Cellulosic Ethanol Project, Institute of Nuclear Energy Research, Taoyuan County, Taiwan, ROC.
Bioresour Technol. 2011 Feb;102(3):3322-9. doi: 10.1016/j.biortech.2010.10.111. Epub 2010 Oct 28.
The present study verified an applicable technology of xylitol bioconversion as part of the integration of co-product generation within second-generation bioethanol processes. A newly isolated yeast strain, Candida tropicalis JH030, was shown to have a capacity for xylitol production from hemicellulosic hydrolysate without detoxification. The yeast gives a promising xylitol yield of 0.71 g(p) g(s)(-1) from non-detoxified rice straw hydrolysate that had been prepared by the dilute acid pretreatment under severe conditions. The yeast's capacity was also found to be practicable with various other raw materials, such as sugarcane bagasse, silvergrass, napiergrass and pineapple peel. The lack of a need to hydrolysate detoxification enhances the potential of this newly isolated yeast for xylitol production and this, in turn, has the capacity to improve economics of lignocellulosic ethanol production.
本研究验证了木糖醇生物转化的适用技术，作为第二代生物乙醇工艺中联产生成的整合部分。一种新分离的酵母菌株 Candida tropicalis JH030 被证明具有在无需解毒的情况下从半纤维素水解物中生产木糖醇的能力。该酵母在经过稀酸预处理的苛刻条件下，从非解毒的水稻秸秆水解物中得到了 0.71 g(p) g(s)(-1)的有前景的木糖醇产率。还发现该酵母的能力适用于各种其他原料，如甘蔗渣、柳枝稷、象草和菠萝皮。无需水解物解毒的能力提高了这种新分离酵母生产木糖醇的潜力，从而提高了木质纤维素乙醇生产的经济性。
