Research Article
In Situ Transesterification of Spirulina Microalgae to Produce Biodiesel Using Microwave Irradiation
Table 6
ANOVA for Response Surface Quadratic Model.
| Source | Sum of squares | Df | Mean square | value | value | |
| Model | 5464.62 | 9 | 607.18 | 170.10 | <0.0001 | Significant | , catalyst concentration | 682.05 | 1 | 682.05 | 191.07 | <0.0001 | | , volume of methanol | 19.82 | 1 | 19.82 | 5.55 | 0.0402 | | , time | 640.17 | 1 | 640.17 | 179.34 | <0.0001 | | | 97.99 | 1 | 97.99 | 27.45 | 0.0004 | | | 71.41 | 1 | 71.41 | 20.01 | 0.0012 | | | 4.41 | 1 | 4.41 | 1.23 | 0.2925 | | 2 | 743.91 | 1 | 743.91 | 208.40 | <0.0001 | | 2 | 2976.89 | 1 | 2976.89 | 833.96 | <0.0001 | | 2 | 859.35 | 1 | 859.35 | 240.74 | <0.0001 | | Residual | 35.70 | 10 | 3.57 | | | | Lack of fit | 17.15 | 5 | 3.43 | 0.9247 | 0.5332 | Not significant | Pure error | 18.55 | 5 | 3.71 | | | | Cor. total | 5500.32 | 19 | | | | |
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