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PERFORMANCE EVALUATION OF AN INNOVATIVE FISH FEED MILL MACHINE
Abstract
The innovative fish feed pelleting machine used for the analysis consists of three distinct units; grinding,
pelleting and drying. Three feed samples of the fish feed materials- X1, X2 and X3 weighing 250g each were
prepared at different moisture contents of 7, 11, 13 and 15%. The samples were dried at a temperature of 102oC for
24hrs and weighed after cooling. Also, the samples were subjected under three machine speeds: 75, 95, 138 and
200 rpm and die diameter of 3, 4, 5 and 6 mm. The results showed that pelleting efficiencies of 94.0%, 93.2%, and
92.1% for the feed samples X1, X2 and X3 respectively were obtained at moisture contents of 7%, die hole of
3mm and speed of 75rpm. The result also revealed that the feed mixtures of X1, X2 and X3 processed at die hole
diameter of 4mm, die speed of 95rpm and moisture content of 11% gave the lowest values of throughput of 36, 38,
and 34 kg/h respectively for the machine. The feed mixture (X1) at die hole diameter of 4mm, die speed of 95rpm
and moisture content of 11% gave the highest value of pelleting durability of 85.7% among the feed mixtures
evaluated. Therefore, the performance of the innovative fish feed pelleting machine show that the machine would
help in selecting the best machine variables for different feed mixtures
