Table 4 Results of optimization by desirable function of RSM with the best thickness of 2 mm and microwave power of 300 W.
From: Qualitative, energy and environmental aspects of microwave drying of pre-treated apple slices
Pretreatment | Time (min) | SEC (MJ/kg) | Energy efficiency (%) | Thermal efficiency (%) | Color difference | Shrinkage (%) | Desirability |
|---|---|---|---|---|---|---|---|
Control | 50.55 | 4.37 | 52.44 | 43.41 | 31.13 | 70.11 | 0.921 |
Ultrasonication | 39.44 | 3.37 | 55.40 | 45.50 | 22.73 | 59.42 | 0.935 |
Blanching | 31.55 | 3.42 | 57.97 | 49.07 | 27.56 | 64.81 | 0.916 |
