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Table 2 Energy consumption of ball milling, and mixing energy during high-solids EH

From: High-solids enzymatic hydrolysis of ball-milled corn stover with reduced slurry viscosity and improved sugar yields

Substrate Milling energy (MJ kg−1 DM) Reactor Hydrolysis conditions Solids loading (w/w) Mixing energy (MJ kg−1 DM) Glucose yield (%) Refs.
Steam-exploded CS NA 5 L, helical impeller 7 FPU g−1 DM,
72 h,
120 rpm
20% 0.57 68 (ethanol) [9]
25% 1.36 64.8 (ethanol)
30% 3.36 52.1 (ethanol)
Steam-exploded spruce NA 2.5 L, blade impeller 20 FPU g−1 glucan,
96 h,
300 rpm
10% ~ 1.7 ~ 58 [26]
SO2 + steam-exploded spruce NA 3 L, anchor impeller 0.1 g CTec2 g−1 DM,
48 h,
10 rpm
10% 0.116 ~ 34 [8]
15% 0.135 ~ 28
20% 0.272 ~ 24
Steam-exploded sugarcane bagasse NA 3 L, dual-impeller 10 FPU g−1 DM,
96 h,
470 rpm
10% (w/v) 3.2–7.53 ~ 60–75 [27]
BMCS0 0 7 L, helical impeller 10 FPU g−1 DM,
48 h,
55 rpm
20%a 8.23 14.3 This study
BMCS10 0.66 20%a 3.69 23.3
BMCS30 4.16 30% 0.037 49.4
BMCS60 9.63 30% 0.021 55.3
BMCS120 19.34 30% 0.003 58.4
  1. NA not applicable
  2. a BMCS0 and BMCS10 with 30% solids loading was hard to handle, so the data at 20% were used instead