Effect of Oxygen and Redox Potential on Glucose Fermentation in Thermotoga maritima under Controlled Physicochemical Conditions

Table 2

Batch balance for Thermotoga maritima grown on BM under anoxic conditions including the oxidative period.

Phase	Oxygen addition	Glucose consumed (mM)	Biomass (mg cdw L^−1)	Fructose produced (mM)	End products of metabolism (mM)						Carbon balance (%)
					Acetate	Lactate	Alanine	EPS	CO2	H2
Growth	−	5.46	81.4 ± 17	1.10	5.60	0.91	0.7 ± 0.2	1.22 ± 0.7	6.53	9.91	111.4 ± 19
Oxidative stationary growth	+	4.86	−	0.71	2.52	1.96	0.1 ± 0.2	nd	5.13	3.22	70.7 ± 18
Stationary growth	−	8.30	−	0.00	10.15	2.58	0.5 ± 0.2	nd	8.63	18.62	76.3 ± 13
Overall fermentation		19.3	81.4 ± 17	1.81	18.27	5.45	1.3 ± 0.2	1.22 ± 0.7	20.29	31.75	88.7 ± 11

Fermentation runs were conducted at 80°C under anoxic conditions using the BM.
Growth phase (0–14 h); oxidative stationary growth phase (14–44.6 h); anoxic stationary growth phase (44.6–114.2).
cdw: cell dry weight.
EPS: Extracellular polysaccharides.