Table 6 The results of orthogonal test for glycerol concentration, pH, and C/N ratio
Factors/levels | Glycerol concentration (g/L) [A] | pH [B] | C/N ratio (g/g) [C] | YH2 (mol H2/mol glycerol) |
|---|---|---|---|---|
1 | 5 | 5 | 5/2 | 0.85 |
2 | 5 | 6 | 5/3 | 0.76 |
3 | 5 | 7 | 5/4 | 0.93 |
4 | 10 | 5 | 5/3 | 1.07 |
5 | 10 | 6 | 5/4 | 0.70 |
6 | 10 | 7 | 5/2 | 0.84 |
7 | 15 | 5 | 5/4 | 1.05 |
8 | 15 | 6 | 5/2 | 0.95 |
9 | 15 | 7 | 5/3 | 1.06 |