Table 1.

Box–Behnken design for the variables and the experimentally observed responses

Run	pH	Incubation time	Coffee pulp waste (%)	Corncobs (%)	Protease (U/mL)
1	10	60	3.00	3.00	452
2	6	96	3.00	2.00	456
3	8	60	1.00	1.00	670
4	8	60	5.00	3.00	780
5	8	60	3.00	2.00	914
6	6	60	1.00	2.00	510
7	8	24	3.00	3.00	530
8	8	60	5.00	1.00	487
9	8	24	1.00	2.00	535
10	8	96	1.00	2.00	625
11	8	96	3.00	1.00	513
12	10	60	1.00	2.00	475
13	6	60	3.00	3.00	445
14	6	60	5.00	2.00	460
15	8	96	5.00	2.00	745
16	8	96	3.00	3.00	750
17	8	60	1.00	3.00	655
18	8	60	3.00	2.00	910
19	6	24	3.00	2.00	440
20	10	96	3.00	2.00	445
21	8	60	3.00	2.00	900
22	6	60	3.00	1.00	537
23	8	60	3.00	2.00	920
24	10	60	3.00	1.00	560
25	8	60	3.00	2.00	918
26	8	24	5.00	2.00	600
27	10	60	5.00	2.00	475
28	10	24	3.00	2.00	435
29	8	24	3.00	1.00	615