Table 2.
Experimental data of wheat bran ground and classified under different conditions based on full factorial design for response surface analysis.
| Coded level1) | Fine fraction | Coarse fraction |
|
|
| X1 | X2 | X3 | Crude protein (%) | Crude ash (%) | Crude fat (%) | Total starch (%) | Crude protein (%) | Crude ash (%) | Crude fat (%) | Total starch (%) |
| -1 | -1 | -1 | 16.54±0.13 | 4.62±0.02 | 5.93±0.15 | 24.72±0.25 | 12.48±0.04 | 3.72±0.05 | 4.65±0.12 | 13.64±0.18 |
| 0 | 17.65±0.12 | 4.77±0.08 | 5.93±0.12 | 23.39±0.21 | 12.85±0.02 | 3.97±0.04 | 4.88±0.11 | 12.48±0.14 |
| 1 | 16.10±0.11 | 4.31±0.07 | 5.60±0.11 | 22.90±0.17 | 12.98±0.07 | 3.82±0.04 | 4.65±0.13 | 12.45±0.11 |
|
| 0 | -1 | 17.49±0.17 | 4.30±0.08 | 5.80±0.14 | 30.75±0.13 | 13.02±0.10 | 4.24±0.03 | 4.56±0.07 | 13.37±0.24 |
| 0 | 17.18±0.14 | 4.25±0.08 | 5.82±0.11 | 29.42±0.14 | 13.27±0.13 | 4.17±0.05 | 4.58±0.12 | 13.42±0.17 |
| 1 | 16.73±0.13 | 4.11±0.07 | 5.63±0.11 | 28.12±0.21 | 13.53±0.09 | 4.24±0.02 | 4.58±0.09 | 13.85±0.23 |
|
| 1 | -1 | 17.01±0.12 | 4.25±0.07 | 5.75±0.13 | 30.94±0.18 | 13.56±0.12 | 4.11±0.01 | 4.66±0.11 | 12.94±0.14 |
| 0 | 17.21±0.14 | 4.29±0.03 | 5.77±0.14 | 30.86±0.10 | 13.50±0.13 | 4.14±0.04 | 4.68±0.07 | 12.76±0.09 |
| 1 | 17.12±0.13 | 4.08±0.02 | 5.52±0.14 | 30.39±0.11 | 13.61±0.11 | 4.23±0.01 | 4.69±0.04 | 13.16±0.17 |
|
| 0 | -1 | -1 | 16.26±0.15 | 4.73±0.07 | 5.88±0.13 | 24.91±0.13 | 12.17±0.10 | 3.56±0.02 | 4.63±0.13 | 14.68±0.24 |
| 0 | 16.85±0.12 | 4.79±0.03 | 5.97±0.09 | 25.78±0.11 | 12.60±0.11 | 3.75±0.03 | 4.77±0.12 | 12.72±0.11 |
| 1 | 16.40±0.11 | 4.63±0.03 | 5.73±0.14 | 22.81±0.14 | 12.35±0.14 | 3.80±0.05 | 4.74±0.07 | 11.65±0.13 |
|
| 0 | -1 | 16.73±0.14 | 4.62±0.04 | 5.85±0.05 | 27.82±0.10 | 12.86±0.11 | 3.66±0.04 | 4.86±0.04 | 15.56±0.23 |
| 0 | 17.33±0.10 | 4.66±0.06 | 6.00±0.14 | 27.07±0.07 | 12.97±0.13 | 3.66±0.07 | 5.05±0.08 | 13.39±0.21 |
| 1 | 16.28±0.14 | 4.33±0.03 | 5.79±0.04 | 24.77±0.09 | 12.66±0.10 | 3.70±0.05 | 4.93±0.11 | 12.10±0.25 |
|
| 1 | -1 | 17.11±0.11 | 4.48±0.07 | 5.65±0.12 | 30.42±0.12 | 14.08±0.09 | 3.68±0.04 | 5.01±0.07 | 16.83±0.17 |
| 0 | 16.89±0.13 | 4.45±0.01 | 5.62±0.10 | 28.81±0.14 | 13.37±0.14 | 4.05±0.03 | 4.95±0.05 | 14.42±0.23 |
| 1 | 16.59±0.09 | 4.29±0.05 | 5.50±0.14 | 28.70±0.11 | 13.45±0.10 | 4.16±0.01 | 5.00±0.04 | 14.10±0.22 |
|
| 1 | -1 | -1 | 17.41±0.14 | 4.58±0.01 | 5.62±0.07 | 29.01±0.13 | 12.16±0.08 | 3.51±0.05 | 5.00±0.11 | 11.79±0.21 |
| 0 | 16.54±0.11 | 4.57±0.04 | 5.67±0.13 | 27.94±0.11 | 12.92±0.11 | 3.56±0.07 | 4.94±0.13 | 11.73±0.17 |
| 1 | 16.47±0.13 | 4.49±0.01 | 5.50±0.03 | 22.47±0.07 | 11.87±0.10 | 3.65±0.02 | 5.04±0.10 | 9.35±0.18 |
|
| 0 | -1 | 16.99±0.10 | 4.65±0.04 | 5.69±0.07 | 29.85±0.03 | 13.38±0.13 | 3.83±0.08 | 4.93±0.09 | 13.83±0.22 |
| 0 | 17.65±0.10 | 4.72±0.07 | 5.76±0.03 | 26.50±0.12 | 12.88±0.12 | 3.84±0.04 | 5.01±0.10 | 13.34±0.20 |
| 1 | 16.87±0.12 | 4.60±0.03 | 5.58±0.11 | 26.00±0.21 | 12.89±0.05 | 3.91±0.04 | 4.89±0.11 | 12.6±0.07 |
|
| 1 | -1 | 17.38±0.13 | 4.53±0.02 | 5.73±0.13 | 27.45±0.08 | 13.59±0.10 | 4.00±0.07 | 4.70±0.13 | 14.20±0.24 |
| 0 | 17.12±0.11 | 4.37±0.05 | 5.67±0.15 | 28.64±0.24 | 13.33±0.07 | 4.05±0.03 | 4.56±0.11 | 13.15±0.13 |
| 1 | 16.76±0.14 | 4.36±0.03 | 5.43±0.13 | 28.64±0.19 | 13.38±0.04 | 4.05±0.04 | 4.69±0.14 | 12.15±0.15 |
X1: Mill speed (rpm), X2: Separator reverse wheel speed (rpm), X3: Air classifier reverse wheel speed (rpm).