Table 1. Factorial Design with the Observed Results for the EO Yield and d-Limonene Concentration.

HD time (min)	water-to-solid ratio (v/w)	EO yield (%)	d-limonene concentration (%)
120	4	0.29	37.43
120	5.5	0.35	19.19
120	7	0.38	24.68
180	4	0.45	23.84
180	5.5	0.38	20.49
180	7	0.26	21.21
240	4	0.57	13.37
240	5.5	0.44	18.30
240	7	0.48	14.90
120	4	0.32	14.74
120	5.5	0.29	28.83
120	7	0.78	20.53
180	4	0.23	22.27
180	5.5	0.45	20.83
180	7	0.29	23.92
240	4	0.23	16.60
240	5.5	0.73	21.73
240	7	0.47	20.31