Skip to main content

Advertisement

Table 1 Comparison of major product profiles in pH-controlled (pH ≥ 5.0) batch fermentations of C. acetobutylicum strains

From: Introducing a single secondary alcohol dehydrogenase into butanol-tolerant Clostridium acetobutylicum Rh8 switches ABE fermentation to high level IBE fermentation

Characteristics and products Strains    
  Rh8(pIMP1) Rh8(psADH) 1731(pIMP1) 1731(psADH)
Butanol 17.3 ± 0.2 15 ± 0.1 14 ± 0.2 12 ± 0.1
Isopropanol ND 7.6 ± 0.1 ND 7.15 ± 0.1
Acetone 7.5 ± 0.1 ND 4.44 ± 0.1 ND
Ethanol 2.72 ± 0.1 1.28 ± 0.1 1.8 ± 0.1 1.5 ± 0.1
Butyrate 0.93 ± 0.1 2.2 ±0.2 1.8 ± 0.2 2.1 ± 0.2
Acetate 0.82 ± 0.2 0.5 ±0.1 3.5 ± 0.2 2.8 ± 0.2
Total solvent 27.52 ± 0.4 23.88 ± 0.3 20.24 ± 0.4 20.65 ± 0.3
IB or AB ratioa 0.9 0.95 0.91 0.93
Solvent yield 0.336 0.314 0.277 0.287
  1. a(Isopropanol + butanol)/total solvent (g/g) or (acetone + butanol)/total solvent.