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Table 2 Chemical composition of distillates obtained from the fermentation of thick juice worts

From: Evaluation of the fermentation of high gravity thick sugar beet juice worts for efficient bioethanol production

Compound (mg/L 100% v/v ethyl alcohol) Parameters of fermentation
Extract content of 250 g/kg Extract content of 280 g/kg
  Inoculum content of 1.0 g/L; (NH4)2HPO4 Inoculum content of 1.0 g/L; (NH4)2HPO4 + MgSO4·7H2O Inoculum content of 1.5 g/L; (NH4)2HPO4 Inoculum content of 2.0 g/L; (NH4)2HPO4 Inoculum content of 1.0 g/L; (NH4)2HPO4 Inoculum content of 1.0 g/L; (NH4)2HPO4 + MgSO4 · 7H2O Inoculum content of 1.5 g/L; (NH4)2HPO4 Inoculum content of 2.0 g/L; (NH4)2HPO4
Methanol 8.1 ± 0.8a 7.7 ± 0.7a 9.3 ± 0.9a 7.7 ± 0.8a 9.3 ± 0.9a 8.1 ± 0.8a 9.3 ± 0.9a 9.1 ± 0.9a
Acetaldehyde 763.4 ± 4.2a 1626.0 ± 4.1b 2226.0 ± 6.5c 2214.5 ± 6.3c 3214.5 ± 7.5d 3869.8 ± 8.8e 3971.8 ± 9.2f 4172.9 ± 9.8g
Methyl acetate 8.2 ± 0.8a 9.2 ± 0.8a 8.6 ± 0.8a 9.3 ± 0.8a 7.9 ± 0.8a 9.0 ± 0.8a 8.3 ± 0.8a 9.2 ± 0.8a
Ethyl acetate 266.3 ± 2.5b 248.7 ± 2.5a 284.5 ± 2.8d 270.8 ± 2.6c 248.7 ± 2.5a 246.8 ± 2.5a 243.7 ± 2.5a 285.0 ± 2.8d
Isoamyl acetate 0.0a 0.0a 0.0a 1.9 ± 0.2b 2.6 ± 0.2c 4.2 ± 0.3d 7.1 ± 0.5e 8.7 ± 0.5f
Ethyl butyrate 33.5 ± 0.9c 45.3 ± 1.4d 60.1 ± 1.5f 52.1 ± 1.4e 18.0 ± 0.6a 18.6 ± 0.6a 21.9 ± 0.8b 22.6 ± 0.8b
n-propanol 155.9 ± 2.2bc 177.2 ± 2.8e 187.1 ± 2.8f 158.9 ± 1.6c 152.9 ± 1.6ab 150.3 ± 1.5a 206.1 ± 2.7g 165.9 ± 1.5d
2-methyl-1-propanol 314.3 ± 3.2b 307.2 ± 2.8a 368.9 ± 3.5d 381.1 ± 3.5e 357.8 ± 3.5c 402.2 ± 3.8f 355.7 ± 3.5c 355.3 ± 3.5c
n-butanol 7.4 ± 0.5a 7.8 ± 0.5ab 7.5 ± 0.5a 7.5 ± 0.5a 6.8 ± 0.5a 7.6 ± 0.5a 8.9 ± 0.7b 8.1 ± 0.6b
2-methyl-1-butanol 236.3 ± 2.5a 249.4 ± 2.5b 299.7 ± 2.9e 269.6 ± 2.7c 272.1 ± 2.7c 283.2 ± 2.7d 284.5 ± 2.7d 306.7 ± 3.2f
3-methyl-1-butanol 650.7 ± 3.5a 667.7 ± 3.8b 805.8 ± 4.1d 818.2 ± 4.2e 719.4 ± 3.8c 906.8 ± 4.2g 969.0 ± 4.3h 879.7 ± 4.1f
  1. Results expressed as mean values ± standard error (n = 3). a-hMean values in lines with different letters are significantly different (P <0.05).