Fig. 7. The effects of Mn2+ concentration in culture medium with food wastes on productivity of lactic acid. MnSO4 was added to culture medium with food wastes, which naturally contained 14.1 lM manganese, +0 lM (d), +20 lM (s), +100 lM (j), and +200 lM (h) as Mn2+.
The fermentations were carried out with pH control at 5.0.