Role of inorganic foulants in the aging and deterioration of low-pressure membranes during the chemical cleaning process in surface water treatment: A review

Khan, Imtiaz Afzal; Kim, Jong-Oh

doi:10.1016/j.chemosphere.2023.140073

Cited by 8 publications

(1 citation statement)

References 259 publications

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“…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). In recent years, many new membrane cleaning methods have been developed, such as external electric field assisted cleaning, H 2 O 2 -MnO 2 system , and nano-microbubble enhanced cleaning.…”

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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