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Table 4 Energy demand comparison for volatile fatty acids (VFAs) recovery processes

From: Energy-efficient recovery of fermented butyric acid using octyl acetate extraction

Products

Solvent

Feedstock (wt%)

Reboiler duty (MW) for product t/h

Remark

Refs.

VFA

MTBE

5

3.35

Heat integrated

[53]

VFA

Ethyl acetate

5

2.69

 

[13]

Butyric acid

Octanol

5.5

5.89

 

[54]

VFA

Nonyl acetate/hexyl acetate

0.97

1.34

 

[9]

Butyric acid

Octyl acetate

2.67

2.72

Heat integrated

This study

  1. The VFAs have two (acetic acid) to six (caproic acid) carbon atoms