MRI investigations of filtration: Fouling and cleaning processes

Schork, Nicolas; Schuhmann, Sebastian; Arndt, F.; Schütz, Steffen; Guthausen, Gisela; Nirschl, Hermann

doi:10.1016/j.micromeso.2017.05.042

Cited by 21 publications

(17 citation statements)

References 21 publications

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“…As a result, the filtration mechanism cannot be consistently described by a loose concentration polarization that can easily be reversed by back diffusion, when pressure is released, as has been shown in alginate filtration experiments in the work of Schuhmann et al To further detach the remaining fouling layer and fully recover the filtration performance of the hollow fiber membrane, additional cleaning of the membrane layer must be performed. For example, back‐washing or even chemical cleaning of the hollow fiber are needed to detach the adhesive or agglomerated part of the fouling layer …”

Section: Resultsmentioning

confidence: 99%

“…The experiments were performed in dead‐end filtration mode. A complete description of the filtration setup and its configuration options can be found in previous studies …”

Section: Methodsmentioning

confidence: 99%

“…A complete description of the filtration setup and its configuration options can be found in previous studies. [32][33][34]…”

Section: In Situ Filtration Experimentsmentioning

confidence: 99%

“…MRI was used for an in situ analysis of many membrane processes . MRI allows not only a measurement in an optically transparent setup but is also a non‐invasive analysis method in opaque ceramic hollow fibers that are used in this publication …”

Section: Introductionmentioning

confidence: 99%

“…[17,[26][27][28][29] MRI allows not only a measurement in an optically transparent setup but is also a non-invasive analysis method in opaque ceramic hollow fibers that are used in this publication. [17,[30][31][32][33][34] 2 | EXPERIMENTAL…”

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confidence: 99%

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In situ measurement of deposit layer formation during skim milk filtration by MRI

Schork

Schuhmann

Nirschl

et al. 2019

Magnetic Reson in Chemistry

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Filtration and separation via membranes are key processes in food processing. One major application of membrane filtration is in the dairy industry, aiming for the separation of different milk proteins. The various chemical components of milk possess different physiochemical properties and can be used most effectively in food processing if they are separately available and remain in their native state. Microfiltration of skim milk allows a fractionation of the milk proteins casein and whey by size. A deposit is formed on the membrane surface mainly but not exclusively by micellar casein proteins during filtration. Membrane pore blockage by whey proteins and fouling occur during membrane filtration, negatively affecting the yield of the whey protein fraction. Skim milk filtration and the deposit layer formation were measured time and spatially resolved by in situ magnetic resonance imaging (MRI). The nature of the fouling layer was investigated during dead‐end filtration in ceramic hollow fiber membranes. MRI was used to further clarify the influence of operating conditions on separation and filtration mechanisms that are responsible for growth of the fouling layer and its reversibility. The MRI measurements were analyzed for a detailed description of skim milk filtration by modeling the signal intensity distribution.

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Section: Resultsmentioning

confidence: 99%

“…The experiments were performed in dead‐end filtration mode. A complete description of the filtration setup and its configuration options can be found in previous studies …”

Section: Methodsmentioning

confidence: 99%

“…A complete description of the filtration setup and its configuration options can be found in previous studies. [32][33][34]…”

Section: In Situ Filtration Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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In situ measurement of deposit layer formation during skim milk filtration by MRI

Schork

Schuhmann

Nirschl

et al. 2019

Magnetic Reson in Chemistry

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Magnetic Resonance Imaging of Membrane Filtration Processes

Wypysek¹,

Weßling²

2022

Magnetic Resonance Microscopy

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NMR‐Messmethoden

Schuhmann¹,

Guthausen²

2020

Chemie in nserer Zeit

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Zusammenfassung Durch die vielseitigen Einsatzmöglichkeiten der zerstörungsfreien und nichtinvasiven NMR‐Messmethodik können zahlreiche verfahrenstechnische Prozesse wie Kristallisation, Alterung, Separation oder chemische Reaktion hinsichtlich Molekülstruktur, Moleküldynamik, Diffusion, und mesoskopischer Struktur detailliert charakterisiert werden. Dabei wird beispielsweise die NMR‐Spektroskopie zur quantitativen Messung chemischer Reaktionen verwendet. Die NMR‐Bildgebung ist als Magnetresonanztomographie in der Medizin bekannt. Mit ihr kann in der Verfahrenstechnik beispielsweise das Zusetzen von Membranfiltern bei verschiedenen Betriebsbedingungen charakterisiert werden. Auch zur Bestimmung von Produkteigenschaft und Produktqualität werden NMR‐Methoden im industriellen Maßstab verwendet, um zum Beispiel Verfälschungen in Lebensmitteln aufzudecken oder den Öl‐ bzw. Fettgehalt zu bestimmen.

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MRI investigations of filtration: Fouling and cleaning processes

Cited by 21 publications

References 21 publications

In situ measurement of deposit layer formation during skim milk filtration by MRI

In situ measurement of deposit layer formation during skim milk filtration by MRI

Magnetic Resonance Imaging of Membrane Filtration Processes

NMR‐Messmethoden

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