DEVELOPMENT OF AN SMALL EXPRESSION MACHINE TO PURPOSE PRODUCTION OF FISH FEED PELLETS

El-Khateeb, Hamada; Drees, A.M.; Abd El-Aty, S.K.

doi:10.21608/mjae.2008.190273

DEVELOPMENT OF AN SMALL EXPRESSION MACHINE TO PURPOSE PRODUCTION OF FISH FEED PELLETS

Document Type : Original Article

Authors

¹ Senior Researcher, Agric. Eng. Res. Inst.,(AEnRI),Dokki, Egypt.

² Agric. Eng. Dept., Fac. Agric., Assiut Branch, Al-Azhar Univ., Egypt.

³ Researcher, Agric. Eng. Res. Inst.,(AEnRI), El-Giza, Egypt.

10.21608/mjae.2008.190273

Abstract

Field experiment were carried during 2007 at the Sakha Aquaculture Research Station, Kafr El-Sheikh, Governorate, to evaluate the feasibility of using a small expression machine for oil extraction to suit production of fish feed pellets. The effect of some parameters such as, screw speeds (1.50, 1.90, and 2.25 m/s), moisture content of ration (12.8, 16.5, and 22.0 % ), screw pitch (50.0 and 80.0 mm) and two different die shape (Perforated Cylinder - Internal Cone) on energy requirements, machine productivity, pellets bulk density, pellets durability, floating time and pelleting efficiency.
The obtained results showed that increasing screw speed from (1.50, 1.90,and 2.25 m/s) tends to increase machine productivity from ( 0.31, 0.37, and 0.47 ton/h), pellets durability from (92.5, 93.4, and 95.66 %), floating time from (270, 295, and 330 min.) and pelleting efficiency from (96.4, 97.2, and 98.4 %), respectively. And decreasing energy requirements from ( 9.27, 8.59 and 7.45 kW.h/ton), and pelleting bulk density from (0.96, 0.81 and 0.74 gm/cm³), respectively.
Increasing ration moisture content from ( 12.8, 16.5, and 22.0 %) led to increase energy requirements from ( 7.31, 7.95 and 9.27 kW.h/tom), floating time from (240, 250, and 270 min.) and pelleting durability from (92.50, 93.40, and 95.66 %), respectively. And decreasing machine productivity from (0.31, 0.26, and 0.23 ton/h), pellets bulk density from ( 0.96, 0.90, and 0.86 gm/cm³) and pellets efficiency
from (98.4, 97.9, and 97.2 %), respectively.

Main Subjects

Processing Engineering of Agricultural Products

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