heavy metal removal, oily water separation and dye extractions are surveyed, since they are potentially useful as adsorbents in the filtration membrane to enhance its performance.
54 citations
TL;DR: More robust ceramic membranes with tailorable structures and functions are increasingly employed for water treatment, particularly in some harsh applications for their ultra-long service lifespan due to their high mechanical, structural, chemical and thermal stability and anti-fouling properties as mentioned in this paper .
TL;DR: In this paper, a review summarizes the operative principle of MDCs, the most common MDC cells configurations, and describes the variables that influence their performance in light of full-scale applications.
TL;DR: In this article , a review summarizes the operative principle of MDCs, the most common MDC cells configurations, and describes the variables that influence their performance in light of full-scale applications.
TL;DR: In this article , a super-hydrophobic TPU/[email protected]2 composite coating was proposed, which has excellent self-cleaning and anti-fouling properties and expected to have great potentials in various industrial fields.
TL;DR: In this paper , the authors present a state-of-the-art review on the advances in AI algorithms (e.g., artificial neural networks, fuzzy logic, genetic programming, support vector machines and search algorithms) for prediction of membrane fouling.
TL;DR: In this paper , the authors highlight the current progression of membrane used for oil-water separation started from membrane materials perspectives, followed by the discussion on fouling and fouling mitigation during oilwater separation.
Abstract: Oil–in–water emulsion separation is a challenging separation process in industries due to the large volumes of emulsified oil produced. Membrane technology has become more important in emulsified oil treatment due to its high separation efficiency and straightforward operational procedure. Up to now, microfiltration and ultrafiltration are the most utilized membrane processes for oil-in-water emulsion separation. However, the membrane for emulsified oil deals with several problems. The presence of flexible oil droplets creates a fouling tendency as well as a reduction in the overall rejection of the membrane. These phenomena have attracted researchers to develop antifouling strategies for membranes, including membrane materials engineering and membrane operational management. This review highlights the current progression of membrane used for oil-water separation started from membrane materials perspectives, followed by the discussion on fouling and fouling mitigation during oil-water separation. The review is concluded by future perspectives of membrane technology for oil-water separation.
TL;DR: In this paper , the performance and the membrane fouling features of an electrode ultrafiltration membrane bioreactor (EMBR) fed with cosmetics wastewater were compared with a conventional ultra-filtering membrane biOREactor (UMBR), and the results showed the COD removal efficiency increased by 4.43%.
Abstract: The membrane fouling problem of the membrane bioreactor (MBR) for wastewater treatment reduces the membrane flux and the pollutants removal efficiencies, which is the major obstacle limiting its application and should be properly solved. The combination of membrane and electricity can effectively slow down the membrane fouling rate due to electric repulsion between the pollutants and the membrane. In this study, the performance and the membrane fouling features of an electrode ultrafiltration membrane bioreactor (EMBR) fed with cosmetics wastewater were compared with a conventional ultrafiltration membrane bioreactor (UMBR). The results showed the COD removal efficiency increased by 4.43% and the transmembrane pressure (TMP) reduced by 50% in the EMBR as compared with the UMBR. The specific surface areas of electrode ultrafiltration membrane and conventional ultrafiltration membrane declined by 56.9% and 78.8% after 90 days of operation, respectively. The Protein (PN), polysaccharide (PS) and humic acids (HA) in the cake layer of EMBR were only 61.27%, 78.37% and 34.85% of that of UMBR, which contributed to its loose and porous structure and thus decreased the growth rate of TMP and extended the operation cycle. Extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory calculation proved that the energy barrier between the electrode ultrafiltration membrane and the pollutants was 50% higher than that between the conventional ultrafiltration membrane and the pollutants. Therefore, the strong anti-fouling property of the electrode ultrafiltration membrane could reduce the chemicals dosage and manpower consumption for membrane cleaning and could be preferred for the treatment of cosmetics or alike wastewater containing high concentrations of surfactants and fatty acids.
TL;DR: In this paper, the authors provide a concise and yet comprehensive review of the membrane processes used to desalt saline water, and the successes and failures of each process are critically reviewed, while capital expenditure and OPEX of these water desalination processes are reviewed and compared.
TL;DR: In this article , the authors provide a concise and yet comprehensive review of the membrane processes used to desalt saline water, and the successes and failures of each process are critically reviewed, while the CAPEX and OPEX of these water desalination processes are reviewed and compared.
TL;DR: In this article , the authors revealed fundamental mechanisms of membrane fouling caused by TEP, greatly deepening understanding of TEP fouling, and facilitating to development of effective fouling control strategies.
TL;DR: In this paper , a simple method to fabricate Zeolitic Imidazolate Framework-8/Graphene oxide/Polyacrylonitrile (ZIF-8,GO/PAN) nanofibrous membranes and their multifunctional treatment capacity for complex wastewater was reported.
TL;DR: In this article , the authors explored the thermodynamic fouling mechanisms of polysaccharides with different structure and found that branch structure correspond to higher chemical potential change during gel layer formation, and higher ability to carry bound water.
TL;DR: In this article , a multifunctional super-hydrophobic surface using eco-friendly materials: polydimethylsiloxane (PDMS) and carnauba wax was presented.
TL;DR: In this paper , the role of EDTA in TEP-associated membrane fouling was investigated, and it was found that TEP had rather high specific filtration resistance (SFR) of 2.49 × 1015 m−1·kg−1.
TL;DR: In this paper, the authors investigated the filtration and separation performance of ultrafiltration during the treatment of algae-laden water in the presence of anionic surfactants (the most widely used surfactant type).
TL;DR: In this paper , a review of the development of polymer-based nanofiltration membranes processes for wastewater treatment, desalination, biotechnological and pharmaceutical applications is presented.
Abstract: Currently, nanofiltration (NF) membranes are playing a vital role in various applications. However, several challenges remain in their applications such as difficulty in controlling membrane pore size and controlling membrane fouling. Polymeric membranes are the best option to achieve a high-performance membrane having longer durability. Several membranes are available for water treatment, but making a suitable membrane process at a low cost with low energy consumption is one of the major challenges. This review article discussed the development of polymer-based nanofiltration membranes processes for wastewater treatment, desalination, biotechnological and pharmaceutical applications. This review paper considers the background of the development of the improved performance of nanofiltration membranes for various applications with or without nanoparticles. While writing this review paper the effort has been given to accrue recent years’ works of literature to demonstrate huge promise for enhancing the transport and fouling activities of NF membranes. The focus is also given to the transport models of nanofiltration membranes. Various methods for the development of NF membranes along with challenges and research opportunities have been discussed. The NF membrane fouling and preventive measures to mitigate fouling have been discussed in this review article. Furthermore, a brief investigation of NF membranes for industrial development along with future perspectives can be made in NF membrane processes are discussed.
TL;DR: A comprehensive overview of nanofiber membranes' fabrication and function in water purification applications as well as providing novel approaches to overcome/alleviating the mentioned disadvantages is presented in this article.
TL;DR: In this article , the authors investigated the filtration and separation performance of ultrafiltration during the treatment of algae-laden water in the presence of anionic surfactants (the most widely used surfactant type).
TL;DR: In this article , the authors provide an overview of recent studies on the application of super-hydrophobic coatings and surfaces for food packaging applications, with a focus on studies aimed at reducing residual food waste via superhydrophilic coatings prepared from edible, nontoxic, and ecofriendly materials.
TL;DR: In this paper, a simple and straightforward membrane modification methodology utilizing the reactive nature of polydopamine to molecularly graft short chain amino alkanes followed by zwitterionization using 1,3-propanesultone.