Biofilm removal efficacy using direct electric current in cross-flow ultrafiltration processes for water treatment

Kerdi, Sarah; Qamar, Adnan; Vrouwenvelder, Johannes S.; Ghaffour, Noreddine

doi:10.1016/j.memsci.2020.118808

Cited by 9 publications

(2 citation statements)

References 71 publications

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“…Previous studies primarily focused on investigating the impact of direct current application on controlling biofilm overgrowth during water and wastewater treatment processes, which unavoidably resulted in undesirable electrochemical reactions [2,[47][48][49]. Unlike the application of a direct current, the application of a high-frequency alternating electric field circumvents any potential electrochemical reactions [39,43].…”

Section: Discussionmentioning

confidence: 99%

Influence of High-Frequency, Low-Voltage Alternating Electric Fields on Biofilm Development Processes of Escherichia coli and Pseudomonas aeruginosa

Kunlasubpreedee,

Tobino,

Nakajima

2023

Water

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A non-chemical solution is needed to control biofilms in water and wastewater treatment systems. High-frequency alternating electric field application offers an alternative approach that does not involve undesired electrode surface reactions. However, the effect of high-frequency alternating electric fields on bacterial cells in the attached-growth mode remains unexplored. This study investigated the impact of such fields on two stages of the biofilm development process: the initial adhesion phase (stage 1) and the early development phase (stage 2). Experiments were conducted using Escherichia coli and Pseudomonas aeruginosa in a three-channel flow cell exposed to alternating electric fields (3.05 V/cm, 20 MHz). The primary outcome of this study demonstrated that alternating electric fields decreased adhered cell numbers at both stages due to their inhibitory effect on growth. The alternating electric fields also triggered cell detachment after the initial attachment stage but not in mature biofilms. Interestingly, despite a reduction in cell counts, the amount of total biofilm biomass remained unaffected, which was likely due to increased cell size via cell elongation compensating for the decrease in numbers. No synergistic effects with respect to hydrodynamic forces were observed. These findings highlight the potential applicability of alternating electric fields to biofilm control and provide implications for water and wastewater engineering applications.

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Section: Discussionmentioning

confidence: 99%

Influence of High-Frequency, Low-Voltage Alternating Electric Fields on Biofilm Development Processes of Escherichia coli and Pseudomonas aeruginosa

Kunlasubpreedee,

Tobino,

Nakajima

2023

Water

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“…Aeration 11–13 and crossflow 14–16 are the most commonly used membrane cleaning methods in the current membrane process, and their optimization is ongoing. They mainly reduce the concentration polarization by controlling the shear force of the membrane surface 17,18 and reducing solid particle deposition 19,20 to mitigate membrane fouling, whose essence is to influence particle migrations on the membrane surface and then affect the membrane fouling in the membrane system.…”

Section: Introductionmentioning

confidence: 99%

Assessment of hydraulic performance and fouling control caused by pulse flow in hollow fiber membrane module

et al. 2022

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To shed light on the effect of pulse flow on shear force and membrane fouling, the pulse frequency and flow velocity based on fiber Bragg grating (FBG) sensing technology were studied. The results show that there is a threshold for this synergy between the pulse frequency and flow velocity, which forms more easily at a high pulse frequency and low flow velocity. Moreover, the transition from pulse flow to continuous flow affects the shear force distribution with the membrane module height. Besides, at the same volumetric flow, Re gradually reaches a plateau as the pulse frequency increases from 1 to 5 Hz, and the membrane fouling control has a better flux recovery, which can reach a maximum of 28.89%. Finally, the results also show that the combined effect of high pulse frequency and low flow velocity would be higher than that of low pulse frequency and high flow velocity.

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The evolution of feed spacer role in membrane applications for desalination and water treatment: A critical review and future perspective

et al. 2023

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Biofilm removal efficacy using direct electric current in cross-flow ultrafiltration processes for water treatment

Cited by 9 publications

References 71 publications

Influence of High-Frequency, Low-Voltage Alternating Electric Fields on Biofilm Development Processes of Escherichia coli and Pseudomonas aeruginosa

Influence of High-Frequency, Low-Voltage Alternating Electric Fields on Biofilm Development Processes of Escherichia coli and Pseudomonas aeruginosa

Assessment of hydraulic performance and fouling control caused by pulse flow in hollow fiber membrane module

The evolution of feed spacer role in membrane applications for desalination and water treatment: A critical review and future perspective

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