State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, People's Republic of China.
Bioresour Technol. 2012 Jun;114:711-4. doi: 10.1016/j.biortech.2012.02.118. Epub 2012 Mar 4.
Hemicellulose, which contains glucose, xylose, and arabinose as the 3 main sugars, is an important renewable source for biorefinery. In this study, propionic acid production from glucose, xylose, or arabinose using Propionibacterium acidipropionici ATCC 4875 was investigated. Using xylose, the predominant sugar in hemicellulose, a final propionic acid concentration of 53.2 g l(-1) was obtained via fed-batch fermentation. Using corncob molasses, a waste by-product from xylitol production as a representative of hemicellulose hydrolysate, the final concentration of propionic acid was 71.8 g l(-1), with a corresponding productivity of 0.28 g l(-1) h(-1). The present study suggests that hemicellulose hydrolysate is an excellent carbon source for efficient propionic acid production by this strain.
半纤维素含有葡萄糖、木糖和阿拉伯糖这 3 种主要糖，是生物炼制的一个重要可再生资源。在这项研究中，使用丙酸短杆菌 ATCC 4875 从葡萄糖、木糖或阿拉伯糖生产丙酸。利用半纤维素中主要的糖——木糖，通过分批补料发酵获得了 53.2 g/L 的最终丙酸浓度。以玉米芯糖蜜（木糖醇生产的一种副产物，代表半纤维素水解物）为代表，最终丙酸浓度为 71.8 g/L，相应的生产速率为 0.28 g/L·h。本研究表明，半纤维素水解物是该菌株高效生产丙酸的极好碳源。
