Corncob residue pretreatment for 2,3-butanediol production by simultaneous saccharification and fermentation

Abstract

In order to utilize corncob residue in the production of 2,3-butanediol, a pretreatment method was carried out. Sodium hydroxide method was chosen from six different types of pretreatment for lignocellulosic materials. After the composition analysis and fermentation experiment of the treated residue, the condition of pretreatment was suggested (hydroxide concentration of 1.5 %, processing temperature at 80 °C, processing time of 3 h, solid-to-liquid ratio of 1:8). Comparison between the primary material and the treated residue was conducted, the results proved that the output of 2,3-butanediol and acetoin (20.35 g/L) with the treated material was 3.38 times of the yield with the unpre-treated corncob residue (6.02 g/L). After 72 h SSF, sugar yield of the cellulose was 75.40 %. © Springer-Verlag Berlin Heidelberg 2014.