Batch and FT pretreatment comparison for pretreated corn stover, poplar and bagasse. A) glucan conversion, B) sugar recovery and C) extraction of non-carbohydrate carbon. Pretreatment Conditions: 220°C, 12 min (14 min for batch pretreatment), flow rate: 30 mL/min, particle size: 2 mm. Enzyme loading for SSF: 10 FPU/g glucan (11.7 mg enzymes/g solids). Initial substrate concentration: 20 g/L glucan. The error bars show one standard deviation on duplicates.