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Fig. 4 | Biotechnology for Biofuels

Fig. 4

From: Redox dependent metabolic shift in Clostridium autoethanogenum by extracellular electron supply

Fig. 4

Metabolic profiles of heterotrophic anaerobic fermentations of C. autoethanogenum in the absence (a control) and in the presence of the three mediators b [Co(sep)]3+, c [Co(AMMEsar)]3+ and d [Co(trans-diammac)]3+. Concentration of the mediators was 1 mmol/L, and a constant potential of −0.603 V (vs SHE) was applied throughout the experiment. Control fermentations were performed in the same reactor set up with electrodes at open circuit. Shown data are average values of triplicate fermentations with error bars displaying the corresponding standard deviations. *Fermentation times are adjusted to time zero = start of fructose consumption as varying lag-phases in the presence of the mediators were observed. 2,3-BDO 2,3-butanediol, OD optical density

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