Confounding Effect of Wetting, Compaction, and Fouling in an Ultra-Low-Pressure Membrane Filtration: A Review

Hung, Tok Sheng; Bilad, Muhammad Roil; Shamsuddin, Norazanita; Suhaimi, Hazwani; Ismail, Norulhuda; Jaafar, Juhana; Ismail, Ahmad Fauzi

doi:10.3390/polym14102073

Cited by 12 publications

(9 citation statements)

References 78 publications

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“…In the case of transmembrane pressure between 2 and 70 bar, membrane compaction is considered negligible. 60 All these reasons led to set the transmembrane pressure to 4 bar.…”

Section: Resultsmentioning

confidence: 99%

“…In the case of transmembrane pressure between 2 and 70 bar, membrane compaction is considered negligible. 60 All these reasons led to set the transmembrane pressure to 4 bar. In addition to average pore size determination, Table 3 shows contact angle, largest pore size for each membrane and theoretical LEP values calculated from aforementioned parameters.…”

Section: Water Ux Measurementmentioning

confidence: 99%

See 1 more Smart Citation

Pioneering the preparation of porous PIM-1 membranes for enhanced water vapor flow

Caliskan,

Shishatskiy,

Abetz

et al. 2024

RSC Adv.

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“…In the case of transmembrane pressure between 2 and 70 bar, membrane compaction is considered negligible. 60 All these reasons led to set the transmembrane pressure to 4 bar.…”

Section: Resultsmentioning

confidence: 99%

Section: Water Ux Measurementmentioning

confidence: 99%

Pioneering the preparation of porous PIM-1 membranes for enhanced water vapor flow

Caliskan,

Shishatskiy,

Abetz

et al. 2024

RSC Adv.

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show abstract

“…The phenomenon that occurs in trend A indicates compaction. With the occurrence of compaction, the permeability obtained decreases with increasing pressure received by the membrane [21], [25], [27]. At a pressure of 1 kPa the permeability of water reaches 4,090.5 (L/m 2 .hour.bar) while at a pressure of 2 kPa the permeability of water reaches 3.001 (L/m 2 .hour.bar).…”

Section: Ultra-low Pressure Filtration Performance On Campus Domestic...mentioning

confidence: 96%

“…Membrane compaction refers to changes in the physical structure of membrane materials due to transmembrane exposure. Due to the flexible nature of the polymer in the matrix, it affects the hydraulic filtration performance [27]. Compaction can occur because the membrane material is made of polymeric material, which when pressure is applied, the pores will shrink.…”

Section: Fig4 Clean Water Filtrationmentioning

confidence: 99%

Ultra-Low Pressure Filtration Performance in Campus Domestic Waste

Khery,

Cordella Rhamdhani,

Roil Bilad

et al. 2024

E3S Web Conf.

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This study aims to determine the effect of ultra-low pressure filtration performance on the permeability of clean water and campus domestic waste. Waste treatment can be carried out by applying an ultra-low pressure membrane filtration process with a Gravity Driven Membrane (GDM) system. Ultra-low pressure membrane filtration has less impact on the environment, low energy use, easy operation, high efficiency in removing pathogens, organic matter and turbidity. The filtration was tested using clean water and campus domestic waste as bait with a duration of 30 minutes each for each pressure, starting from a pressure of 1 kPa-10 kPa with a total time of 780 minutes for one sample. At each pressure, a relaxation time will be given for 10 minutes, this is done to maintain membrane permeability. Long-term filtration was carried out for 35 days and every 7 days the domestic waste was replaced without backwashing the membrane. The results of this study indicate that the permeability of clean water decreases due to compaction that occurs along with increasing pressure. Meanwhile, the permeability of campus domestic waste has decreased due to compaction accompanied by pore blockage in the membrane (fouling).

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“…Operation flux is an important parameter in MBR designing and operation, and it is a direct factor in polymer film fouling. Hung et al [ 14 ] reviewed recent studies on membrane compaction, wetting and fouling, demonstrating that an ultra-low-pressure membrane (ULPM) is effective for long-term filtration at stable fluxes. It has been suggested that submerged MBRs should be operated at a flux below the “critical flux”, the so-called subcritical flux, to maintain a sustainable permeability and to mitigate polymer film pollution [ 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Determination of Sustainable Critical Flux through a Long-Term Membrane Resistance Model

Fan

Yang

et al. 2023

Polymers

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A long-term membrane resistance model (LMR) was established to determine the sustainable critical flux, which developed and simulated polymer film fouling successfully in a lab-scale membrane bioreactor (MBR) in this study. The total polymer film fouling resistance in the model was decomposed into the individual components of pore fouling resistance, sludge cake accumulation and cake layer compression resistance. The model effectively simulated the fouling phenomenon in the MBR at different fluxes. Considering the influence of temperature, the model was calibrated by temperature coefficient τ, and a good result was achieved to simulate the polymer film fouling at 25 and 15 °C. The relationship between flux and operation time was simulated and discussed through the model. The results indicated that there was an exponential correlation between flux and operation time, and the exponential curve could be divided into two parts. By fitting the two parts to two straight lines, respectively, the intersection of the two straight lines was regarded as the sustainable critical flux value. The sustainable critical flux obtained in this study was just 67% of the critical flux. The model in this study was proven to be in good agreement with the measurements under different fluxes and different temperatures. In addition, the sustainable critical flux was first proposed and calculated in this study, and it was shown that the model could be used to predict the sustainable operation time and sustainable critical flux, which provide more practical information for designing MBRs. This study is applicable to polymer films used in a wide variety of applications, and it is helpful for maintaining the long-term stable operation of polymer film modules and improving the efficiency of polymer film modules.

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Confounding Effect of Wetting, Compaction, and Fouling in an Ultra-Low-Pressure Membrane Filtration: A Review

Cited by 12 publications

References 78 publications

Pioneering the preparation of porous PIM-1 membranes for enhanced water vapor flow

Pioneering the preparation of porous PIM-1 membranes for enhanced water vapor flow

Ultra-Low Pressure Filtration Performance in Campus Domestic Waste

Determination of Sustainable Critical Flux through a Long-Term Membrane Resistance Model

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