Ethanol production from rice straw hydrolysates by Pichia stipitis

AbstractThe objective of this study was aimed to evaluate the fermentability of rice straw hydrolysates by P.stipitis and proposed the fermentation process available. Both of glucose and xylose in mixture of dilute acid hydrolysate and enzymatic hydrolysate were completely utilized with an ethanol yield of 0.47 g/g. This result proved that the hydrolysate mixture was more suitable for ethanol fermentation by P.stipitis and this organism has shown great potential for the development of novel co-fermentation processes designed to obtain lignocellulosic ethanol production

Xylitol production from non-detoxified Napiergrass hydrolysate using a recombinant flocculating yeast strain

Xylose derived from lignocellulose can be utilized to produce ethanol and other high-value chemicals, such as xylitol. The xylitol production through fermentation of lignocellulosic hydrolysate by microorganisms offers advantages of high product yield, high selectivity, and efficacy in mild conditions. In this study, non-detoxified hemicellulose hydrolysate from napiergrass was used for xylitol production by a recombinant flocculating strain of Saccharomyces cerevisiae. An optimization study was conducted with the strain at 35 °C. A promising xylitol yield of 0.96 g/g xylose with no addition of glucose required during the fermentation process, which suggests an extensive potential improvement for the economics of lignocellulosic xylitol production.</jats:p