Table 4.

Variables and levels used in the central composite rotational design (CCRD).

Sample	CNF-1	CNF-2	CNF-3	CNF-4	CNF-5	CNF-6	CNF-7
Enzyme loading (U/g)	1.16	4.34	1.16	4.34	0.50	5.00	2.75
Solids loading (g/L)	20	20	45	45	33	33	15
Sample	CNF-8	CN-F9	CNF-10	CNF-11	CNF-12	CNF-13
Enzyme loading (U/g)	2.75	2.75	2.75	2.75	2.75	2.75
Solids loading (g/L)	50	33	33	33	33	33