Fig. 4

Hydrothermal treatment (HT) of the solid phase of thin stillage for different reaction times at 180 °C: pentosan recovery yield η_HT,p related to total amount of pentosans in the liquid hydrolysate and in the solid residue as well as the pentosan solubilisation yield σ_p (left). Yield of released monomeric pentose η_HT,j related to the total amount of pentose j in the solid (right) (mean values of duplicates; error bars correspond to the standard deviation)