Development of yoghurt powder using microwave-assisted foam-mat drying

Abstract

Yoghurt powder is widely used in industries of confectionery and baking. The production of yoghurt powder can be made by several drying methods, including freeze, spray, microwave vacuum, convective and foam-mat. In this study, the effect of varying concentrations of egg albumin (EA) on foam and powder characteristics of yoghurt were determined. Besides, microwave-assisted foam-mat drying of yoghurt was carried out to examine the effects of three microwave output powers (100, 180 and 300 W) on powder properties of yoghurt. Increased in EA concentration resulted in an increase in foam expansion and decrease in foam density. Higher foam stability (after 120 min.) was observed for foams containing 10 and 15% EA (both found as 88.24%). As powder properties, wettability and solubility times were significantly decreased with the addition of EA, while water holding capacity was increased. Change in EA concentration was significantly (p ≤ 0.05) effective on all powder properties dried at 100 W. Carr Index and Hausner Ratio values were in the range of 0.99–13.89 and 1.01–1.17, respectively. Microwave powers were significantly (p ≤ 0.05) effective on the flowability of powders containing 0, 5 and 10% EA. Yoghurt powders showed mostly excellent flow characteristics (for all concentrations of EA and microwave output powers).

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Fig. 1

Data Availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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ANY carried out literature survey and experiments, analyzed the data and wrote the manuscript.

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Correspondence to Ayşe Nur Yüksel.

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Yüksel, A.N. Development of yoghurt powder using microwave-assisted foam-mat drying. J Food Sci Technol (2021). https://doi.org/10.1007/s13197-021-05035-2

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Keywords

  • Yoghurt
  • Foam-mat
  • Egg albumin
  • Microwave
  • Flowability