Analysis of membrane pore blocking models applied to the ultrafiltration of PEG

Vincent‐Vela, María‐Cinta; Blanco, Silvia; García, Jaime Lora; Rodríguez, Enrique Bergantiños

doi:10.1016/j.seppur.2008.02.028

Cited by 185 publications

(103 citation statements)

References 22 publications

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“…As observed earlier, the microscopic image of the feed shows a significant amount of char particles greater than 1 µm in size. Similar results were presented by Vela et al [19] in the ultrafiltration of PEG through monotubular ceramic membranes. …”

Section: Figure17supporting

confidence: 89%

Fast Pyrolysis Oil Stabilization: An Integrated Catalytic and Membrane Approach for Improved Bio-oils. Final Report

Huber¹,

Upadhye²,

Ford³

et al. 2012

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Section: Figure17supporting

confidence: 89%

Fast Pyrolysis Oil Stabilization: An Integrated Catalytic and Membrane Approach for Improved Bio-oils. Final Report

Huber¹,

Upadhye²,

Ford³

et al. 2012

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“…Values for the parameter n, depending on the type of fouling, are the following (figure 1): complete pore blocking (n = 2), partial pore blocking (n = 1), internal pore blocking (n = 3/2) and gel layer formation (n = 0). The constant k depends on the transmembrane pressure, the dynamic permeate viscosity and the blocked areas per unit of permeate flux and the membrane resistance, R m [26]. The parameters considered by these models have a physical meaning and contribute to the comprehension of the mechanisms involved in membrane fouling.…”

Section: Introductionmentioning

confidence: 99%

Clarification of pomegranate juice by ultrafiltration: study of juice quality and of the fouling mechanism

Baklouti

Ellouze-Ghorbel²,

Mokni³

2012

Fruits

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-Introduction. Ultrafiltration (UF) is a single-unit operation for the clarification and fining of fruit juices. The purpose of the UF is to remove suspended solids as well as haze-inducing and turbidity-causing substances to obtain a clear juice during storage. Specifically, the polymerization of phenolic compounds and their interaction with other components (e.g., proteins) could cause a haze complex and turbidity in fruit juices, which can foul the ultrafiltration membrane. Materials and methods. Fresh pomegranate juice was clarified by the ultrafiltration process on a laboratory scale. In experimental tests performed according to the total recycle and the batch concentration mode, the effects of transmembrane pressure (TMP) and enzyme pre-treatment on permeation flux and quality of juice were studied. Results. With the total recycle mode, the effect of TMP on the color and clarity of clarified pomegranate juice was significant. The initial color of the raw pomegranate juice was reduced from 74% to 33% and the clarity decreased from 77% to 42% by UF when the TMP increased from (1 to 3.6) bar. Total phenolic rejection decreased from 45% to 21% when the TMP rose from (1 to 2) bar and remained constant above this value. With the batch concentration mode at TMP = 2 bar and velocity 1 m·s -1 , the enzymatic treatment (5 U·mL -1 , 300 min, T = 20°C) of pomegranate juice provided the highest permeate flux, a decrease in total phenolics of 50% and an increased clarity of 30%. Fouling of the UF membrane during pomegranate juice processing is mainly due to the retention of polyphenols and/or proteins; thus, several blocking mechanisms were studied, using a recently developed membrane-fouling model. Analysis revealed that the membrane separation process was controlled by the gel layer mechanism of raw pomegranate juice and complete pore blocking mechanism with enzymatic pretreatment. Tunisia / Punica granatum / fruit juices / clarifying / ultrafiltration / phenolic compounds / membranes / fouling / processing / laccase Clarification du jus de grenade par ultrafiltration : étude de la qualité du jus et du mécanisme de colmatage.Résumé -Introduction.L'ultrafiltration (UF) est un procédé simple pour la clarification et pour l'affinage de jus de fruits. Son objectif est d'éliminer les matières en suspension ainsi que les substances induisant trouble et turbidité pendant son stockage. Plus précisément, la polymérisation des composés phénoliques et leur interaction avec d'autres composants (des protéines, par exemple) pourraient causer du trouble et de la turbidité dans les jus de fruits, conduisant au colmatage de la membrane d'ultrafiltration. Matériel et méthodes. Un jus de grenade frais a été clarifié par ultrafiltration. Les essais expérimentaux ont été effectués en mode de recyclage total ou en batch par renvoi du retentât dans la cuve d'alimentation. Les effets de la pression transmembranaire (PTM) et d'un prétraitement enzymatique sur le flux de perméation et la qualité des jus ont été étudiés. Résultats. Ave...

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“…From the above unified fouling model, four classical fouling models can be derived for different values of the fouling parameter n. The four models are cake filtration (n = 0), intermediate blocking (n = 1), internal blocking (n = 3/2) and the complete blocking model (n = 2). By integration of (5), we obtain the differential equation for the permeate flux [16,17], which is expressed as:…”

Section: Membrane Foulingmentioning

confidence: 99%

Combined Estimation and Optimal Control of Batch Membrane Processes

et al. 2016

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Abstract:In this paper, we deal with the model-based time-optimal operation of a batch diafiltration process in the presence of membrane fouling. Membrane fouling poses one of the major problems in the field of membrane processes. We model the fouling behavior and estimate its parameters using various methods. Least-squares, least-squares with a moving horizon, recursive least-squares methods and the extended Kalman filter are applied and discussed for the estimation of the fouling behavior on-line during the process run. Model-based optimal non-linear control coupled with parameter estimation is applied in a simulation case study to show the benefits of the proposed approach.

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Analysis of membrane pore blocking models applied to the ultrafiltration of PEG

Cited by 185 publications

References 22 publications

Fast Pyrolysis Oil Stabilization: An Integrated Catalytic and Membrane Approach for Improved Bio-oils. Final Report

Fast Pyrolysis Oil Stabilization: An Integrated Catalytic and Membrane Approach for Improved Bio-oils. Final Report

Clarification of pomegranate juice by ultrafiltration: study of juice quality and of the fouling mechanism

Combined Estimation and Optimal Control of Batch Membrane Processes

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