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Table 2 Metabolic products and enzymatic activities of Clostridium sp. strain NJP7

From: Strategies for improved isopropanol–butanol production by a Clostridium strain from glucose and hemicellulose through consolidated bioprocessing

  Control With VB3 With butyrate + VB3
Acetone (g/L) 0.93 0.89 2.21
Isopropanol (g/L) 0.55 0.72 1.92
Butanol (g/L) 5.14 6.28 12.21
Ratio of isopropanol:acetone 0.59:1 0.81:1 0.87:1
Glucose consumption (g/L) 20.18 21.87 41.98
AIB yield (g/g) 0.33 0.36 0.39
Max. OD (A600) 4.51 4.98 5.62
s-ADHa (U/mg) 0.19 0.31 0.46
ADHa (U/mg) 0.26 0.32 0.58
  1. Control fermentation without addition of any exogenous acids and pH adjustment
  2. Other experiments fermentation with addition of VB3 (20 mg/L) or butyrate (60 mM) and VB3(20 mg/L) without pH adjustment
  3. aAll of the samples were collected at their exponential phases for detection of their s-ADH and ADH activities: 24 h for Control and With VB3; 18 h for W With butyrate and VB3