Table 2 Box-Behnken test design for enzyme production from wheat Bran by A. niger fermentation.

From: Optimization of Aspergillus Niger fermentation for enzyme production and enzymatic hydrolysis of wheat bran for total ferulic acid via RSM

Factors

Level

-1

0

1

Fermentation time X1/d

2

3

4

Inoculation amount X2/%

9

10

11

Carbon source concentration X3/%

0.96

1.28

1.6

Nitrogen source concentration X4/%

0.96

1.28

1.6

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