Thin-layer convective drying behaviour of brazilian peppertree leaves

Authors

  • Pedro Amorim Berbert Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF) / Northern Rio de Janeiro State University http://orcid.org/0000-0003-2480-8162
  • Marcia Terezinha Ramos de Oliveira Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Marília Amorim Berbert-Molina Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Karina de Jesus Soares Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Antonione Araujo Coelho Universidade Estadual do Norte Fluminense Darcy Ribeiro

DOI:

https://doi.org/10.14393/BJ-v35n2a20198-42203

Keywords:

Schinus terebinthifolius Raddi, Lewis thin-layer drying model, Theoretical diffusion model, Error analysis

Abstract

Studies on the drying kinetics of medicinal, aromatic and spice plants are a necessary step towards establishing the combination of drying parameters that would not qualitatively and quantitatively alter the quality of the fresh product. The purpose of this study was to investigate the drying kinetics of Brazilian peppertree (Schinus terebinthifolius) leaves and to verify whether the theoretical diffusion and the semi-empirical Lewis drying models were capable of accurately predicting the drying curves of the product at 35, 40, and 45°C, with a dry air mass flow rate of 0.731 kg s-1 m-2. Leaves were collected at 0800 h, 1200 h and 1700 h. The goodness of fit between experimental and predicted values was based on the correlation coefficient, root mean square error, mean absolute percentage error, mean bias error, and fit index. Residual plot analysis was also considered in the selection of the most effective drying model. Temperature had a pronounced effect on mass transfer and drying rate decreased continuously during the course of drying. Leaf collection time had little influence on the drying kinetics. Effective moisture diffusivity was found to increase with temperature. The results indicated that the Lewis model was considered a better predictor of the thin-layer drying behaviour of Brazilian peppertree leaves than the theoretical model based on Fick’s second law of diffusion.

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Author Biography

Pedro Amorim Berbert, Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF) / Northern Rio de Janeiro State University

Laboratório de Engenharia Agrícola (LEAG) / Agricultural Engineering Laboratory, Lecturer and Researcher, Ph.D.

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Published

2019-04-12

How to Cite

BERBERT, P.A., OLIVEIRA, M.T.R. de, BERBERT-MOLINA, M.A., SOARES, K. de J. and COELHO, A.A., 2019. Thin-layer convective drying behaviour of brazilian peppertree leaves. Bioscience Journal [online], vol. 35, no. 2, pp. 540–560. [Accessed28 November 2022]. DOI 10.14393/BJ-v35n2a20198-42203. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/42203.

Issue

Section

Agricultural Sciences