Periodic electrolysis technique for  in situ  fouling control and removal with low-pressure membrane filtration

Abid, Hadeel Subhi; Johnson, Daniel J.; Clifford, Ben; Gethin, D. T.; Bertoncello, Paolo; Hashaikeh, Raed; Hilal, Nidal

doi:10.1016/j.desal.2018.01.019

Cited by 17 publications

(8 citation statements)

References 64 publications

(76 reference statements)

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“…In this case, flat plate electrodes with large pore sizes may be used as the active layer. A mesh electrode can be pasted onto the membrane substrate or assembled into an electrofiltration module with a membrane. ,,, We note that the current efficiency of such EMs containing conductive layers with large pore sizes is much lower than that of EMs prepared by the other two methods, although their specific surface areas can be comparable, as discussed later.…”

Section: Preparation and Operation Modes Of Electrified Membranesmentioning

confidence: 87%

Electrified Membranes for Water Treatment Applications

et al. 2021

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Electrified membranes (EMs) have the potential to address inherent limitations of conventional membrane technologies. Recent studies have demonstrated that EMs exhibit enhanced functions beyond separation. Electrification could enhance the performance and sustainability of membrane technologies and stimulate new applications in water and wastewater treatment. Herein, we first describe EM materials, synthesis methods, electrofiltration modules, and operating modes. Next, we highlight applications of EMs in water decontamination, purification, and disinfection. Additionally, we discuss state-of-the-art electrification methods for controlling membrane organic fouling, biofouling, and inorganic scaling. We also evaluate the energy consumption of EMs for water treatment and fouling control. We conclude by discussing the challenges for improving the stability and practicality of EMs and by proposing pathways for future research and development. On the basis of our discussion, we suggest that EMs may be viable for ultrafiltration and microfiltration but not for salt-rejecting reverse osmosis and nanofiltration applications. Further, we find that EMs are promising for decontamination and organic fouling control, and these systems could be deployed for fit-for-purpose distributed treatment applications.

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Section: Preparation and Operation Modes Of Electrified Membranesmentioning

confidence: 87%

Electrified Membranes for Water Treatment Applications

et al. 2021

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“…However, membrane fouling is a key challenge when performing electromigration for selective separation of the components. Periodic reverse polarization has been proposed to diminish fouling, 99 yet the necessity of robust or expensive electrodes should be implemented to avoid their deterioration when shifting the potentials. Moreover, it also must consider the usage of external reagents (e.g., such as acids, 1 M HCl) to remove precipitations in the electrodes and organic fouling during long-term operations.…”

Section: Electrochemical Inorganics and Organics Separation: State Of...mentioning

confidence: 99%

Review—Electrochemical Separation of Organic and Inorganic Contaminants in Wastewater

Gao

Mosquera-Romero

Ntagia

et al. 2022

J. Electrochem. Soc.

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High energy input and chemical additions are typically needed to deal with persistent pollutants, organic and inorganic, and organometallic complexes in wastewater. Particularly, organometallic complexes decrease the removal efficiency for other pollutants being treated with conventional technologies, which can lead to high operational costs and residues formation. The improperly treated wastewater contains nutrients (nitrogen and phosphorus), heavy metals, and persistent organics, which should be removed or recovered before discharging. Electrochemical technologies can achieve concomitant removal of persistent pollutants and resource recovery from wastewater, with the benefits of low chemical input, cost-effectiveness and reduced water consumption. Here, we provide an overview of electrochemical technologies for the separation of organics and inorganics and their subsequent recovery. The focus is placed into electrodeposition, electrodialysis, membrane electrolysis, electrochemical oxidation, capacitive deionization, and bioelectrochemical systems. The main challenges considered at present are i) the cost and longevity of the materials, ii) the process efficiency and selectivity and iii) the complexity of the wastewater matrices. In this review it is projected that in the near future, the electrochemical separation and recovery of organics and inorganics will be preferred, as electrochemical cells powered by renewable energy can serve for decentralized and off-grid treatment approaches.

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“…Liu et al fabricated a conductive membrane embedded with reduced graphene oxide (rGO) to electrocatalytically generate hydrogen peroxide (H 2 O 2 ) for removal of foulant layer from the membrane surface [32]. According to some studies, the products of electrolysis may also damage the membrane if not carefully controlled [73][74][75].…”

Section: Electrolysismentioning

confidence: 99%

“…DC field is the simplest and most straight-forward setup in electrofiltration. However, it has the potential to damage the membrane due to electrolysis [73][74][75]. In membrane bioreactors, direct current has been reported to damage microbial communities as well [34].…”

Section: Electric Field Modementioning

confidence: 99%

A Critical Review on Electric Field-Assisted Membrane Processes: Implications for Fouling Control, Water Recovery, and Future Prospects

Shen¹,

Badireddy²

2021

Membranes

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Electrofiltration, an electric field-assisted membrane process, has been a research topic of growing popularity due to its ability to improve membrane performance by providing in situ antifouling conditions in a membrane system. The number of reports on electrofiltration have increased exponentially over the past two decades. These reports explored many innovations, such as novel configurations of an electric field, engineered membrane materials, and interesting designs of foulant compositions and membrane modules. Recent electrofiltration literature focused mainly on compiling results without a comprehensive comparative analysis across different works. The main objective of this critical review is to, first, organize, compare and contrast the results across various electrofiltration studies; second, discuss various types of mechanisms that could be incorporated into electrofiltration and their effect on membrane system performance; third, characterize electrofiltration phenomenon; fourth, interpret the effects of various operational conditions on the performance of electrofiltration; fifth, evaluate the state-of-the-art knowledge associated with modeling efforts in electrofiltration; sixth, discuss the energy costs related to the implementation of electrofiltration; and finally, identify the current knowledge gaps that hinder the transition of the lab-scale observations to industry-scale electrofiltration as well as the future prospects of electrofiltration.

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Periodic electrolysis technique for in situ fouling control and removal with low-pressure membrane filtration

Cited by 17 publications

References 64 publications

Electrified Membranes for Water Treatment Applications

Electrified Membranes for Water Treatment Applications

Review—Electrochemical Separation of Organic and Inorganic Contaminants in Wastewater

A Critical Review on Electric Field-Assisted Membrane Processes: Implications for Fouling Control, Water Recovery, and Future Prospects

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