The effect of feed formulation on surface composition of powders and wall deposition during spray drying of acidified dairy products

Dolores Vickovic; Tomasz Pawel Czaja; Claire Gaiani; Søren Juhl Pedersen; Lilia Ahrné; Anni Bygvrå Hougaard

doi:10.1016/j.powtec.2023.118297

The effect of feed formulation on surface composition of powders and wall deposition during spray drying of acidified dairy products

Dolores Vickovic, Tomasz Pawel Czaja, Claire Gaiani, Søren Juhl Pedersen, Lilia Ahrné, Anni Bygvrå Hougaard^*

^*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

4 Citationer (Scopus)

26 Downloads (Pure)

Abstract

Lactose and/or lactic acid was added to four acidified dairy formulations before spray drying in a small-scale pilot plant spray dryer, to investigate the effect on powder surface composition and wall deposition during spray drying. Addition of lactic acid significantly reduced the glass transition temperature of powders, whereas lactose had the opposite effect. Addition of lactic acid also led to a significant increase in wall deposition. No significant effect of the formulations was observed for moisture content, water activity and particle size. LF-NMR analysis suggested that lactic acid caused shift of water protons from a more mobile fraction to a tightly bound fraction. Confocal Raman microscopy and X-ray photoelectron spectroscopy (XPS) showed that the particle surface in all powders was dominated by proteins. Adding lactose and lactic acid increased the proportion of both components on the particle surface, thus making powders more susceptible to sticking and causing higher wall deposition.

Originalsprog	Engelsk
Artikelnummer	118297
Tidsskrift	Powder Technology
Vol/bind	418
Antal sider	9
ISSN	0032-5910
DOI	https://doi.org/10.1016/j.powtec.2023.118297
Status	Udgivet - 2023

Bibliografisk note

Funding Information:
The authors wish to acknowledge The Danish Dairy Research Foundation (DDRF) and GEA Process Engineering A/S for supporting this research. Thanks to Associate Professor Franciscus Winfried J van der Berg (University of Copenhagen), for providing an in-house MATLAB script for the analysis of glass transition temperatures. Thanks to Helle Maja Schultz (GEA Process Engineering A/S) for performing the moisture content and particle size analysis and the CNRS-LCPME (Nancy, France) for XPS analysis.

Publisher Copyright:
© 2023 The Authors

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10.1016/j.powtec.2023.118297Licens: CC BY

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Citationsformater

The effect of feed formulation on surface composition of powders and wall deposition during spray drying of acidified dairy products. / Vickovic, Dolores ; Czaja, Tomasz Pawel; Gaiani, Claire; Pedersen, Søren Juhl; Ahrné, Lilia ; Hougaard, Anni Bygvrå.

I: Powder Technology, Bind 418, 118297, 2023.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

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abstract = "Lactose and/or lactic acid was added to four acidified dairy formulations before spray drying in a small-scale pilot plant spray dryer, to investigate the effect on powder surface composition and wall deposition during spray drying. Addition of lactic acid significantly reduced the glass transition temperature of powders, whereas lactose had the opposite effect. Addition of lactic acid also led to a significant increase in wall deposition. No significant effect of the formulations was observed for moisture content, water activity and particle size. LF-NMR analysis suggested that lactic acid caused shift of water protons from a more mobile fraction to a tightly bound fraction. Confocal Raman microscopy and X-ray photoelectron spectroscopy (XPS) showed that the particle surface in all powders was dominated by proteins. Adding lactose and lactic acid increased the proportion of both components on the particle surface, thus making powders more susceptible to sticking and causing higher wall deposition.",

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T1 - The effect of feed formulation on surface composition of powders and wall deposition during spray drying of acidified dairy products

AU - Vickovic, Dolores

AU - Czaja, Tomasz Pawel

AU - Gaiani, Claire

AU - Pedersen, Søren Juhl

AU - Ahrné, Lilia

AU - Hougaard, Anni Bygvrå

PY - 2023

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N2 - Lactose and/or lactic acid was added to four acidified dairy formulations before spray drying in a small-scale pilot plant spray dryer, to investigate the effect on powder surface composition and wall deposition during spray drying. Addition of lactic acid significantly reduced the glass transition temperature of powders, whereas lactose had the opposite effect. Addition of lactic acid also led to a significant increase in wall deposition. No significant effect of the formulations was observed for moisture content, water activity and particle size. LF-NMR analysis suggested that lactic acid caused shift of water protons from a more mobile fraction to a tightly bound fraction. Confocal Raman microscopy and X-ray photoelectron spectroscopy (XPS) showed that the particle surface in all powders was dominated by proteins. Adding lactose and lactic acid increased the proportion of both components on the particle surface, thus making powders more susceptible to sticking and causing higher wall deposition.

AB - Lactose and/or lactic acid was added to four acidified dairy formulations before spray drying in a small-scale pilot plant spray dryer, to investigate the effect on powder surface composition and wall deposition during spray drying. Addition of lactic acid significantly reduced the glass transition temperature of powders, whereas lactose had the opposite effect. Addition of lactic acid also led to a significant increase in wall deposition. No significant effect of the formulations was observed for moisture content, water activity and particle size. LF-NMR analysis suggested that lactic acid caused shift of water protons from a more mobile fraction to a tightly bound fraction. Confocal Raman microscopy and X-ray photoelectron spectroscopy (XPS) showed that the particle surface in all powders was dominated by proteins. Adding lactose and lactic acid increased the proportion of both components on the particle surface, thus making powders more susceptible to sticking and causing higher wall deposition.

KW - Confocal Raman microscopy

KW - Spray dried acidified powders

KW - Surface composition

KW - Wall deposition

KW - X-ray photoelectron spectroscopy (XPS)

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DO - 10.1016/j.powtec.2023.118297

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