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Table 3 Energy requirement to separate acetone–butanol–ethanol from fermentation broth using different recovery techniques [Refs. (Abdehagh et al. 2013; Huang et al. 2014; Raganati et al. 2018]

From: Agricultural byproducts-based biosorbents for purification of bioalcohols: a review

Recovery process Butanol concentration jump (wt%) Energy consumption (MJ/kgbutanol)
Hybrid process gas stripping/distillation From 0.78 to pure 21
Gas stripping/pervaporation/distillation hybrid process From 1 to > 99.5 23
Extraction/distillation From 2.2 to 92 4–6
Pervaporation/distillation From 1 to pure 4
Adsorption/drying/desorption From 2 to 98 3.4
Liquid–liquid extraction From 1.8 to 99.5 6–9.9
Gas stripping/absorption/distillation From 1.8 to 99.5 10
Distillation From 1 to 99.99 30
Gas stripping From 1 to 50% 20
Extraction From initial to 75% butanol removal 13
Pervaporation Remove 25% of butanol from the solution 8