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A physicochemical investigation of membrane fouling in cold microfiltration of skim milk

The main challenge in microfiltration (MF) is membrane fouling, which leads to a significant decline in permeate flux and a change in membrane selectivity over time. This work aims to elucidate the mechanisms of membrane fouling in cold MF of skim milk by identifying and quantifying the proteins...

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Main Authors: Tan, Teng Ju, Wang, Dan, Moraru, Carmen
Format: Article
Language:English
Published: Elsevier Science 2014
Subjects:
QD Chemistry
Online Access:http://irep.iium.edu.my/37677/1/PIIS0022030214003865.pdf
http://irep.iium.edu.my/37677/
http://www.sciencedirect.com/science/journal/00220302
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spelling my.iium.irep.37677 http://irep.iium.edu.my/37677/ A physicochemical investigation of membrane fouling in cold microfiltration of skim milk Tan, Teng Ju Wang, Dan Moraru, Carmen QD Chemistry The main challenge in microfiltration (MF) is membrane fouling, which leads to a significant decline in permeate flux and a change in membrane selectivity over time. This work aims to elucidate the mechanisms of membrane fouling in cold MF of skim milk by identifying and quantifying the proteins and minerals involved in external and internal membrane fouling. Microfiltration was conducted using a 1.4-μm ceramic membrane, at a temperature of 6 ± 1°C, cross-flow velocity of 6 m/s, and transmembrane pressure of 159 kPa, for 90 min. Internal and external foulants were extracted from a ceramic membrane both after a brief contact between the membrane and skim milk, to evaluate instantaneous adsorption of foulants, and after MF. Four foulant streams were collected: weakly attached external foulants, weakly attached internal foulants, strongly attached external foulants, and strongly attached internal foulants. Liquid chromatography coupled with tandem mass spectrometry analysis showed that all major milk proteins were present in all foulant streams. Proteins did appear to be the major cause of membrane fouling. Proteomics analysis of the foulants indicated elevated levels of serum proteins as compared with milk in the foulant fractions collected from the adsorption study. Caseins were preferentially introduced into the fouling layer during MF, when transmembrane pressure was applied, as confirmed both by proteomics and mineral analyses. The knowledge generated in this study advances the understanding of fouling mechanisms in cold MF of skim milk and can be used to identify solutions for minimizing membrane fouling and increasing the efficiency of milk MF. Elsevier Science 2014-08 Article PeerReviewed application/pdf en http://irep.iium.edu.my/37677/1/PIIS0022030214003865.pdf Tan, Teng Ju and Wang, Dan and Moraru, Carmen (2014) A physicochemical investigation of membrane fouling in cold microfiltration of skim milk. Journal of Dairy Science, 97 (8). pp. 4759-4771. ISSN 0022-0302 http://www.sciencedirect.com/science/journal/00220302 10.3168/jds.2014-7957
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
language English
topic QD Chemistry
spellingShingle QD Chemistry
Tan, Teng Ju
Wang, Dan
Moraru, Carmen
A physicochemical investigation of membrane fouling in cold microfiltration of skim milk
description The main challenge in microfiltration (MF) is membrane fouling, which leads to a significant decline in permeate flux and a change in membrane selectivity over time. This work aims to elucidate the mechanisms of membrane fouling in cold MF of skim milk by identifying and quantifying the proteins and minerals involved in external and internal membrane fouling. Microfiltration was conducted using a 1.4-μm ceramic membrane, at a temperature of 6 ± 1°C, cross-flow velocity of 6 m/s, and transmembrane pressure of 159 kPa, for 90 min. Internal and external foulants were extracted from a ceramic membrane both after a brief contact between the membrane and skim milk, to evaluate instantaneous adsorption of foulants, and after MF. Four foulant streams were collected: weakly attached external foulants, weakly attached internal foulants, strongly attached external foulants, and strongly attached internal foulants. Liquid chromatography coupled with tandem mass spectrometry analysis showed that all major milk proteins were present in all foulant streams. Proteins did appear to be the major cause of membrane fouling. Proteomics analysis of the foulants indicated elevated levels of serum proteins as compared with milk in the foulant fractions collected from the adsorption study. Caseins were preferentially introduced into the fouling layer during MF, when transmembrane pressure was applied, as confirmed both by proteomics and mineral analyses. The knowledge generated in this study advances the understanding of fouling mechanisms in cold MF of skim milk and can be used to identify solutions for minimizing membrane fouling and increasing the efficiency of milk MF.
format Article
author Tan, Teng Ju
Wang, Dan
Moraru, Carmen
author_facet Tan, Teng Ju
Wang, Dan
Moraru, Carmen
author_sort Tan, Teng Ju
title A physicochemical investigation of membrane fouling in cold microfiltration of skim milk
title_short A physicochemical investigation of membrane fouling in cold microfiltration of skim milk
title_full A physicochemical investigation of membrane fouling in cold microfiltration of skim milk
title_fullStr A physicochemical investigation of membrane fouling in cold microfiltration of skim milk
title_full_unstemmed A physicochemical investigation of membrane fouling in cold microfiltration of skim milk
title_sort physicochemical investigation of membrane fouling in cold microfiltration of skim milk
publisher Elsevier Science
publishDate 2014
url http://irep.iium.edu.my/37677/1/PIIS0022030214003865.pdf
http://irep.iium.edu.my/37677/
http://www.sciencedirect.com/science/journal/00220302
_version_ 1643616664296620032
score 13.211869

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