Table 2.

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

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; (NH 4 ) 2 HPO 4	Inoculum content of 1.0 g/L; (NH 4 ) 2 HPO 4  + MgSO 4 ·7H 2 O	Inoculum content of 1.5 g/L; (NH 4 ) 2 HPO 4	Inoculum content of 2.0 g/L; (NH 4 ) 2 HPO 4	Inoculum content of 1.0 g/L; (NH 4 ) 2 HPO 4	Inoculum content of 1.0 g/L; (NH 4 ) 2 HPO 4  + MgSO 4  · 7H 2 O	Inoculum content of 1.5 g/L; (NH 4 ) 2 HPO 4	Inoculum content of 2.0 g/L; (NH 4 ) 2 HPO 4
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

Results expressed as mean values ± standard error (n = 3). ^a-hMean values in lines with different letters are significantly different (P <0.05).