The potential of hybrid electrocoagulation-membrane separation processes for performance enhancement and membrane fouling mitigation: A review

Moneer, Abeer A.

doi:10.1016/j.ejar.2023.08.007

Cited by 5 publications

(2 citation statements)

References 111 publications

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“…Alkalis, such as NaOH, act by increasing the pH of the solution, which enhances the negative charge density of organic foulant compounds accumulated on the membrane surface through deprotonation of carboxylic groups, among other mechanisms, thereby increasing their solubility. On the other hand, acid cleaning dissolves inorganic scales such as calcium sulfate and carbonate (Moneer, 2023). It is well known that acids, such as the commonly used citric acid, are essential for restoring membrane performance impaired by the accumulation of inorganic foulants on the membrane surface or in pores.…”

Section: Evaluation Of Direct Processes and Combined Couplings By Ret...mentioning

confidence: 99%

Hybrid electrochemical/membrane couplings processes for enhancing seawater pretreatment and desalination

Aouni,

Tounakti,

Ahmed

et al. 2024

Water Environment Research

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This research focuses on boosting seawater pretreatment and desalination through electrocoagulation (EC)/ultrafiltration (UF) and electrocoagulation (EC)/nanofiltration (NF) processes. We first optimized the key parameters of the EC process using aluminum (Al) and iron (Fe) electrodes. Experimental results show EC process is efficient under optimal conditions. Second, membrane filtration using UF (ES10B), NF(UTC60) and NF(200) as post‐processing steps to the EC process were experimented with. EC(Al)/NF(UTC60) combination resulted in the highest removal rate of organic matter (COD 98%, TOC 95%, fluorescence [humic and fulvic acids] 68%), optical density (OD600nm 75%, turbidity 70%, conductivity 64%). In terms of major ions removal, up to 55% was achieved as NF decreases conductivity, salinity, and hardness. EC(Al)/NF(UTC60) seawater permeate demonstrated the best results in terms of lowest flux decline (J/Jo = 0.9) and fouling, which was realized by resistance in series and recovery factor rate (%). Additionally, NF(UTC60) fouling reversibility led to a longer lifetime and higher recovery factor (93%).Practitioner Points Pretreatment by hybrid processes was experimented with to enhance the saline water treatment. Organic matter (COD 98%, TOC 95%, fluorescence [humic and fulvic acids] 68%) and turbidity were successfully removed. Salinity and hardness (conductivity 64%) were highly reduced by NF. Flux decline, retention rate, and membrane fouling were studied.

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Section: Evaluation Of Direct Processes and Combined Couplings By Ret...mentioning

confidence: 99%

Hybrid electrochemical/membrane couplings processes for enhancing seawater pretreatment and desalination

Aouni,

Tounakti,

Ahmed

et al. 2024

Water Environment Research

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“…The MBRs using ceramic membranes as membrane modules provide excellent effluent quality, limited foot‐print, and low wasted sludge production (Bagheri & Mirbagheri, 2018) compared with conventional activated sludge processes (Cha et al, 2020; Jeong et al, 2018). However, the major weakness remains in membrane fouling (Asif & Zhang, 2021), resulting in high operational cost and frequent membrane replacement (Moneer, 2023; Nabi et al, 2023; Osman & Hodaifa, 2023; Sanchez et al, 2023). The common cleaning methods of ceramic membranes include membrane modification, hydraulic backwashing, and chemical reagent cleaning (Chapalaghi et al, 2022; Khan & Kim, 2023; Ninomiya et al, 2020; Sakamoto et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Study on efficiency and mechanism of ultrasonic controlling membrane fouling in ceramic membrane bioreactors

Ren,

Zhang,

Liu

et al. 2024

Water Environment Research

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In recent years, ceramic membranes have been increasingly used in membrane bioreactors (MBRs). However, membrane fouling was still the core issue restricting the large‐scale engineering application of ceramic MBRs. As a novel and alternative technology, ultrasonic could be used to control membrane fouling. This research focused on the efficiency and mechanism of ultrasonic controlling membrane fouling in ceramic MBRs. The results showed that ultrasonic reduced the sludge concentration in MBR, and the average particle size of sludge was always in a high range. The sludge activity of the system was stable at 6–9 (mg O2·(g MLSS·h)−1), indicating that ultrasonic did not destroy the activity of microorganisms in the system. The extracellular polymer substance (EPS) of the ultrasonic group was slightly higher than that of the control group, while the soluble microbial product (SMP) content was relatively stable. The ceramic membrane of the ultrasonic group has a partial retention effect on the organic components. The application of ultrasonic slowed down the decrease of the hydrophilicity of the ceramic membrane. The main pollutants on the membrane surface exist in the form of aromatic and heteroaromatic rings, alkynes, and so forth. Ultrasonic removes the amide substances from the membrane surface. Membrane fouling resistance is mainly due to membrane pore blockage, accounting for 75.53%.Practitioner Points Enrich the research on the mechanism of ultrasonic technology in membrane fouling control. The MBR can still operate normally with ultrasonic applied. The time for the ceramic membrane to reach the fouling end point is 2.4 times that without ultrasonic. The main cause of membrane fouling was pore blocking, accounting for 75.53%.

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Revisited Coagulation-Flocculation-Nanofiltration for Dye Removal

Ibrahim,

Jumadil,

Roger

et al. 2024

Environmental Science and Engineering

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The potential of hybrid electrocoagulation-membrane separation processes for performance enhancement and membrane fouling mitigation: A review

Cited by 5 publications

References 111 publications

Hybrid electrochemical/membrane couplings processes for enhancing seawater pretreatment and desalination

Hybrid electrochemical/membrane couplings processes for enhancing seawater pretreatment and desalination

Study on efficiency and mechanism of ultrasonic controlling membrane fouling in ceramic membrane bioreactors

Revisited Coagulation-Flocculation-Nanofiltration for Dye Removal

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