Intermittent ultrasound‐assisted ceramic membrane fouling control in ultrafiltration

Lee, Kyu Min; Doan, Huu; Ein‐Mozaffari, Farhad

doi:10.1002/cjce.23777

Cited by 15 publications

(13 citation statements)

References 56 publications

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“…Low frequencies, higher power intensities, intermittent sonication, lower viscosities, lower temperatures and higher pressures are the most important factors to improve the membrane blocking prevention and flux [ 50 ]. The integration of an ultrasound emitter in a unit with a skim milk ultrafiltration membrane allowed a significant increase in the amount of permeate, even for intermittent operation in cycles of sonication [ 51 ]. Two sources of ultrasonic radiation, ultrasonic baths and ultrasonic probes, are commercially available to provide different frequencies and powers in ultrasound.…”

Section: Cavity-based Extraction From Dairy Productsmentioning

confidence: 99%

Cavitation-Effect-Based Treatments and Extractions for Superior Fruit and Milk Valorisation

et al. 2023

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Ultrasound generates cavities in liquids with high-energy behaviour due to large pressure variations, leading to (bio)chemical effects and material modification. Numerous cavity-based treatments in food processes have been reported, but the transition from research to industrial applications is hampered by specific engineering factors, such as the combination of several ultrasound sources, more powerful wave generators or tank geometry. The challenges and development of cavity-based treatments developed for the food industry are reviewed with examples limited to two representative raw materials (fruit and milk) with significantly different properties. Both active compound extraction and food processing techniques based on ultrasound are taken into consideration.

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Section: Cavity-based Extraction From Dairy Productsmentioning

confidence: 99%

Cavitation-Effect-Based Treatments and Extractions for Superior Fruit and Milk Valorisation

et al. 2023

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“…In the rarefaction phase, the instantaneous local pressure in the liquid becomes negative when the amplitude of the acoustic pressure is greater than the ambient pressure: In this way, a force is generated to expand the liquid, and many bubbles undergo these changes expanding them later, collapsing violently in the compression phase and generating shock waves in the liquid. The phenomenon of expansion and violent collapse of bubbles is known as acoustic cavitation (Lee et al, 2020;Yasui et al, 2018). Several reactors have been used for US membrane cleaning.…”

Section: Us Technologymentioning

confidence: 99%

Alternative methods for cleaning membranes in water and wastewater treatment

Hilares

Singh²,

Meza

et al. 2022

Water Environment Research

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Membrane fouling is caused by foulant deposition or adsorption through physical or chemical interactions on the membrane surface, causing the reduction of flux through the membrane. The main drawbacks of chemical agents used for cleaning are cost, damage caused on the membrane, and waste stream making the process unattractive. Alternative, methods such as ultrasound, enzymatic process, and osmotic backwashing were explored for membrane cleaning. Among all mentioned methods, micronanobubbles have been reported as a promising and emergent method for membrane surface cleaning; unfortunately, the information is limited, but preliminary studies have shown it as an efficient, cheap, and environmentally friendly technique. Other methods like electrically and vibratory‐enhanced membrane cleaning also could be interesting but currently are unexplored and information is limited. Practitioner Points Chemical cleaning is an efficient option; however, from an environmental point of view, it is not attractive, and high concentrations could cause damage to the membrane. Micronanobubbles are an emergent and suitable technology for membrane and surface cleaning. Membrane modification and functionalization avoid membrane fast fouling, and the cleaning process is easier, but the manufacture cost could be expensive.

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“…The hydrodynamic force that leads to the creation of bubbles and cavitation with both the drag force and the lifting force and it ends to decreasing in the compression of the concentration polarization layer. Also, the ultrasonic process is also effective in improving the flux by creating hydroxyl free radicals and its interaction with organic blockages on the surface or membrane cavities (Lee et al 2020;Shahraki et al 2014;Eliseus and Bilad 2017;Fouladitajar et al 2013). Two important factors affecting the reduction of membrane fouling during the bubbling and ultrasonic processes are the size of the bubble and its distribution in the membrane modulus (Radaei et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Investigating the potential of bubbling and ultrasonic processes in reducing the fouling of the ultrafiltration membrane during the purification of raw sugar beet syrup

Soleymani,

Hakimzadeh,

Noghabi

et al. 2024

Preprint

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Effective removal of impurities and appropriate decolorization in raw or thin beet juice are considered as important processes to obtain premium sugar industrially. Environmentally friendly processes, such as membrane processes, have the potential to replace some old processes in the sugar industry completely or partially. However, membrane fouling and flux reduction are important challenges facing this process. One of the methods to reduce fouling and improve the flux is bubble generation or cavitation in the inlet flow to create a turbulent flow and as a result reduce the concentration polarization. In this research, the injection of nitrogen gas along with ultrasound was used in the raw beet syrup inlet stream during its purification by ultrafiltration to investigate the efficiency of the membrane such as the improvement of the permeate flux, fouling, membrane resistance and the refining properties of the filtrated syrup. During the bubbling, by increasing the amount of nitrogen gas from 0.5 to 1.5 Lit/min, the permeate flux improved and the overall membrane fouling decreased. This reduction was more evident in the continuous gasification than in the interrupted method. Also, the results showed that the continuous gasification caused a slight disturbance in the purification properties such as purity, color and turbidity due to the improvement of the permeate flux. Furthermore, the results showed that the application of the ultrasonic process in the pulse form simultaneously with the gassing process could put the flux in a higher and more stable state than the gassing state alone during the ultrafiltration process.

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Intermittent ultrasound‐assisted ceramic membrane fouling control in ultrafiltration

Cited by 15 publications

References 56 publications

Cavitation-Effect-Based Treatments and Extractions for Superior Fruit and Milk Valorisation

Cavitation-Effect-Based Treatments and Extractions for Superior Fruit and Milk Valorisation

Alternative methods for cleaning membranes in water and wastewater treatment

Investigating the potential of bubbling and ultrasonic processes in reducing the fouling of the ultrafiltration membrane during the purification of raw sugar beet syrup

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