Study of vacuum and freeze drying of bee honey
| Autor: | B Kosta Gligorevic, B Kristina Lazarevic, D Milan Gojak, J Ivan Zlatanovic, B Milos Pajic, S Milan Drazic, R Nedzad Rudonja, M Nebojsa Nedic |
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| Rok vydání: | 2020 |
| Předmět: |
drying kinetics
biology Water activity Moisture Renewable Energy Sustainability and the Environment Chemistry lcsh:Mechanical engineering and machinery 020209 energy quality parameters Acacia 02 engineering and technology biology.organism_classification bee honey Diastase Freeze-drying freeze drying Helianthus annuus 0202 electrical engineering electronic engineering information engineering biology.protein lcsh:TJ1-1570 Food science Bee honey Water content vacuum drying |
| Zdroj: | Thermal Science, Vol 24, Iss 6 Part B, Pp 4241-4251 (2020) |
| ISSN: | 2334-7163 0354-9836 |
| DOI: | 10.2298/tsci200317194n |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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