Table 3.

CCD-RSM used to optimize vetiver grass xylan hydrolysis

Run	Code level		Actual level		Reducing sugar (mg 100 mg xylan−1)
	X 1	X 2	Enzyme content (U g xylan−1)	Incubation time (h)
1	+1	+1	34	120	21.15
2	+1.414	0	37.31	96	21.52
3	+1	−1	34	72	23.26
4	0	−1.414	26	62.06	21.06
5	−1	−1	18	72	21.03
6	−1.414	0	14.69	96	20.13
7	−1	+1	18	120	21.35
8	0	+1.414	26	129.94	21.38
9	0	0	26	96	23.38
10	0	0	26	96	23.78
11	0	0	26	96	23.44
12	0	0	26	96	23.87