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Table 3 The effects of washing times on ABE fermentation and wastewater generation

From: The advanced strategy for enhancing biobutanol production and high-efficient product recovery with reduced wastewater generation

  (0-W)/HN (1-W)/HN (2-W)/HN (3-W)/HN 8-W
Initial pH 13.1 13.1 13.1 13.1 13.1
Washed/HCl-neutralized pH 13.1/8.8 11.9/8.8 10.7/8.8 9.7/8.8 8.8/8.8
Initial JAS, g 200 200 200 200 200
Pretreated JAS, g 172.7 170.1 165.6 162.3 148.6
Initial glucose, g/L 33.0 36.5 38.8 46.3 48.2
Initial xylose, g/L 12.3 12.5 12.4 13.9 13.6
Butanol, g/L 8.6 9.7 10.1 10.8 11.2
Acetone, g/L 4.8 4.9 5.2 5.7 5.8
Ethanol, g/L 0.2 0.2 0.2 0.2 0.2
Butanol yield, mg/g-JAS 29.7 33.0 33.5 35.5 33.5
ABE yield, mg/g-JAS 47.0 50.3 51.3 54.2 51.1
Water volume, L 0 3 6 9 24
Water consumption, L/g-butanol 0 0.45 0.90 1.3 3.6
  1. (0-W)/HN unwashed/HCl-neutralization, (1-W)/HN washing 1 time/HCl-neutralization, (2-W)/HN washing 2 times/HCl-neutralization, (3-W)/HN washing 3 times/HCl-neutralization, 8-W washing 8 times
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