Effect of some engineering parameters on the performance of a locally made fish feed extruder [electronic resource].

Includes bibliographic reference.

Fish feed extruders performance is deeply affected by the operational conditions. Unproper operational condition cause poor quality
of feed and affect the productively of such machine, therefore, the main aim of the present work is to study the effect of some
engineering parameters (screw speed, feeding rate and die hole diameter) on the performance of a locally made feed extruder.
To achieve that, the extruder productivity, total losses percentage, energy consumption and cost per kg of feed were studied
at three different screw speeds for main motor of extruder (200, 250 and 300 rpm), three different feeding rates (70, 100 and 130 kgh-1)
and three different die hole dimeters were 3, 4 and 5 mm extruder. The results indicated that extruder productivity ranged from 62.24 at 200 rpm ,
3mm and 70 kg h-1 to 107.58 kg h-1 at 300 rpm , 5mm and 130 kg h-1 . The highest rate of the losses percentage was 4.64 % which happened
at the smallest screw speed (200 rpm), the smallest feeding rate (70 kg h-1) and the largest die hole dimeter (5mm) respectively.
The specific energy consumption ranged from 0.126 at 200 rpm , 5mm and 130 kg h-1 to 0.233 kWh kg-1 at 300 rpm , 3mm and 70 kg h-1.
The operating cost of fish feed production decreases with the increase of the screw speed, feeding rate and die hole dimeter,
the costs of extrusion processing ranged from 0.628 to 1.081 LE kg-1 of feed for all treatments under study

Summary in Arabic.