Drying janitor fish for feeds in Laguna lake to mitigate pollution potentials

Issue Date

12-2010

Abstract

The determination and optimization of drying characteristics of the janitor fish was studied using the regression surface methodology. Fish samples were subjected to drying air temperature of 50 ˚C, 60 ˚C, and 70 ˚C; 0.21, 0.24, and 0.27 msˉ¹ 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. The drying rate of the sample was significant to air temperature at 9.5% 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. Response surface regression yielded the optimum condition for drying janitor fish 70 ˚C, 0.27 msˉ¹ and 3 cuts. Optimum values observed were compared with the predicted values after verification trials and found acceptable due to lower percent errors. Harvesting, drying, and milling janitor fish for feeds can eliminate the pollution potentials of janitor fish. The polynomial equation that follows describes the drying model in terms of moisture ratio (MR) as a function of drying time (x):

MR=0.99 - 0.0006x + 9.018x²ˉˉ1.88eˉ⁰⁰⁹x³+8.28eˉ⁰¹³x⁴

Source or Periodical Title

Journal of Environmental Science and Management

ISSN

0119-1144

Volume

13

Issue

2

Page

27-43

Document Type

Article

College

School of Environmental Science and Management (SESAM)

Frequency

semi-annually

Physical Description

tables, graphs, pictures

Language

English

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