Influence of Membrane Materials and Operational Modes on the Performance of Ultrafiltration Modules for Drinking Water Treatment

Fan, Gongduan; Su, Zhaoyue; Lin, Rong; Lin, Xiuyong; Xu, Renxin; Chen, Wei

doi:10.1155/2016/6895235

Cited by 10 publications

(4 citation statements)

References 26 publications

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“…UF membranes can be categorized by their material into organic and inorganic membranes. Common commercial UF membranes are made of organic polymer materials such as polyethersulfone (PES), polyvinylidene fluoride (PVDF), polyacrylonitrile (PAN), poly-sulfone (PS) and polyvinyl chloride (PVC) [ 19 ]. In order to be applied to oil–water separation, additional hydrophilic coatings (e.g., catechol/chitosan) are being tested on polymeric membranes (e.g., PVDF) [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Treatment of Hydrothermal-Liquefaction Wastewater with Crossflow UF for Oil and Particle Removal

et al. 2022

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This study aims to evaluate the application of ceramic ultrafiltration membranes in the crossflow mode for the separation of particles and oil in water emulsions (free oil droplets and micelles) from hydrothermal-liquefaction wastewater (HTL-WW) from the hydrothermal liquefaction of municipal sewage sludge. The experiments were carried out using one-channel TiO2 membranes with pore sizes of 30, 10 and 5 nm. The results showed that the highest stable permeability could be achieved with a membrane-pore size of 10 nm, which experienced less fouling, especially through pore blockage, in comparison to the two other pore sizes. Instead of observing an increase in the permeability, the application of a higher feed temperature as well as backwash cycles led to a clear increase in irreversible fouling due to the presence of surfactants in the HTL-WW. Among several physical and chemical cleaning methods, alkaline cleaning at pH 12 proved to be the most efficient in removing fouling and maintaining stable performance on a long-term basis. Ceramic-membrane ultrafiltration can be considered as an adequate first-stage treatment of real HTL wastewater.

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Section: Introductionmentioning

confidence: 99%

Treatment of Hydrothermal-Liquefaction Wastewater with Crossflow UF for Oil and Particle Removal

et al. 2022

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“…As a result, many researchers are focusing thei efforts on creating effective membrane fouling management strategies. Modifying mem brane surface characteristics [33,34], improving operating parameters [35,36], and provid ing feed pre-treatment [37] are the most frequent ways for membrane fouling manage ment.…”

Section: Introductionmentioning

confidence: 99%

Review of New Approaches for Fouling Mitigation in Membrane Separation Processes in Water Treatment Applications

2021

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This review investigates antifouling agents used in the process of membrane separation (MS), in reverse osmosis (RO), ultrafiltration (UF), nanofiltration (NF), microfiltration (MF), membrane distillation (MD), and membrane bioreactors (MBR), and clarifies the fouling mechanism. Membrane fouling is an incomplete substance formed on the membrane surface, which will quickly reduce the permeation flux and damage the membrane. Foulant is colloidal matter: organic matter (humic acid, protein, carbohydrate, nano/microplastics), inorganic matter (clay such as potassium montmorillonite, silica salt, metal oxide, etc.), and biological matter (viruses, bacteria and microorganisms adhering to the surface of the membrane in the case of nutrients) The stability and performance of the tested nanometric membranes, as well as the mitigation of pollution assisted by electricity and the cleaning and repair of membranes, are reported. Physical, chemical, physico-chemical, and biological methods for cleaning membranes. Biologically induced biofilm dispersion effectively controls fouling. Dynamic changes in membrane foulants during long-term operation are critical to the development and implementation of fouling control methods. Membrane fouling control strategies show that improving membrane performance is not only the end goal, but new ideas and new technologies for membrane cleaning and repair need to be explored and developed in order to develop future applications.

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“…From a chemical structure view, sulfone-based polymers are more hydrophilic candidates because they form more hydrogen bonds with water than ketones. 28,29 Oroujzadeh and Mehdipour-Ataei reported that the presence of sulfone groups on a polymeric backbone lowers the general density of the polymer, allowing more solvent interactions in a limited space. 30 In addition, the previously described factors become exacerbated by the action of sulfonic groups, even when low sulfonations are achieved.…”

Section: Oxidative Stabilitymentioning

confidence: 99%

Random sulfonated poly(arylene ether sulfone) and sulfonated poly(arylene ether ketone) membranes for fuel cell applications

Ramos‐Rivera,

Suleiman

2024

J of Applied Polymer Sci

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In this study, sulfonated poly(arylene ether sulfone) (SPAES) and sulfonated poly(arylene ether ketone) (SPAEK) were randomly synthesized, employing a presulfonation process. This presulfonation process resulted in a more controlled and reproducible sulfonation level. The respective polymers were prepared using 2,2‐Bis(4‐hydroxyphenyl) propane at 50% molar ratio, which also provided some membrane elasticity. The resulting polymers, each had 25% of the block containing the sulfonic domains (SPAES A 25 and SPAEK A 25). Better conductive membranes were achieved for the random sulfone polymers than for the random ketone polymers, with values, respectively, of 0.24 and 0.07 S cm−1 at 80°C. The lower proton conductivity from the ketone‐based polymer was compensated with very low methanol permeability (0.25 × 10−6 cm2 s−1) and outstanding oxidative stability. The selectivity of both polymer membranes exceeded the reported values for the state‐of‐the‐art Nafion® 117 and other commercially available options. Both polymer membranes, with their unique combination of ionic domains, elastomeric blocks, and resulting morphology, could be viable candidates for fuel cell applications.

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Influence of Membrane Materials and Operational Modes on the Performance of Ultrafiltration Modules for Drinking Water Treatment

Cited by 10 publications

References 26 publications

Treatment of Hydrothermal-Liquefaction Wastewater with Crossflow UF for Oil and Particle Removal

Treatment of Hydrothermal-Liquefaction Wastewater with Crossflow UF for Oil and Particle Removal

Review of New Approaches for Fouling Mitigation in Membrane Separation Processes in Water Treatment Applications

Random sulfonated poly(arylene ether sulfone) and sulfonated poly(arylene ether ketone) membranes for fuel cell applications

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