Research Article
Optimization of the Alkaline Pretreatment of Rice Straw for Enhanced Methane Yield
Table 4
ANOVA for the response surface quadratic model.
| | Source | Statistics | | Sum of squares | df | Mean square | -value | Prob > |
| | Model | 17714.58 | 9 | 1968.29 | 18.86 | 0.0004 | | 1885.66 | 1 | 1885.66 | 18.07 | 0.0038 | | 345.74 | 1 | 345.74 | 3.31 | 0.1115 | | 5807.45 | 1 | 5807.45 | 55.66 | 0.0001 | | 14.48 | 1 | 14.48 | 0.14 | 0.7205 | | 1005.94 | 1 | 1005.94 | 9.64 | 0.0172 | | 80.34 | 1 | 80.34 | 0.77 | 0.4093 | | 5322.85 | 1 | 5322.85 | 51.01 | 0.0002 | | 1172.85 | 1 | 1172.85 | 11.24 | 0.0122 | | 1318.90 | 1 | 1318.90 | 12.64 | 0.0093 | | Residual | 730.41 | 7 | 104.34 | — | — | | Lack of fit | 76.94 | 3 | 25.65 | 0.16 | 0.9199 | | Pure error | 653.47 | 4 | 163.37 | — | — | | Cor Total | 18444.99 | 16 | — | — | — |
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