Increasing energy efficiency in microencapsulation of soybean oil by spray drying / Aumento da eficiência energética na microencapsulação de óleo de soja por spray drying

Nina Katia da Silva James, Luiz Paulo Sousa Castro, Suely Pereira Freitas, Regina Isabel Nogueira

Abstract


The aim of this study was to evaluate the influence of inlet air temperature of spray drying on microparticles properties and heat loss on drying chamber in sense to select the conditions that promote the preservation of functional compounds and improve energy efficiency. The energy efficiency of the process was evaluated varying inlet air temperature (T) from 110 to 150 °C and airflow (AF) from 20 to 40kg/h, being the energy efficiency, the response variable. The microspheres presented a continuous surface and no cracking, which hinders the diffusion of air and reduces the probability of triglycerides oxidation in the nucleus. The heat loss curves were plotted considering the principles of mass and energy conservation applied to both input and output currents. Further, the thermodynamic parameters were continuously monitored during the spray dryer. So, the selected operational conditions (T = 130 °C, AF = 20 kg.h1) allowed to achieve high encapsulation efficiency (95%) and saving energy compared to conventional processes using inlet air temperatures above 180 °C, a significant improvement to thermo-sensitive compounds.

 


Keywords


drying temperature; lower temperature; spray drying; encapsulation efficiency; heat loss; thermo-sensitive compounds

References


AOAC, 2014. Official methods of analysis of AOAC International. 18th ed. Maryland, USA: AOAC Press. Available from: http://sutlib2.sut.ac.th/sut_contents/H125800.pdf. [Accessed 20 June 2016].

Bae, E.K. and Lee, S.J., 2008. Microencapsulation of avocado oil by spray drying using whey protein and maltodextrin. Journal of Microencapsulation, 25 (8), 549–560.

Carneiro, H.C.F., Tonon, R. V., Grosso, C.R.F., and Hubinger, M.D., 2013. Encapsulation efficiency and oxidative stability of flaxseed oil microencapsulated by spray drying using different combinations of wall materials. Journal of Food Engineering, 115 (4), 443–451.

Goula, A.M. and Adamopoulos, K.G., 2008. Effect of maltodextrin addition during spray drying of tomato pulp in dehumidified air: II. powder properties. Drying Technology, 26 (6), 726–737.

LUIKOV, A.V. Heat and Mass transfer. [S.l.]: Central Books Ltd, 1982. ISBN-13: 978-0714717425.

Martínez, M.L., Curti, M.I., Roccia, P., Llabot, J.M., Penci, M.C., Bodoira, R.M., and Ribotta, P.D., 2015. Oxidative stability of walnut (Juglans regia L.) and chia (Salvia hispanica L.) oils microencapsulated by spray drying. Powder Technology, 270 (Part A), 271–277.

Ng, S.K., Wong, P.Y., Tan, C.P., Long, K., and Nyam, K.L., 2013. Influence of the inlet air temperature on the microencapsulation of kenaf (Hibiscus cannabinus L.) seed oil. European Journal of Lipid Science and Technology, 115 (11), 1309–1318.

Nickerson, M.T. and Chang, C., 2018. Encapsulation of omega 3-6-9 fatty acids-rich oils using protein- based emulsions with spray drying. Journal of Food Science and Technology, 55 (8), 2850–2861.

O’Sullivan, J.J., Norwood, E.A., O’Mahony, J.A., and Kelly, A.L., 2019. Atomisation technologies used in spray drying in the dairy industry: A review. Journal of Food Engineering, 243 (May 2018), 57–69.

Percy, S., 1872. Improvement in Drying and Concentrating Liquid Substances by Atomizing. US125406.

Perry, R.H. and Chilton, C.H., 1980. Manual de Engenharia Química. H. Macedo, L.M. Barbosa, P.E.F. Barbosa (Trad.). Rio de Janeiro: Guanabara Dois S. A.

Reineccius, G.A. and Yan, C., 2016. Factors controlling the deterioration of spray dried flavourings and unsaturated lipids. Flavour and Fragrance Journal, 31 (1), 5–21.

Tonon, R. V., Brabet, C., and Hubinger, M.D., 2008. Influence of process conditions on the physicochemical properties of açai (Euterpe oleraceae Mart.) powder produced by spray drying. Journal of Food Engineering, 88 (3), 411–418.




DOI: https://doi.org/10.34117/bjdv5n7-036

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