Pre-treatment is one of the most important stages in the production of valuable bioproducts from lignocellulosic feedstock. It aims to destroy the complex structure of raw materials, what contributes to increase their susceptibility to enzymatic saccharification. For each type of used raw materials, it is necessary to verify the applicability of the selected pre-treatment method and process parameters. In the present work the effectiveness of pre-treatments carried out in 2% H2SO4 and 2% NaOH at various process conditions, for three lignocellulosic raw materials: (i) corn stover, (ii) corn cob, and (iii) fast-growing poplar wood, were compared. As a measure of the process efficiency, the overall yields of monosaccharides release from biomass were determined based on the amounts of glucose and xylose dissolved in the solutions used for pre-treatment as well as on the their amounts produced during enzymatic hydrolysis of solid fraction of biomass obtained after pre-treatment.

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