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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

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)