Table 8.

Confirmation experiments of CCD (RSM) model for Rhodobacter capsulatus-PK (SS-8) and enzymatically hydrolyzed WS

X1(h)	X2(mg)	X3(g)	H2production (ml)
			actual	predicted	residual	error (%)
48	300	2.00	708.34	710.25	-1.91	0.27
24	300	2.50	611.23	605.61	5.62	0.92
48	400	2.00	673.12	666.31	6.81	1.01
48	300	2.50	651.05	649.55	1.50	0.23
50	320	2.20	697.47	698.94	-1.47	0.21
40	280	1.70	683.09	681.15	1.94	0.28

X₁ = inoculum age;

X₂ = nitrogen content;

X₃ = substrate loading.