Research Article
Biological Pretreatment by Solid-State Fermentation of Oat Straw to Enhance Physical Quality of Pellets
Table 3
Coefficient values of the fitting model for different responses of oat straw pellets pretreated with TV52J.
| Response variable | Source | | Sum of squares | Mean squares | value | value |
| Density 0 | Model | 14 | 8079.23 | 577.09 | 7.56 | 0.0003 | | 1 | 1664.51 | 1664.51 | 21.81 | 0.0004 | | 1 | 3352.36 | 3352.36 | 43.93 | <0.0001 | | 1 | 365.19 | 365.19 | 4.79 | 0.0462 | | 1 | 462.25 | 462.25 | 6.06 | 0.0275 | | 1 | 639.33 | 639.33 | 8.38 | 0.0118 | | 1 | 1266.17 | 1266.17 | 16.59 | 0.0011 | Lack of fit | 10 | 975.30 | 97.53 | 4.19 | 0.0900 | Density 1 | Model | 14 | 7815.07 | 558.22 | 2.84 | 0.0304 | | 1 | 4384.98 | 4384.98 | 22.28 | 0.0003 | | 1 | 1294.49 | 1294.49 | 6.58 | 0.0225 | Lack of fit | 10 | 923.37 | 92.34 | 0.50 | 0.8297 | Dimensional stability | Model | 14 | 16.66 | 1.19 | 2.80 | 0.0318 | | 1 | 2.91 | 2.91 | 6.86 | 0.0202 | | 1 | 2.22 | 2.22 | 5.23 | 0.0383 | | 1 | 3.09 | 3.09 | 7.28 | 0.0173 | | 1 | 3.90 | 3.90 | 9.18 | 0.0090 | Lack of fit | 10 | 4.41 | 0.44 | 1.15 | 0.4846 | Tensile strength | Model | 14 | 0.042 | 0.003 | 3.64 | 0.0107 | | 1 | 0.004 | 0.004 | 4.79 | 0.0460 | | 1 | 0.027 | 0.027 | 32.81 | <0.0001 | | 1 | 0.004 | 0.004 | 5.30 | 0.0371 | Lack of fit | 10 | 0.009 | 0.0009 | 1.27 | 0.4421 |
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