Moisture adsorption isotherm of whole dried sea cucumber (Actinopygamiliaris)

Date

2013

Degree

Bachelor of Science in Agricultural Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Kevin F. Yaptenco

Abstract

This study was conducted to determine the adsorption isotherm of Actinopyga miliaris that is needed to improve the drying and storage processes of dried sea cucumber. The samples were analyzed at 30, 45 and 60°C and 11%-50% ERH using dynamic gravimetric method for EMC determination. The samples reached equilibrium after a week for 11%-20% and after four weeks at 30%-50%. Duncan multiple range test done showed that there is a significant difference in EMC as affected by temperature however no trend was observed by replication which indicates differences in the equipment used and by ERH indicating that increasing ERH increases EMC. It was found that GAB model best described the behavior of the product. It can be classified as a Type II isotherm. The shelf life of the samples packed in 35.7, 43.5 and 52.5μm polyethylene film was estimated from the best model obtained. The experimental MC varied more or less 1-2 days than the calculated time before the samples reached 50% RHi which are 2, 9 and 5 days for 35.7, 43.5 and 52.5μm, respectively. The equation used provided an acceptable estimation of the shelf life of the product. Moisture content was also predicted over time and was compared to the actual MC obtained by the samples. The predicted values are far from the experimental values for 35.7μm and relatively close for 43.5 and 52.5μm. The equation used would not give a good estimate of the product?s MC though time because of the shifts in the actual storage conditions.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

Thesis

Document Type

Thesis

This document is currently not available here.

Share

COinS