Fig. 4

Glucose consumption and hydrogen and cells productivities versus thiosulfate concentrations. Hydrogen productivities (QH₂) and glucose consumptions (Qglu) were expressed in mmol per liter of medium and per hour. T. maritima cells productivities (Qcells) were expressed in mg per liter of medium and per hour. These fermentation parameters were calculated during the growth phase from fermentation runs performed in bioreactor (in triplicate). For all fermentations, culture medium contained glucose (60 mmol L⁻¹) and yeast extract (1 g L⁻¹)