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Table 1 Ethanol production and sugar consumption for sugar cane juice fermentations with the industrial yeast strains S. cerevisiae PE-2 and CAT-1 at 25, 30 and 35 °Brix VHG conditions

From: Conditions promoting effective very high gravity sugarcane juice fermentation

Cycle PE-2 CAT-1
Ethanol (ml L−1) Consumed sugar (g L−1) Ethanol (ml L−1) Consumed sugar (g L−1)
°Brix 25 30 35 25 30 35 25 30 35 25 30 35
 Fermentation cycle 1 98.8 cC 80.2 bE 62.2 cE nd nd nd 109.0 cC 78.2 bC 132.1 abC nd nd nd
2 137.9 bB 123.4 bD 107.0 cD 250.3 cA 203.2 bA 159.43 aB 142.0 bB 120.6 cB 148.2 aA 237.5 cA 234.2 bA 253.0 aA
3 144.3 aA 132.2 cC 117.3 cC nd nd nd 152.0 aA 131.9 aA 152.1 aA nd nd nd
4 144.5 aA 141.4 bB 126.4 bB 248.6 cA 233.0 bB 194.44 aD 151.4 aA 132.7 cA 149.5 aA 245.4 cAB 253.0 bB 258.0 aA
5 144.0 aA 149.7 bA 132.5 bA nd nd nd 150.7 aAB 128.2 cA 147.7 aA nd nd nd
6 144.3 aA 149.9 bA 129.5 bAB 253.0 cA 247.7 bC 195.99 aD 151.5 A 129.4 cA 138.7 bB 247.1 cAB 250.7 bB 256.3 aA
 AVERAGE (ml L−1) 135.6 129.5 112.5 142.4 120.2 144.7
 SUM (ml) 8138 7768 6749 8543 7210 8683
  1. Results are given for the end of each 24-h fermentative cycle and are the average of three independent assays. Significantly different values are identified by different letters. Different lower case letters indicate statistical differences within each fermentation batch, and different capital letters indicate statistical differences between different fermentation batches. Italics: maximum ethanol concentration produced by each strain. The aggregated cumulative value of ethanol produced at the end of the full 6 cycles is also shown (ml) as well as the corresponding relative production in  ml L−1
  2. nd not determined