Fig. 6.

Fermentation of Ustilago trichophora TZ1 with crude glycerol. Malate concentration (red, squares), glycerol concentration (blue, circles) and OD₆₀₀ (green, triangles) in MTM containing 200 g L⁻¹ crude glycerol, 3.2 g L⁻¹ NH₄Cl at 28 °C (37 °C during production phase, 48 h) with DO kept at 30 %. pH was kept at 6.5 by automatic addition of NaOH. Shown is one exemplary fermentation run