4. Conclusion
In this study, rice straw was used as raw material to produce ethanol with single fermentable strain, P.sitpitis has been evaluated. Without any nutritional supplementation, the ethanol yield were around 0.45~0.5 g/g in the rice straw hydrolysates. Particularly, the high ethanol yield form rice straw hydrolysate mixture by P. stipits showed the potential of developing the cofermentation process. The lower constitutes of lignin and acetyl group in the rice straw is reflected the less inhibition during hydrolysate fermentation. Overliming employed was also effective in removing phenolic compounds. These results revealed a promising perspective to develop more attractive ethanol production process from rice straw as raw material using P.stipitis.