东京根霉(Rhizopus tonkinense No.9212)用于木薯淀粉生料发酵生产单细胞蛋白的研究

Protein Enrichment Using Cassava Starch by Rhizopus tonkinense No.9212

我国华南地区盛产木薯,是制造淀粉的主要原料之一。据测定,鲜木薯含水分70.3％、淀粉21.5％、糖分5.1％、粗蛋白1.1％、粗脂肪0.4％、粗纤维1.1％,灰分0.5％、菜豆苷(又称亚麻苦苷)0.01～0.04％。 木薯的淀粉含量虽很高,但蛋白质含量比较低。若能通过微生物发酵使其中一部分淀粉转化为单细胞蛋白,将可在很大程度上缓解我国饲料蛋白不足的矛盾。淀粉生料发酵,具有能耗低,工艺简便等优点。当前,

Mixed fermentation by Rhizopus tonkinense No.9212, and Candida utilis using cassava starch as raw material could obtain 30.2% crude protein instead of 3.8% crude protein before. The addition of sodium thiosulfate with 0.05%~0.08% of the substrate during the fermentation could eliminate most of phaseolunatin con-taining in the cassava starch.