Assessment of differences between products obtained in conventional and vacuum spray dryer
Autor: | Fernanda de Melo Ramos, Cíntia Carla Melgaço de Oliveira, Vivaldo Silveira Junior, Ana Silvia Prata Soares |
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Rok vydání: | 2016 |
Předmět: |
Water activity
Chemistry vacuum Spray dryer Analytical chemistry maltodextrin lcsh:TX341-641 04 agricultural and veterinary sciences vacuum spray dryer Maltodextrin 040401 food science Bulk density chemistry.chemical_compound 0404 agricultural biotechnology Chemical engineering thermosensitive compounds Spray drying lcsh:Technology (General) Particle-size distribution lcsh:T1-995 Solubility lcsh:Nutrition. Foods and food supply Water content Food Science Biotechnology |
Zdroj: | Food Science and Technology v.36 n.4 2016 Food Science and Technology (Campinas) Sociedade Brasileira de Ciência e Tecnologia de Alimentos (SBCTA) instacron:SBCTA Food Science and Technology, Volume: 36, Issue: 4, Pages: 724-729, Published: 19 SEP 2016 Food Science and Technology, Vol 36, Iss 4, Pp 724-729 Food Science and Technology, Iss 0 |
ISSN: | 1678-457X 0101-2061 |
DOI: | 10.1590/1678-457x.09216 |
Popis: | In this work, an experimental unit of a vacuum spray dryer was built. This prototype attempted to combine the advantages of freeze-drying (drying at low temperatures due to vacuum) and spray drying (increase of surface area aiming the improvement of heat transfer efficiency). Maltodextrin solutions were dried in the vacuum operated equipment and in conventional spray dryer. The vacuum spray dryer system allowed obtaining powder at low temperatures due to the lowering of pressure conditions (2-5 kPa) inside the drying chamber. The products obtained in the two systems were characterized and compared for particle size distribution, moisture content, water activity, bulk density and solubility in water. The processes yields were also evaluated and compared. The vacuum spray dryer system allowed the production of larger, more soluble and less dense particles than those obtained in the conventional configuration of the equipment, resulting in drier and, therefore, with lower water activity particles. Thus, the use of the vacuum spray dryer as a drying technique may be an alternative for the production of powder rich in thermosensitive compounds. |
Databáze: | OpenAIRE |
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