Convective drying of baker's yeast pellets containing a carrier

The drying behavior of yeast pellets containing a carrier was investigated. Yeast paste was mixed with different amounts of wheat flour, a solid carrier, to obtain spherical pellets with 69, 55, and 40 wt% of water. During the drying, the pellets moisture content, surface temperature, and dimensions...

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Bibliographic Details
Published inDrying technology Vol. 37; no. 11; pp. 1405 - 1417
Main Authors Van Engeland, C., Spreutels, L., Legros, R., Haut, B.
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 18.08.2019
Taylor & Francis Ltd
Subjects
Carrier
Convective drying
Drying
drying kinetics
Infrared cameras
Kinetics
Moisture content
Osmosis
Pellets
Shrinkage
Wheat
Yeast
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Summary:The drying behavior of yeast pellets containing a carrier was investigated. Yeast paste was mixed with different amounts of wheat flour, a solid carrier, to obtain spherical pellets with 69, 55, and 40 wt% of water. During the drying, the pellets moisture content, surface temperature, and dimensions were measured, using a balance, an infrared camera, and a stereomicroscope, respectively. A drying kinetics model was developed and successfully challenged to the experimental results. The experimental and modeling results give insights into the phenomena taking place during the drying of yeast pellets including a carrier. These results highlight that the addition of a carrier reduces the shrinkage of the pellets and increases the drying rate. Moreover, the results seem to indicate that an osmosis process may take place inside the pellets following the addition of the carrier.
ISSN:0737-3937
1532-2300
DOI:10.1080/07373937.2018.1504060