Cell growth, ABE production and furfural reduction after challenging C. beijerinckii 8052 with furfural at the acidogenic phase. Following 8 h of C. beijerinckii 8052 growth in P2 medium, the fermentation broth was distributed into two groups. Each group was made up of 3 aliquots. One group was challenged with 2 g/L furfural (treatment) and the other was left unchallenged (control), followed by anaerobic incubation at 35°C for 4 h during which samples were collected every hour for analysis. Quantified parameters include cell growth (A), acetone (B), butanol (C), ethanol (D), acetic acid (E), butyric acid (F), and residual furfural (G).