Mathematical Modeling for Drying of whole Leaf Aloe Vera (Aloe Barbadensis Miller)

Abstract

The present work aimed to study the effects of different drying methods in terms of drying behavior, drying rate and mathematical modelling of drying process for whole leaf Aloe vera. Open yard sun drying, hot air drying and dehumidified air drying were taken as different drying methods. The whole leaf Aloe vera slices took 20 h to dry under open yard sun drying, 16 h in case of hot air drying, 11 h in dehumidified air drying having initial moisture content ranging from 3115.43% (d.b.) to a final moisture content of 8.6% (d.b.). The different thin layer drying models were applied on the experimental moisture loss data with respect to time to predict the drying pattern properly. On the basis of coefficient of determination (0.9764) and standard error (0.0552), the Page model showed better fit.

U ovom radu su predstavljeni uticaji različitih metoda sušenja na postupak sušenja, intenzitet sušenja i matematičko modeliranje procesa sušenja celog lista Aloe vera. Sušenje na suncu, sušenje vrelim vazduhom i sušenje suvim vazduhom su ispitivani kao različiti postupci sušenja. Ceo list Aloe vera se sušio 20 h pod suncem na otvorenom, 16 h vrelim vazduhom i 11 h suvim vazduhom, sa početne vlažnosti od 3115.43% na konačni sadržaj vlage od 8.6%. Primenjeni su različiti modeli sušenja tankog sloja na eksperimantalne rezultate gubitka vlage i vremena sušenja, da bi se pravilno predvideo postupak sušenja. Na osnovu koeficijenta determinacije (0.9764) i standardne greške (0.0552), najbolje slaganje pokazao je Page model.