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Table 3 Kinetics of ABE fermentation without/with VSVP process

From: A novel close-circulating vapor stripping-vapor permeation technique for boosting biobutanol production and recovery

Fermentation parameters Batch fermentation without VSVP Batch fermentation with VSVP
Fermentation time (h) 40 59
Glucose consumed (g/L) 66.2 ± 0.7 93.0 ± 0.7
Glucose consumption rate (g/L h) 1.66 1.57
Maximum OD600 3.2 ± 0.1 3.7 ± 0.1
Butanol production (g/L) 11.4 ± 0.5 19.6 ± 0.8
Acetone production (g/L) 5.0 ± 0.2 9.8 ± 0.3
Ethanol production (g/L) 1.3 ± 0.1 1.9 ± 0.1
Total ABE production (g/L) 17.7 ± 0.8 31.2 ± 1.2
Butanol productivitya (g/L h) 0.35 ± 0.02 and 0.23 ± 0.02 0.35 ± 0.02 and 0.34 ± 0.02
ABE productivitya (g/L h) 0.55 ± 0.02 and 0.34 ± 0.03 0.56 ± 0.02 and 0.49 ± 0.02
Butanol yield (g/g) 0.17 ± 0.01 0.21 ± 0.01
ABE yield (g/g) 0.27 ± 0.01 0.34 ± 0.02
Acetic acid produced (g/L) 1.2 ± 0.1 1.5 ± 0.1
Butyric acid produced (g/L) 1.7 ± 0.1 1.7 ± 0.1
  1. aThe ratio of products concentration to fermentation time, before and after VSVP process start (at 20 h of ABE fermentation)