No abstract

Distillers grain (DG) is an abundant and low-cost lignocellulosic biomass. The objective of paper is to compare the influence of different acids on hydrolysis of DG and select the best acid. The results indicate that sulfuric acid is the most effective acid, and the optimum hydrolysis conditions are temperature 100°C, sulfuric acid concentration 2.0%, solid-liquid rate 1:12 (w/v), time 3.0 h. Under these conditions, the concentration of reducing sugar (RS) and xylose are 43.69 g/L and 35.16 g/L, respectively. The bioethanol production is around 11.82 g/L, which corresponds to 77.12% of theoretical yield and 0.14 g/g of consumed sugar.

No abstract

The efficiency of two lignocellulose pretreatment technologies, steam explosion and ferric chloride solution pretreatment, are compared in terms of composition, structural and enzymatic efficiency with corn stover. Ferric chloride solution pretreatment could easily remove almost all of the hemicelluloses and gain high enzymatic hydrolysis compared with steam explosion, but they both have no effect on delignification and reduced cellulose crystalline. Pretreated material was investigated by X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectroscopy. These results suggested that ferric chloride solution pretreatment may own huge advantages compared to the steam explosion pretreatment process for corn stover. However, the recovery of the ferric chloride solution should also be paid more attention.