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Table 3 Kinetic and statistical parameters of the proposed model

From: Enhancement of biohydrogen production rate in Rhodospirillum rubrum by a dynamic CO-feeding strategy using dark fermentation

pCO (atm) Kinetic parameter
KX, A × 103 \(K_{{{\text{X}},{\text{ CO}}_{2} }}\) K1 K2 × 103 KP × 103 ƲA/P ƲA/X Ʋ\(_{{{\text{CO}}_{2} /{\text{X}}}}\)
(g X g A−1 h−1) (g X mol CO2−1 h−1) (mol H2 g X−1 h−1) (mol CO g X−1) (g PHB g X−1 h−1) (g A g PHB−1) (g A g X−1) (g CO2 g X−1)
0.10 2.01 ± 0.51 0.13 ± 0.04 0.65 ± 0.21 1.16 ± 0.39 0.25 ± 0.04 0.76 ± 0.03
0.20 5.31 ± 0.51 0.26 ± 0.03 1.39 ± 0.16 2.18 ± 0.74 2.67 ± 0.88 0.12 ± 0.04 1.04 ± 0.17
0.40 5.76 ± 0.76 0.18 ± 0.02 1.31 ± 0.64 3.95 ± 0.74 2.66 ± 0.98 0.09 ± 0.03 0.82 ± 0.11
0.50 4.08 ± 0.54 0.34 ± 0.04 2.25 ± 0.29 7.79 ± 2.29 1.55 ± 0.45 0.04 ± 0.02 1.31 ± 0.11
0.60 5.18 ± 0.51 0.21 ± 0.01 1.51 ± 0.08 5.92 ± 0.95 2.64 ± 0.31 0.26 ± 0.03 0.87 ± 0.07
0.75 5.18 ± 0.54 0.18 ± 0.02 1.72 ± 0.16 6.03 ± 0.99 1,83 ± 0.32 0.52 ± 0.02 0.85 ± 0.14
1.00 7.74 ± 0.76 0.08 ± 0.01 1.27 ± 0.33 1.52 ± 0.11 2.69 ± 0.53 0.18 ± 0.04 0.65 ± 0.31
pCO (atm) Statistical parameter
Fcalc Ftab RMSE SSR VE (%)    
0.10 1529 2.249 0.002 2 × 10–4 91.7    
0.20 4399 2.249 0.003 6 × 10–4 96.6    
0.40 9066 2.249 0.003 5 × 10–4 98.1    
0.50 6314 2.249 0.005 1 × 10–3 97.2    
0.60 14,002 2.346 0.003 4 × 10–4 99.3    
0.75 24,872 2.249 0.003 6 × 10–4 99.1    
1.00 4426 2249 0.012 7 × 10–3 90.1