Table 2 Automatic feeder efficiency at different feed pellets sizes, air flow rates and rotational speeds of screw.
From: Evaluation of fish feeder manufactured from local raw materials
Feed pellets size, mm | Flow rate, m3 m−1 | Rotational speed of screw, rpm | Mean | ||||
|---|---|---|---|---|---|---|---|
180 | 360 | 540 | 720 | 900 | |||
Efficiency of automatic feeder, % | |||||||
1 | 10 | 37.03 | 47.02 | 62.26 | 60.76 | 62.47 | 53.91a |
15 | 54.26 | 55.08 | 73.01 | 72.82 | 70.97 | 65.23b | |
20 | 76.07 | 69.20 | 82.18 | 76.30 | 80.14 | 76.78c | |
Mean | 55.79a | 57.10a | 72.48b | 69.96b | 71.19b | ||
2 | 10 | 39.96 | 58.29 | 75.21 | 70.66 | 71.56 | 63.14b |
15 | 55.17 | 67.45 | 80.83 | 79.87 | 78.93 | 72.45bc | |
20 | 78.82 | 80.38 | 89.39 | 86.47 | 84.39 | 83.89d | |
Mean | 57.98a | 68.71b | 81.81c | 79.00b | 78.29b | ||
3 | 10 | 47.11 | 70.29 | 78.08 | 78.22 | 79.77 | 70.69b |
15 | 66.17 | 80.01 | 84.99 | 88.21 | 86.55 | 81.19cd | |
20 | 94.95 | 95.04 | 95.32 | 93.99 | 93.41 | 94.54e | |
Mean | 69.41b | 81.78bc | 86.13c | 86.81c | 86.58c | ||
Mean of size (A) | 65.30a | 73.16b | 82.14c | ||||
Mean of flow rate (B) | 62.58a | 72.95b | 85.07c | ||||
Mean of speed (C) | 61.06a | 69.20b | 80.14c | 78.59c | 78.69c | ||
LSD at 0.05 | A | B | C | AB | AC | BC | ABC |
5.28 | 6.03 | 6.57 | 7.11 | 8.62 | 6.95 | N.S | |