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- Title
Scale-up and optimization of the spray drying conditions for the development of functional microparticles based on chia oil.
- Authors
Bordón, María Gabriela; Ximena Alasinoc, Noelia Pía; Villanueva-Lazo, Álvaro; Carrera-Sanchez, Cecilio; Pedroche-Jimenez, Justo; Carmen Millán-Linares, María del; Ribotta, Pablo Daniel; Martinez, Marcela Lilian
- Abstract
A factorial design was performed for the microencapsulation of chia oil by spray drying at pilot-scale, to validate the results obtained previously at laboratory scale in a Büchi-B290. The effects of drying-air inlet (Tinlet) and outlet (Toutlet) temperatures in a Niro Production Minor on the solid yield, thermal efficiency, theoretical droplet evaporation times, and physico-chemical properties of powders were analyzed. The theoretical droplet evaporation times (0.31−0.54 s) were calculated considering the constant and falling rate periods and a negligible relative velocity between spray and air. Critical diameters between 31.77–41.57 μm were estimated for microcapsules, depending on the process conditions. After scale-up of the spray drying operation, higher solid yields (74.24–79.79%), thermal efficiencies (27.56–73.19%), encapsulation efficiencies (96.97–98.57%), and enhanced flowability of products, compared with experiments at laboratory scale, were observed. Moreover, the scale-up did not affect the chemical composition of microencapsulated oils, their fatty acid composition before and after in-vitro digestion processes. A global optimization was performed at pilot-scale and the process conditions that simultaneously optimized all the responses was 160 °C × 90 °C (Tinlet × Toutlet).
- Subjects
SPRAY drying; BASE oils; RELATIVE velocity; THERMAL efficiency; FACTORIAL experiment designs; VEGETABLE oils
- Publication
Food & Bioproducts Processing: Transactions of the Institution of Chemical Engineers Part C, 2021, Vol 130, p48
- ISSN
0960-3085
- Publication type
Article
- DOI
10.1016/j.fbp.2021.08.006