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Table 5 Total mono- and oligosaccharides organic acids and furans in wash water of HTT solid fraction

From: Ensiling and hydrothermal pretreatment of grass: consequences for enzymatic biomass conversion and total monosaccharide yields

Biomass Grass Grass silage
HTT temperature 170 180 190 170 180 190
  (w/w)% of DM (w/w)% of DM
Monosaccharides 6.81a ± 0.07 4.13b ± 0.20 3.19c ± 0.19 1.10d ± 0.07 1.28d ± 0.04 1.53d ± 0.01
Oligosaccharides 5.01d ± 0.43 11.47c ± 0.28 18.20a ± 0.45 5.73d ± 0.45 10.25c ± 0.41 13.46b ± 0.21
C5:C6 ratio of oligomers na. 1.4 3.6 3.1 4.3 6.4
Organic acids 2.65b ± 0.06 2.94b ± 0.14 2.74b ± 0.22 5.70a ± 0.14 5.81a ± 0.12 5.77a ± 0.03
Furans 0.11c ± 0.00 0.24b ± 0.01 0.46a ± 0.03 0.07c ± 0.00 0.12c ± 0.00 0.21b ± 0.00
  1. HTT temperature presented as °C. Numbers are presented as weight percentages of DM in the HTT solid fraction, followed by standard deviations (a,b,c,d). Different superscript letters a,b,c,d indicate significantly different values (P <0.05) row-wise). DM, dry matter; HTT, hydrothermal treatment.