A numerical approach to study the impact of packing density on fluid flow distribution in hollow fiber module

Günther, Jan; Schmitz, Philippe; Albasi, Claire; Lafforgue, Christine

doi:10.1016/j.memsci.2009.11.011

Cited by 70 publications

(37 citation statements)

References 32 publications

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“…Strategies to mitigate fouling are required to avoid decline in the membrane permeability in dead-end submerged HF systems [6,282,283]. It is possible to minimize fouling both by choosing a suitable membrane material with a reduced tendency to adsorb substances in the feed and by optimizing the operating conditions in the system [5,161,284,285].…”

Section: Techniques For Fouling Control In Dead-end Submerged Membranmentioning

confidence: 99%

Section: Backwashingmentioning

confidence: 99%

“…Figure 8 illustrates a typical TMP profile with intermittent backwashing and chemical cleaning with a fixed cycle time. Although backwashing loosens and detaches the fouling cake from the membrane surface so that the foulants can be removed easily by cross-flow or air bubbles [6,25,90,93,288,289], some Although backwashing loosens and detaches the fouling cake from the membrane surface so that the foulants can be removed easily by cross-flow or air bubbles [6,25,90,93,288,289], some drawbacks also exist. In cases for which the cake layer serves as a secondary layer to protect the membrane from internal fouling by macromolecular components, over-frequent backwashing can provide more opportunity for macromolecules to enter the membrane pores [290] or change the chemical composition and/or structure of the fouling layer (e.g., from a mixed cake layer of particulates and macromolecules to a fouling structure dominated by the macromolecules after several filtration/cleaning cycles [291]) and consequently the fouling patterns [26].…”

Section: Backwashingmentioning

confidence: 99%

See 2 more Smart Citations

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

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Abstract:The submerged membrane filtration concept is well-established for low-pressure microfiltration (MF) and ultrafiltration (UF) applications in the water industry, and has become a mainstream technology for surface-water treatment, pretreatment prior to reverse osmosis (RO), and membrane bioreactors (MBRs). Compared to submerged flat sheet (FS) membranes, submerged hollow fiber (HF) membranes are more common due to their advantages of higher packing density, the ability to induce movement by mechanisms such as bubbling, and the feasibility of backwashing. In view of the importance of submerged HF processes, this review aims to provide a comprehensive landscape of the current state-of-the-art systems, to serve as a guide for further improvements in submerged HF membranes and their applications. The topics covered include recent developments in submerged hollow fiber membrane systems, the challenges and developments in fouling-control methods, and treatment protocols for membrane permeability recovery. The highlighted research opportunities include optimizing the various means to manipulate the hydrodynamics for fouling mitigation, developing online monitoring devices, and extending the submerged HF concept beyond filtration.

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Section: Techniques For Fouling Control In Dead-end Submerged Membranmentioning

confidence: 99%

Section: Backwashingmentioning

confidence: 99%

Section: Backwashingmentioning

confidence: 99%

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The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

et al. 2017

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“…These effects will be accounted for in further works in order to propose an accurate model of cake resistance and consequent flow and predict filtration performances. This numerical model will be based on a previous study …”

Section: Resultsmentioning

confidence: 99%

A multiscale approach to study dead end microfiltration of mono and bidispersed particle suspensions

et al. 2014

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Microfiltration of particle suspensions is widely used, especially in bioprocess engineering. However, particle accumulation at the filter surface reduces productivity and can modify selectivity of the separation. Numerous macroscopic models have been developed to predict filtration performance and help in device design, assuming a uniform cake formation. In order to improve the model accuracy, cake formation mechanisms have to be better understood at the microscale level. The objective of this work is to study the cake build up at the particle level and to establish correlations with microfiltration performance measured at the process scale. 3D characterization of microsieves fouling was achieved using Confocal Laser Scanning Microscopy (CLSM) and a filtration chamber allowing direct microscopic observations of particle deposition and cake characterization, specially designed for in situ observations. Suspensions of fluorescent monodispersed and bidispersed spherical particle (1 µm and 4.8 µm) were filtered under constant flow rate through 0.8 µm pore diameters silicon nitride microsieve. Online images of particle deposition were recorded and the cake build up was followed layer by layer. The relations between cake resistance and particle organizations were studied.

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“…53 The volume fraction of the fibers (ϕ) is calculated by the below equation: It should be notified that the present study is focused on the entire HFM module, and the adoption of Happels free surface model enables the simulation to be simplified into the one of single fiber and its local shell space.…”

Section: The Governing Equations In the Shellmentioning

confidence: 99%

Hydrogen recovery from ammonia purge gas by a membrane separator: A simulation study

Maarefian¹,

Bandehali

Azami

et al. 2019

Int J Energy Res

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Summary In this study, a two‐dimensional mathematical model is proposed for modeling the hollow fiber membrane (HFM) separators for hydrogen (H2) recovery unit implemented in the Razi Petrochemical Company (Imam Khomeini Port, Iran) to capture hydrogen from ammonia (NH3) purge gas. In this regard, computational fluid dynamics is applied to solve the equations of momentum and mass transfer in the laminar flow conditions. Axial and radial diffusion for mass transfer inside the membrane fibers and axial diffusion within the shell side of separator were considered. The distributions of concentration, velocity, and mass transfer fluxes were achieved by the model. As the new insights, the effects of feed flow rate and feed gas concentration on mass transfer of H2 were investigated. Moreover, fluid velocity profile and H2 fluxes in the tube (fiber), membrane, and shell sides of the HFM separator were studied. The results of simulation were compared with the industrial data and showed that the present developed model has excellent agreement with the experimental data with a low mean deviation value of 3.5%.

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A numerical approach to study the impact of packing density on fluid flow distribution in hollow fiber module

Cited by 70 publications

References 32 publications

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

The Performance and Fouling Control of Submerged Hollow Fiber (HF) Systems: A Review

A multiscale approach to study dead end microfiltration of mono and bidispersed particle suspensions

Hydrogen recovery from ammonia purge gas by a membrane separator: A simulation study

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