Filtration model for hollow fiber membranes with compressible cake formation

Kinčl, Jan; Doleček, Petr; Cakl, Jiřı́

doi:10.1016/j.desal.2007.11.068

Cited by 11 publications

(4 citation statements)

References 18 publications

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“…(3) A higher fouling propensity in pressurized module was observed than in submerged module. The compressibility of foulant is likely to be closely related to these phenomena as reported in the literature [8]. (4) The combined module showed the intermediate characteristics between the two modules.…”

Section: Discussionmentioning

confidence: 83%

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Comparison of fouling rates for pressurized and submerged ultrafiltration membranes

Kim

Jung

Lee

2014

Desalination and Water Treatment

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A B S T R A C TRecently, microfiltration (MF) and ultrafiltration (UF) are widely used for water treatment because of their advantages including small footprint, ease of operation, and high removal efficiency of bacteria and pathogenic protozoa. MF and UF membrane modules generally use hollow fibers that can be operated in either pressurized or submerged modes. In this study, we focused on comparison of pressurized and submerged membrane modules in terms of fouling rates. Synthetic feed waters were used for accelerated fouling tests. Labscale pressurized and submerged modules were fabricated using same UF fibers. In additions, a special module that allows the application of both positive and negative pressures was prepared. In the three systems (pressurized, submerged, and combined modules), the permeate flux was adjusted to be constant and the increase in transmembrane pressure was continuously monitored. Experimental results showed that the efficiency of the submerged module was better than that of the pressurized module. This may be attributed to the compaction of foulant layer due to the external pressure in the pressurized module. Accordingly, the fouling rate may depend on the ratio of external positive pressure to negative suction pressure in the combined module.

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Section: Discussionmentioning

confidence: 83%

“…The accumulation and deposition of these foulants are affected by the hydrodynamic conditions in hollow fiber MF/UF membranes, which are known to be more complex than those in other types of membranes. In addition, cake compressibility must be considered if the foulants are compressible [8].…”

Section: Introductionmentioning

confidence: 99%

Comparison of fouling rates for pressurized and submerged ultrafiltration membranes

Kim

Jung

Lee

2014

Desalination and Water Treatment

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“…By linking the result of the integration of Equation (7) with the membrane resistance (R m ) in Equation (8) and cake resistance (R c ) in Equation (9). [25], Equation (7) can be formulated as Equation (10).…”

Section: Cake Layer Modelmentioning

confidence: 99%

The Effect of Ca and Mg Ions on the Filtration Profile of Sodium Alginate Solution in a Polyethersulfone-2-(methacryloyloxy) Ethyl Phosphorylchloline Membrane

Arahman

Satria

Razi

et al. 2018

Water

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The efforts to improve the stability of membrane filtration in applications for wastewater treatment or the purification of drinking water still dominate the research in the field of membrane technology. Various factors that cause membrane fouling have been explored to find the solution for improving the stability of the filtration and prolong membrane lifetime. The present work explains the filtration performance of a hollow fiber membrane that is fabricated from polyethersulfone-2-(methacryloyloxy) ethyl phosphorylchloline while using a sodium alginate (SA) feed solution. The filtration process is designed in a pressure driven cross-flow module using a single piece hollow fiber membrane in a flow of outside-inside We investigate the effect of Ca and Mg ions in SA solution on the relative permeability, membrane resistance, cake resistance, and cake formation on the membrane surface. Furthermore, the performance of membrane filtration is predicted while using mathematical models that were developed based on Darcy’s law. Results show that the presence of Ca ions in SA solution has the most prominent effect on the formation of a cake layer. The formed cake layer has a significant effect in lowering relative permeability. The developed models have a good fit with the experimental data for pure water filtration with R2 values between 0.9200 and 0.9999. When treating SA solutions, the developed models fit well with experimental with the best model (Model I) shows R2 of 0.9998, 0.9999, and 0.9994 for SA, SA + Ca, and SA + Mg feeds, respectively.

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“…Chang et al 8 further reported an improved model using the cake filtration theory developed by Petsev et al In addition, Lee et al 12 developed a quantitative method to determine the major fouling during drinking water production under various conditions through combining three different fouling mechanisms such as standard blocking, complete blocking and cake formation. Similarly, by examining pressure drop cross the membrane and cake separately, Kinčl et al 13 developed a fundamental mathematical analysis for local flux distribution along the hollow fiber with compressible cake formation. To achieve maximum energy balance coupled with the application of exponential model to predict the permeate flux of hollow fiber ultrafiltration membrane.…”

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confidence: 99%

A filtration model for prediction of local flux distribution and optimization of submerged hollow fiber membrane module

Wang

et al. 2015

AIChE Journal

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IntroductionThe submerged membrane filtration has been increasingly used in membrane bioreactor and wastewater treatment processes in recent years. 1,2 In particular, the submerged hollow fiber membrane systems have gained more popularity than either flat-sheet or tubular membrane modules due to lower cost in fabrication and energy saving in operation. 3,4 However, it is very difficult to control the hydrodynamics of such systems owning to the Page 2 of 45 AIChE Journal AIChE JournalThis article is protected by copyright. All rights reserved.Revised manuscript AIChE-15-16842R2 for submission to AIChE Journal 3 non-uniform local flux distribution along the hollow fiber membrane. 5 As a result, hollow fibers may be more prone to fouling and require more frequent washing and cleaning. 6 Recently, a number of studies on modeling and optimization of the submerged hollow fiber membrane module have been carried out to alleviate membrane fouling and increase filtration efficiency. Chang and Fane 7 developed a mathematic model for submerged hollow fiber filtration under constant flux operating mode by combining Hagen-Poiseuille equation with the concept of critical flux. In this study, the effects of fiber characteristics (length, radius and membrane resistance) on local flux distribution along the fiber were investigated. Chang et al. 8 further reported an improved model using the cake filtration theory developed by Petsev et al. In addition, Lee et al. 12 developed a quantitative method to determine the major fouling during drinking water production under various conditions through combining three different fouling mechanisms such as standard blocking, complete blocking and cake formation. Similarly, by examining pressure drop cross the membrane and cake separately, Kinčl et al. 13 developed a fundamental mathematical analysis for local flux distribution along the hollow fiber with compressible cake formation. To achieve maximum energy balance coupled with the application of exponential model to predict the permeate flux of hollow fiber ultrafiltration membrane. The simulated results showed that the effect of operating pressure on permeate flux is more significant than that of feed concentration.Especially, Kim et al. 16 described a perturbation approach of the Navier-Stokes and continuity equations to investigate the effect of membrane length and hydraulic resistance on the steady-state laminar flow of the fluid in the fiber lumen. It indicated that the flow velocity in fiber lumen represents the exponential variation along the axial direction.Although these models provide valuable insight into the filtration behavior under various operating conditions, they only focused on the overall separation performance rather than local filtration behavior. In addition, as the simulated results have been barely proved by AIChE JournalThis article is protected by copyright. All rights reserved.Revised manuscript AIChE-15-16842R2 for submission to AIChE Journal 5 experimental tests, the applications of these theoretical works are...

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Filtration model for hollow fiber membranes with compressible cake formation

Cited by 11 publications

References 18 publications

Comparison of fouling rates for pressurized and submerged ultrafiltration membranes

Comparison of fouling rates for pressurized and submerged ultrafiltration membranes

The Effect of Ca and Mg Ions on the Filtration Profile of Sodium Alginate Solution in a Polyethersulfone-2-(methacryloyloxy) Ethyl Phosphorylchloline Membrane

A filtration model for prediction of local flux distribution and optimization of submerged hollow fiber membrane module

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