微生物转化甘油生产1,3-丙二醇的研究进展

甘油是油裂解和生物柴油生产过程中的主要副产物,生物柴油市场的蓬勃发展将会造成甘油价格的下降。这些甘油-水混合物不用再次处理就可以直接用于微生物发酵。在众多甘油的利用当中,附加值最高的应该是1,3-丙二醇(PDO),利用甘油在厌氧条件下发酵生产PDO与传统工艺相比产物浓度从70～80g/L提高到了100g/L,而且如果用固定化细胞发酵,产率可以从2g/(L·h)提高到30g/(L·h)。综述了微生物转化甘油为1,3-丙二醇的研究进展。

Microtransformation of Glycerol into 1,3-Propanediol

Today, glycerol is mainly a by-product of fat splitting and biodiesel production. Further growth ot the biodiesel market would result in a fall in the price of glycerol. Glycerol-water mixture would be an interesting raw material utilised in fermentation without further pretreatment. Under anaerobic conditions, bacteria can transform glycerol intol,3-propanediol （PDO）, which can be most vaulable. The new technique used crude glycerol allowed the product concentrations,which were relatively low at a maximum of 70-80 g/L to be raised to more than I00 g/ L. Further on, the use of immobilised cells compared to freely suspended cells enables an increase of productivity from about 2 up to 30 g /（L·h）.This is a rewiew of microtransformation of glycerol into 1,3-propanediol.