The effect of feed formulation on surface composition of powders and wall deposition during spray drying of acidified dairy products
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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 › fagfællebedømt
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TY - JOUR
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
N1 - Publisher Copyright: © 2023 The Authors
PY - 2023
Y1 - 2023
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)
U2 - 10.1016/j.powtec.2023.118297
DO - 10.1016/j.powtec.2023.118297
M3 - Journal article
AN - SCOPUS:85147849779
VL - 418
JO - Powder Technology
JF - Powder Technology
SN - 0032-5910
M1 - 118297
ER -
ID: 339846642