Kinetic Model of Moisture Diffusivity in Soursop Leaves (Annona muricata L.) by Convection Drying

Abstract

Tea is considered to be a product that brings health benefits. The drying process showed high efficiency in processing this product. However, the process of moisture is not qdequately controlled, resulting in wasted energy in the drying process. The dynamics of the drying process of soursop leaves and the effect of temperature on the process speed were assessed in the present study. Five models (Newton, Henderson and Pabis, Page, Logarithmic, and Weibull) were used to determine the suitable drying dynamic at temperatures of 50°C, 55°C, 60°C and 65°C. The mechanism of the processing is based on the principle of dehumidification of the convection drying system with hot air, which caused the moisture inside the material to move outwards. The results showed that the drying temperature is directly proportional to the drying rate of the process, as the increase in drying temperaturefrom 50°C to 65°C produced the link breaking energy and heating thatleads to evaporation. Dehumidification rate depends on the temperature, change in Deff value as 1 x (RTa) -1 from from 9,264 95 × 10−9 m/s2 to 9.76485 × 10−9 m/s2. Page model with determination coefficient R2> 0.99 was found to be the most suitable model for experimental data.

Study of jelly drying cashew apples (Anacardium occidentale L.) processing

“…According to the results, the concentrations of TAA and TPC at different temperatures were statistically different at the 95% confidence level ( p < .05). Observed from the graph, it can be seen that temperature and biological activity are negatively correlated, which is consistent with the results of previous studies (Nhi et al., 2020). The highest content of polyphenols can be seen at the drying temperature of 55°C (3.59 ± 0.05 mgGAE/gDW), a decrease of 20.24% compared to the post‐permeation sample (4.50 ± 0.44 mgGAE/gDW).…”