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Table 2 Ethanol yields and conversion efficiencies (mean ± standard deviation of triplicate runs)

From: Dry-grind processing using amylase corn and superior yeast to reduce the exogenous enzyme requirements in bioethanol production

Conditions

Final ethanol concentration (%)

Final glycerol concentration (%)

Ethanol yield (gal/bu, dry basis)

Conversion efficiency (%)

Conventional corn_ conventional yeast

17.62 ± 0.19 e

1.38 ± 0.03 a

2.86 ± 0.06 d

81.97 ± 1.26 c

Conventional corn_SY_0 % GA

17.46 ± 0.22 e

0.38 ± 0.01 g

2.84 ± 0.03 d

81.30 ± 0.85 c

Conventional corn_SY_25 % GA

18.45 ± 0.22 b c

0.74 ± 0.08 d

3.04 ± 0.03 a b

87.07 ± 0.91 a

Conventional corn_SY_50 % GA

18.73 ± 0.15 a b

0.91 ± 0.04 c

3.09 ± 0.02 a

88.50 ± 0.55 a

15 % Amylase corn_ conventional yeast

18.05 ± 0.23 d

1.24 ± 0.03 b

2.98 ± 0.06 b c

85.07 ± 1.80 b

15 % Amylase corn_SY_0 % GA

16.73 ± 0.06 f

0.30 ± 0.01 g

2.72 ± 0.01 e

77.57 ± 0.33 d

15 % Amylase corn_SY_25 % GA

18.31 ± 0.18 c d

0.54 ± 0.08 f

2.96 ± 0.01 c

84.50 ± 0.33 b

15 % Amylase corn_SY_50 % GA

18.97 ± 0.35 a

0.64 ± 0.06 e

3.05 ± 0.04 a

87.01 ± 1.26 a

  1. SY superior yeast
  2. Means followed by the same letter in one column are statistically not different (at P < 0.05)