Table 2: Experimental responses of the dependent variables after pretreatment using central composite design.

Run	Variable			-	Response
-	A: Time (min)	B: Temperature (°C)	C: Concentration (%)	Y1: Cellulose Recovery (%)	Y2: Hemicellulose Recovery (%)	Y3: Lignin Recovery (%)
1	60	60	50	57.487	15.220	45.903
2	120	60	50	74.779	16.727	48.612
3	60	75	50	88.874	17.418	63.182
4	90	100.23	70	95.097	21.928	63.532
5	60	60	90	80.921	10.150	44.640
6	120	60	90	83.765	19.137	50.701
7	60	75	90	100.220	15.265	62.986
8	120	90	90	88.359	29.473	63.112
9	39.55	75	70	73.056	12.741	49.193
10	140.45	75	70	99.030	19.682	56.694
11	90	49.77	70	64.434	9.5438	43.350
12	90	100.23	70	96.729	19.459	56.409
13	90	75	36.36	71.993	14.009	49.943
14	90	75	103.64	94.561	20.753	55.441
15	90	75	70	80.192	14.728	49.319
16	90	75	70	78.353	16.903	50.018
17	90	75	70	81.149	20.438	52.334
18	90	75	70	84.803	16.269	48.437
19	90	75	70	86.734	13.168	51.740
20	90	75	70	87.210	15.220	51.597