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Quality Assessment of Rotating and Solar Tunnel Dried Marine Fish Product

S. Sultana
Department of Fisheries Technology, Bangladesh Agricultural University Mymensingh 2202, Bangladesh

M.I. Hossain
Department of Fisheries Technology, Bangladesh Agricultural University Mymensingh 2202, Bangladesh

F.H. Shikha
Department of Fisheries Technology, Bangladesh Agricultural University Mymensingh 2202, Bangladesh

M.N. Islam
Department of Fisheries Technology, Bangladesh Agricultural University Mymensingh 2202, Bangladesh

M. Kamal
Department of Fisheries Technology, Bangladesh Agricultural University Mymensingh 2202, Bangladesh

Abstract/ Executive Summary:

Studies were conducted to evaluate the quality aspects of marine dried fish i.e. silver jew fish (Johnius argentatus), Bombay duck (Harpodon nehereus) and ribbon fish (Trichiurus haumela) products produced in rotating and solar tunnel dryers. On the basis of organoleptic characteristics such as colour, odour, texture, broken pieces, insect infestation and overall quality, four member panels of experts evaluated the quality of the dried products obtained from both rotating and solar tunnel dryers and all the products were found in acceptable quality. Reconstitutions properties of samples were in the range of 51.05 to 98.75% for the dried fish produced in rotating dryer, while 24.64 to 76.76% for dried fish produced in solar tunnel dryer. The highest reconstitution rate was found in dried silver jew fish and lowest in ribbon fish produced in rotating dryer. On the other hand, the highest reconstitution was observed in dried silver jew fish and lowest in dried Bombay duck produced in solar tunnel dryer. Proximate composition such as moisture, crude protein, lipid and ash content of the dried fish muscles produced in rotating dryer ranged from 16.36% to 19.1%, 62.35% to 67.37%, 6.37% to 10.75% and 7.00% to 8.05%, respectively and in solar tunnel dried fish products, they were in the range of 14.05% to 19.71%,57.64% to 69. 21%,6.92% to 15.40%and 7.69% to 8.80 %, respectively. The TVBN values of dried fish products obtained from rotating dryer were in the range of 15.02 to 19.05 mg/100g, while in solar tunnel dried fish products, the values were in the range of 15.46 to 19.21 mg/100g. The results of the studies indicated that dried fish produced from both rotating and solar tunnel drier were acceptable quality in terms of organoleptic and food quality aspects.

Keywords: Rotating dryer, Solar tunnel dryer, Marine dried products

Location: Department of Fisheries Technology, Bangladesh Agricultural University, Mymensingh.

Start Date: 00-00-2006

End Date: 00-00-2006

Program Area: Postharvest and Agro-processing

Commodity: Marine fish

Objectives:

To evaluate the quality aspects of marine dried fish i.e. silver jew fish (Johnius argentatus), Bombay duck (Harpodon nehereus) and ribbon fish (Trichiurus haumela) products produced in rotating and solar tunnel dryers.

Methodology:

Sample collection: Three fresh marine fish samples namely silver jew fish (Johnius argentatus), Bombay duck (Harpodon nehereus) and ribbon fish (Trichiurus haumela) were collected from a local fish market of Chittagong and transported to the laboratory of Department of Fisheries Technology, Bangladesh Agricultural University, Mymensingh in an insulated box in ice (1: 1). Organoleptic quality assessment: The evaluation of organoleptic quality of dried fish is based on the method currently used by Fish Inspection and Quality Control (FIQC) of Department of Fisheries (DoF), Government of Bangladesh with slight modification. Representative whole sample of dried products were taken on a tray to assess the organoleptic characteristics such as colour, odour, texture, broken pieces and insect infestation by a four member panels of experts constituted in the Department of Fisheries Technology, BAU, Mymensingh. Physical study (Water reconstitution properties): Five gram of dried fish muscle sample put into a nylon net and allowed to soak in one liter of water in water bath at different temperature for a period of maximum of 60 minutes with occasional stirring. When the samples were taken out from the water bath, water was drained off through a coarse nylon net. All the muscle fleshes were then transferred to the strainer and extraneous water was wiped off by a piece of blotting paper. Then the fleshes were weighed again. The gain of moisture for each sample was calculated as percent reconstitution. The reconstitution behavior was measured in water temperature at 20^oc, 40^oC, 60^oC and 80^oC. Reconstitution percentage was measured at 15 minutes intervals for each temperature. Evaluation of nutritional quality: Proximate composition analysis of moisture, ash, lipid and crude protein were carried out according to the standard methods. Total volatile base nitrogen was determined.

Source of Information: Bangladesh J. Fish. Res., 12(1 ), 2008: 121-128

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Solar tunnel dryer and rotating dryer constructed using locally available materials at a low cost were found suitable for production of high quality dried fish products. Rotating dryer was found most effective to run uninterruptedly in all weather conditions.

Knowledge Management: Journal