Abstract
The objectives of this study were to determine a suitable thin layer drying model to describe the drying kinetics of Guazuma ulmifolia leaves and determine the mass transfer parameters of Guazuma ulmifolia leaves. The drying of Guazuma ulmifolia leaves was conducted in a laboratory scale dryer with various temperature (40oC, 50oC, and 60oC) and relative humidity (30%, 40%, 50% and 60%). Five drying models, namely, Newton, Henderson and Pabis, Page, Midilli-Kucuk, and Verma et al. were fitted to the drying data. The drying curve of guazuma leaves did not show a constant drying period during the drying period. The models suitability were compared base on coefficient of determination (R2), root square mean errors (RSME), and reduced mean square of deviation (X2). It was found that, among the models evaluated, the Midilli and Kucuk model is the best to describe the drying kinetics of Guazuma ulmifolia leaves. The effective moisture diffusivity was found to be in the range of 10-13 – 10-12 m2/s and the convective mass transfer coefficient was in the range of 10-9 – 10-10 m/s. The activation energy value was found to be 89.21 kJ/mol.
Highlights
Pengeringan simplisia herbal perlu dilakukan secara baik dan tepat
RH¿VLHQ SHUSLQGDKDQ PDVVD NRQYHNWLI Perilaku pengeringan daun jati belanda dapat juga dilihat dari nilai bilangan biot massa yang menggambarkan pengaruh tahanan internal dan eksternal perpindahan air dari dalam simplisia ke permukaan
Dehydration characteristics and mathematical modelling of lemon slices drying undergoing oven treatment
Summary
Redaksi Jurnal Keteknikan Pertanian mengucapkan terima kasih kepada para Mitra Bebestari yang telah menelaah naskah pada penerbitan Vol 8, No 2 Agustus 2020. Ucapan terima kasih disampaikan kepada: Dr Leopold O. S.TP, M.Si (Departemen Teknik Mesin dan Biosistem, IPB University), Prof.Dr.Ir. Usman Ahmad, M.Agr (Departemen Teknik Mesin dan Biosistem, IPB University), Dr.Ir. Soni Solistia Wirawan, M.Eng (BPPT), Prof.Dr.Ir. Sutrisno M.Agr (Departemen Teknik Mesin dan Biosistem, IPB University), Ir. Siti Mariana Widayanti, M.Si, (Balai Besar Penelitian dan Pengembangan Pascapanen Pertanian), Dr.Ir. Lilik Pujantoro, M.Agr (Departemen Teknik Mesin dan Biosistem, IPB University)
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