半纤维素蒸汽爆破水解物抽提及其发酵生产单细胞蛋白工艺

对蒸汽爆碎麦草中的半纤维素水解物抽提进行了研究,半纤维素水解物抽提液糖浓度达到87．6g／L,水抽提液中90％为木糖．利用半纤维素水解物抽提液,在2L全自动机械搅拌发酵罐中进行重复补料发酵实验,菌体干重达45g／L,生产率为4．4g／（L·h）,并在2L全自动发酵罐中进行了高密度发酵－薄膜浓缩－直接喷雾干燥工艺探索．

PRODUCTION OF SINGLE CELL PROTEIN BY FERMENTATION OF EXTRACTS FROM HEMICELLULOSE AUTOHYDROLYSIS

The sugar leaching process for steam-exploded straw was investigated. Theconcentration of sugar reached 87.6 g/L, and in the leached sugars, xylose was about 90%.In a 2 liter auto-fermeotor for producing single cell protein from leached sugar, the biomassconcentration of 45 g/L and the productivity of 4.4 g/(L.h) were obtained in batch-fed fermentation experiments. In addtion, the clean process for single cell protein production was exploredwith the technological route of high-density fermentation, pellicular concentration and directspraying desication.