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Table 2 Concentration of volatile compounds on the steady state of aerated (at 0.02 vvm) and non-aerated S. cerevisiae S1 continuous cultures fed with sterilized (SM) and non-sterilized medium (NSM)

From: Improvement on the productivity of continuous tequila fermentation by Saccharomyces cerevisiae of Agave tequilana juice with supplementation of yeast extract and aeration

Volatile compound (mg L−1) Aeration and dilution rates
0 vvm and 0.08 h−1 0.02 vvm and 0.08 h−1
SM NSM SM NSM
A (Non-supplemented with yeast extract)
Acetaldehyde 50.52 ± 0.39 46.26 ± 2.12 39.55 ± 0.65 46.02 ± 0.32
Methanol 151.08 ± 6.46 128.26 ± 0.04 176.54 ± 23.23 111.88 ± 0.91
Propanol 51.16 ± 0.08 44.25 ± 0.08 92.59 ± 13.99 50.22 ± 1.90
Butanol 1.96 ± 0.00 1.03 ± 0.05 2.32 ± 0.32 0.95 ± 0.09
Isobutanol 10.15 ± 0.37 13.98 ± 0.31 18.31 ± 2.63 15.50 ± 0.57
Isoamyl Acohol 29.39 ± 0.63 23.71 ± 0.31 24.94 ± 6.04 17.93 ± 0.68
2-Phenylethanol 7.74 ± 0.52 8.66 ± 0.67 7.79 ± 1.20 13.46 ± 0.17
Ethyl acetate 17.53 ± 3.25 12.89 ± 0.25 5.89 ± 0.34 14.90 ± 0.73
Isoamyl acetate 0.39 ± 0.29 0.24 ± 0.04 0.09 ± 0.02 0.16 ± 0.00
Ethyl hexanoate 0.18 ± 0.26 0.11 ± 0.01 0.04 ± 0.01 0.10 ± 0.00
Ethyl octanoate 0.18 ± 0.11 0.06 ± 0.02 0.09 ± 0.03 0.03 ± 0.02
Ethyl decanoate nd nd 0.20 ± 0.07 nd
Phenethyl acetate 0.06 ± 0.01 0.16 ± 0.04 0.09 ± 0.02 nd
α-terpineol 0.21 ± 0.17 0.11 ± 0.06 0.61 ± 0.14 0.07 ± 0.09
2, 3 Butanedione 0.60 ± 0.13 1.94 ± 0.25 3.12 ± 0.54 0.29 ± 0.03
  1. nd Compound not detected under the analysis conditions. Values are the means ± standard deviations (n = 3)
Volatile compound (mg L−1) Aeration and dilution rates
0 vvm and 0.10 h−1 0.02 vvm and 0.12 h−1
SM NSM SM NSM
B (Supplemented with yeast extract)
Acetaldehyde 57.47 ± 3.12 30.33 ± 3.93 59.51 ± 0.35 30.45 ± 2.03
Methanol 103.04 ± 10.05 134.77 ± 3.13 100.16 ± 9.56 125.03 ± 0.91
Propanol 69.94 ± 5.88 65.93 ± 4.68 65.74 ± 4.48 70.02 ± 0.99
Butanol 1.30 ± 0.36 0.73 ± 0.58 0.55 ± 0.78 0.97 ± 0.01
Isobutanol 16.39 ± 0.86 16.81 ± 0.73 18.41 ± 4.37 15.23 ± 0.10
Isoamyl Acohol 53.74 ± 0.76 58.52 ± 3.57 51.88 ± 4.79 49.14 ± 0.74
2-Phenylethanol 10.44 ± 1.24 4.82 ± 1.94 5.71 ± 2.87 3.91 ± 0.74
Ethyl acetate 14.73 ± 0.44 46.29 ± 2.56 16.09 ± 0.42 18.15 ± 0.98
Isoamyl acetate 0.91 ± 0.49 3.10 ± 0.08 1.08 ± 0.51 0.88 ± 0.04
Ethyl hexanoate 0.38 ± 0.18 0.84 ± 0.07 0.34 ± 0.15 0.40 ± 0.01
Ethyl octanoate 0.14 ± 0.08 0.11 ± 0.16 0.07 ± 0.09 0.05 ± 0.06
Ethyl decanoate 0.03 ± 0.04 0.06 ± 0.08 0.01 ± 0.01 nd
Phenethyl acetate 0.26 ± 0.01 0.16 ± 0.09 0.18 ± 0.26 nd
α-terpineol 0.08 ± 0.02 nd nd nd
2, 3 Butanedione 0.76 ± 0.50 1.67 ± 0.69 0.30 ± 0.42 0.99 ± 0.04
  1. nd Compound not detected under the analysis conditions. Values are the means ± standard deviations (n = 3)