Fig. 4

Fermentation results of C. acetobutylicum XY16 (pSADH) under different CaCO₃ concentrations. Cells were grown in serum bottles with 60 g/L glucose for 72 h (a). The profiles of C. acetobutylicum XY16 (pSADH) in batch fermentation under 10 g/L CaCO₃ (b)