​​January 2021, Vol. 6, No. 1, pp. 15-22. 

​​​Performance Evaluation of a Locally Developed Single Screw Floating Fish Feed Extruder

O.S. Ogundana¹, A. Oyerinde², A.P. Olalusi², T.W. Owa³
¹Department of Agricultural Technology, Farm Mechanization Unit, Federal College of Freshwater Fisheries Technology, P. M. B. 1500, New Bussa, Nigeria.
²Department of Agricultural and Bio-environmental Engineering, Federal University of Technology Akure, P. M. B 704, Akure, Nigeria.

³Ondo State Fadama Coordination Office, Alagbaka, P.M.B 755 Akure, Nigeria.

​​​*Corresponding author’s e-mail:odunmansam@gmail.com  

​Abstract

​The locally developed floating fish feed extruder was evaluated for performance in terms of machine parameters such as; screw speeds (158.5, 225 and 334 rpm), die size (4, 6 and 8 mm) and moisture content of feed materials (20, 30, 40 and 50%), on specific mechanical energy requirements, expansion ratio, bulk density and pelleting efficiency were determined. The research results showed that increasing the screw speed from 158.5 to 225 rpm incline to increase extrusion efficiency from 64 % to 68 %, decrease in bulk density from 1.05 to 0.95 g/cm3; decrease in specific mechanical energy from 26.40 to 24.20 kj/kg. By enlarging the die size from 3 mm to 5 mm, the specific mechanical energy incline to reduce from 28.40 to 26.60 kJ/kg, reduce bulk density from 1.05 to 0.95 g/cm3, increase extrusion efficiency from 64.00 to 68.00%. Increase in moisture content from 20 % to 30 % tend to reduce the specific mechanical energy from 28.40 to 26.60 kj/kg, reduce bulk density from 1.05 to 1.00 g/cm3, and increase the extrusion efficiency from 64.00 to 72.00 %.

Keywords: Extruder; Mixer; Fish Feed; Floating; Performance; Temperature.

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ISSN 2456-0235

International Journal of Modern Science and Technology

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