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STUDY OF VACUUM AND FREEZE DRYING OF BEE HONEY.
- Source :
- Thermal Science; 2020, Vol. 24 Issue 6B, p4241-4251, 11p
- Publication Year :
- 2020
-
Abstract
- The aim of this research is to study the drying kinetics of vacuum-dried and freeze-dried bee honey produced from two different varieties: Sunflower honey (Helianthus Annuus L.) and Acacia honey (Robinia pseudo acacia L.). Vacuum drying treatments were carried out with the honey samples' initial temperatures of +25 °C, -20 °C, and -40 °C. Water content, total soluble solids, as well as the water activity of fresh and dried honey samples were determined. Freeze-drying of bee honey with initial sample temperature of -40°C has resulted in shorter drying time (7-9 hours), moisture content (10%-12%), water activity (0.405-0.427 aW) and effective moisture diffusivity coefficient (8.26·10-7-9.51·10-7 m²/s). The high-performance liquid chromatography method was used when analyzing the impact that drying pre-treatments had on honey quality. The application of pre-treatments has led to an increase in hydroxy-methyl-furfural by 39-71%, and a decrease in diastase activity by 17-36%, all compared to fresh honey samples. The solutions of Verma model proved to be the best fit with the experimental results. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03549836
- Volume :
- 24
- Issue :
- 6B
- Database :
- Complementary Index
- Journal :
- Thermal Science
- Publication Type :
- Academic Journal
- Accession number :
- 147470716
- Full Text :
- https://doi.org/10.2298/TSCI200317194N