Skip to main content
Fig. 4 | Biotechnology for Biofuels

Fig. 4

From: Enhanced malic acid production from glycerol with high-cell density Ustilago trichophora TZ1 cultivations

Fig. 4

Fermentation of Ustilago trichophora TZ1 at different pH values. a OD600, b malate concentration for fermentations in MTM containing 200 g L−1 initial glycerol and 3.2 g L−1 NH4Cl at 30 °C and pH 6.5 with DO kept at 80 %. Additional 160 g glycerol was added when the concentration dropped below 50 g L−1. Colors indicate different pH values: pH 6.5 (red), 5.5 (blue), and 4.5 (green). Error bars indicate deviation from the mean (n = 2). c Distribution of molar fractions of dissociated and (partly) undissociated malate species. Shown is the relative distribution of fully dissociated (blue), partially dissociated (black) and fully undissociated (red) malate dependent on the pH value. Data were generated using CurTiPot [56]

Back to article page