Table 3.

The experimental design used for comparison of CH, MW, and RF pretreatment systems.

(a) CH vs. MW Experimental Design				(b) MW vs. RF Experimental Design
Method	Temperature (ᵒC)	Rate (ᵒC/min)	Digester type	Method	Temperature (ᵒC)	Holding time (min)	Digester type
CH	80	11	Batch mesophilic	MW	60	0	Batch mesophilic
	120	6				60
		11				120
	160	3			90	0
MW	80	3				60
		6				120
	120	3			120	0
	160	6				60
		11				120
CH	80	6	Batch thermophilic	RF	60	0
		11				60
	120	3				120
	160	3			90	0
		6				60
MW	80	3				120
	120	6			120	0
		11				60
	160	11				120