Thin-layer convective drying behaviour of brazilian peppertree leaves
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Bioscience journal (Online) |
Texto Completo: | https://seer.ufu.br/index.php/biosciencejournal/article/view/42203 |
Resumo: | 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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Thin-layer convective drying behaviour of brazilian peppertree leavesSecagem em camada delgada de folhas de aroeiraSchinus terebinthifolius RaddiLewis thin-layer drying modelTheoretical diffusion modelError analysisAgricultural SciencesStudies 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.Estudos sobre a cinética da secagem de plantas medicinais, aromáticas e condimentares são necessários para o estabelecimento de parâmetros operacionais de secagem de forma a não alterar significativamente a qualidade e o perfil fitoquímico dessas plantas. O objetivo do presente trabalho foi investigar a cinética da secagem das folhas da aroeira-vermelha (Schinus terebinthifolius), além de verificar se o modelo teórico de difusão e o modelo semi-empírico de Lewis são capazes de predizer com acurácia as curvas de secagem do produto a 35, 40 e 45°C, com fluxo de ar seco de 0,731 kg s-1 m-2. As folhas foram coletadas às 8:00, 12:00 e 17:00 h. O grau de adequação dos valores obtidos pelas curvas de secagem àqueles obtidos experimentalmente foi avaliado empregando-se o coeficiente de determinação, a raiz do erro quadrático médio, o erro percentual absoluto médio, o viés médio e o índice de ajuste. A análise da dispersão dos resíduos também foi utilizada na escolha do modelo de predição mais efetivo. Observou-se que a temperatura tem efeito significativo na transferência de massa e a taxa de secagem diminuiu continuamente ao longo da secagem. O horário de coleta das folhas não teve influência significativa sobre a cinética da secagem. A difusividade efetiva da água aumentou com o aumento da temperatura. Os resultados evidenciaram que o modelo de Lewis descreve com maior grau de acurácia a secagem de folhas de aroeira-vermelha que o modelo teórico baseado na Segunda Lei de Difusão de Fick.EDUFU2019-04-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.ufu.br/index.php/biosciencejournal/article/view/4220310.14393/BJ-v35n2a20198-42203Bioscience Journal ; Vol. 35 No. 2 (2019): Mar./Apr.; 540-560Bioscience Journal ; v. 35 n. 2 (2019): Mar./Apr.; 540-5601981-3163reponame:Bioscience journal (Online)instname:Universidade Federal de Uberlândia (UFU)instacron:UFUenghttps://seer.ufu.br/index.php/biosciencejournal/article/view/42203/25806Brazil; ContemporaryCopyright (c) 2019 Pedro Amorim Berbert, Marcia Terezinha Ramos de Oliveira, Marília Amorim Berbert-Molina, Karina de Jesus Soares, Antonione Araujo Coelhohttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessBerbert, Pedro AmorimOliveira, Marcia Terezinha Ramos deBerbert-Molina, Marília AmorimSoares, Karina de JesusCoelho, Antonione Araujo2022-02-02T11:47:25Zoai:ojs.www.seer.ufu.br:article/42203Revistahttps://seer.ufu.br/index.php/biosciencejournalPUBhttps://seer.ufu.br/index.php/biosciencejournal/oaibiosciencej@ufu.br||1981-31631516-3725opendoar:2022-02-02T11:47:25Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU)false |
dc.title.none.fl_str_mv |
Thin-layer convective drying behaviour of brazilian peppertree leaves Secagem em camada delgada de folhas de aroeira |
title |
Thin-layer convective drying behaviour of brazilian peppertree leaves |
spellingShingle |
Thin-layer convective drying behaviour of brazilian peppertree leaves Berbert, Pedro Amorim Schinus terebinthifolius Raddi Lewis thin-layer drying model Theoretical diffusion model Error analysis Agricultural Sciences |
title_short |
Thin-layer convective drying behaviour of brazilian peppertree leaves |
title_full |
Thin-layer convective drying behaviour of brazilian peppertree leaves |
title_fullStr |
Thin-layer convective drying behaviour of brazilian peppertree leaves |
title_full_unstemmed |
Thin-layer convective drying behaviour of brazilian peppertree leaves |
title_sort |
Thin-layer convective drying behaviour of brazilian peppertree leaves |
author |
Berbert, Pedro Amorim |
author_facet |
Berbert, Pedro Amorim Oliveira, Marcia Terezinha Ramos de Berbert-Molina, Marília Amorim Soares, Karina de Jesus Coelho, Antonione Araujo |
author_role |
author |
author2 |
Oliveira, Marcia Terezinha Ramos de Berbert-Molina, Marília Amorim Soares, Karina de Jesus Coelho, Antonione Araujo |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Berbert, Pedro Amorim Oliveira, Marcia Terezinha Ramos de Berbert-Molina, Marília Amorim Soares, Karina de Jesus Coelho, Antonione Araujo |
dc.subject.por.fl_str_mv |
Schinus terebinthifolius Raddi Lewis thin-layer drying model Theoretical diffusion model Error analysis Agricultural Sciences |
topic |
Schinus terebinthifolius Raddi Lewis thin-layer drying model Theoretical diffusion model Error analysis Agricultural Sciences |
description |
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. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-04-12 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.ufu.br/index.php/biosciencejournal/article/view/42203 10.14393/BJ-v35n2a20198-42203 |
url |
https://seer.ufu.br/index.php/biosciencejournal/article/view/42203 |
identifier_str_mv |
10.14393/BJ-v35n2a20198-42203 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://seer.ufu.br/index.php/biosciencejournal/article/view/42203/25806 |
dc.rights.driver.fl_str_mv |
https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.coverage.none.fl_str_mv |
Brazil; Contemporary |
dc.publisher.none.fl_str_mv |
EDUFU |
publisher.none.fl_str_mv |
EDUFU |
dc.source.none.fl_str_mv |
Bioscience Journal ; Vol. 35 No. 2 (2019): Mar./Apr.; 540-560 Bioscience Journal ; v. 35 n. 2 (2019): Mar./Apr.; 540-560 1981-3163 reponame:Bioscience journal (Online) instname:Universidade Federal de Uberlândia (UFU) instacron:UFU |
instname_str |
Universidade Federal de Uberlândia (UFU) |
instacron_str |
UFU |
institution |
UFU |
reponame_str |
Bioscience journal (Online) |
collection |
Bioscience journal (Online) |
repository.name.fl_str_mv |
Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU) |
repository.mail.fl_str_mv |
biosciencej@ufu.br|| |
_version_ |
1797069079824039936 |