Optimization and modeling of the drying characteristics of janitor fish (Pterygoplichtys disjunctivus).

Date

10-2008

Degree

Bachelor of Science in Agricultural Engineering

Major Course

Major in Agricultural and Bio-Process Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Edgardo V. Casas

Committee Member

Engelbert K. Peralta, Jessie C. Elauria

Abstract

The determination of the drying characteristics of the janitor fish was done using the regression surface analysis and Box and Behnken design resulting in 15 runs. The samples were subjected to drying air temperature of 50°C, 60°C and 70°C, 0.21m/s 0.24m/s and 0.27 m/s air velocity, and cuts 1, 2 and 3. The responses observed were average drying rate, final moisture content, rehydration rate, rehydration ratio and moisture ratio. Analysis of variance showed that only the drying rate of the sample was significant to air temperature at 95% level. All the other dependent parameters were insignificant due to the restriction of the surface exposed on each cut and the thick scales of the samples. Using the superimposed contour plots of the dependent variables, the optimum condition were determined to be 62.5°C, 0.24 m/s and 2 cuts. Optimum values observed were compared with the predicted values and showed less than 20% error and could then be concluded acceptable. The moisture ratio data were then considered to obtain the model for the drying characteristic of the janitor fish. Using curve expert 1.3, the best fit equation was observed at run 11 and could be expressed as MR = 0.42 + 0.78cos (0.0011 + 0.78) where MR = moisture ratio, dimensionless and t = drying time, minutes an expression that can be predict the moisture at any drying time, t.

Language

English

LC Subject

Drying.

Location

UPLB College of Engineering and Agro-Industrial Technology

Call Number

LG 993.5 2008 A2 A73

Document Type

Thesis

This document is currently not available here.

Share

COinS