Figure 7

Acid accumulation and ABE production by C. beijerinckii 8052 culture challenged with furfural (2 g/L) at the solventogenic phase. Fermentation was monitored for 4h during which samples were collected every hour for analysis post-furfural challenge. Monitoring was sustained until it was evident that the fermentation has terminated (40 h). Quantified parameters include acetone (A), butanol (B), ethanol (C), acetic acid (D), and butyric acid (E).