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Sustainable Chemical Processes

Table 2 Summary of prefermentation results

From: Prefermentation improves ethanol yield in separate hydrolysis and cofermentation of steam-pretreated wheat straw

 

Severe wheat straw slurry

Mild wheat straw slurry

Batch

Fed-batch

Batch

Fed-batch

Residual sugars and end-products [g·L−1]

 Glucose

0.1

0.1

0.0

0.1

 Xylose

6.4

14.4

3.7

7.3

 Ethanol

11.2

8.4

12.1

11.2

 Xylitol

2.9

0.6

3.8

0.4

Metabolic ethanol yield [g·g−1]a

0.329

0.322

0.342

0.353

 % of theoretical

64.4

63.1

67.1

69.2

 Xylose utilization [%]

77.3

48.6

88.2

76.9

 Xylitol yield [g·g−1]b

0.136

0.041

0.137

0.017

  1. aBased on consumed glucose and xylose and related to a maximum theoretical yield of 0.51 g·g−1
  2. bBased on consumed xylose
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