Modelling moisture sorption Isotherms of taro (Colocasia esculenta L. Schott) at different temperatures
Date
4-2013
Degree
Bachelor of Science in Food Technology
College
College of Agriculture and Food Science (CAFS)
Adviser/Committee Chair
Al Kaixer G. Ancheta
Abstract
Modeling moisture sorption isotherms is vital during drying, processing and postharvest storage. In this study, the equilibrium moisture contents (EMC) of gabi at different temperatures 12°C, 25°C and 45°C were determined. These were used in plotting the adsorption and desorption isotherms of gabi. Results have shown sigmoidal isotherms for both adsorption and desorption. Samples exposed at 12°C have been found to have the lowest EMC as compared to those samples at temperatures 25°C and 45°C. The moisture sorption data was fitted to 7 models: (1) BET, (2) GAB, (3) Halsey, (4) Oswin, (5) Smith, (6) Henderson, (7) Chung and Pfost. Oswin and Smith models have shown the best fit with regression coefficient values (R2) ranging from 0.94 to 0.99 and 0.86 to 0.99 respectively. The monolayer value of the sample was calculated using BET and GAB models. Calculated monolayer values from both BET and GAB equations were 5.06-9.67 and 5.70-9.74 respectively. Statistical T-test has shown no significant difference from the two sets of data. Hysteresis phenomenon has been observed by plotting adsorption and desorption isotherms on the same graph.
Language
English
Location
UPLB Main Library Special Collections Section (USCS)
Call Number
LG 993.5 2013 F61 /L37
Recommended Citation
Lara, Grace Rona, "Modelling moisture sorption Isotherms of taro (Colocasia esculenta L. Schott) at different temperatures" (2013). Undergraduate Theses. 2740.
https://www.ukdr.uplb.edu.ph/etd-undergrad/2740
Document Type
Thesis