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Table 6 The results of orthogonal test for glycerol concentration, pH, and C/N ratio

From: Strain screening and optimization of biohydrogen production by Enterobacter aerogenes EB-06 from glycerol fermentation

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