【摘要】：對發(fā)酵蔗渣產(chǎn)黃腐酸(FA)的高產(chǎn)菌株-枯草芽孢桿菌的培養(yǎng)基配方及培養(yǎng)條件進行優(yōu)化研究.獲得的優(yōu)化培養(yǎng)基配方為:可溶性淀粉、蛋白胨、磷酸氫二鉀和硫酸鎂的添加量分別為12.50、12.50、0.25、0.50 g·L~(-1);優(yōu)化的培養(yǎng)條件為:pH 7.0、溫度37℃、裝液量20 m L/250 m L、轉速130 r·min~(-1)、接種量5%(體積分數(shù)).在該優(yōu)化的培養(yǎng)基及培養(yǎng)條件下,枯草芽孢桿菌培養(yǎng)12 h后的細胞生物量達2.280×10~9cfu·m L~(-1),較優(yōu)化前提高了77.9倍.采用優(yōu)化前后的條件培養(yǎng)菌種進行發(fā)酵產(chǎn)黃腐酸實驗,結果優(yōu)化后的發(fā)酵產(chǎn)品中FA含量為26.36%(質量分數(shù)),細胞生物量為1.09×10~9cfu·g~(-1),比優(yōu)化前分別提高了13.9%和2.3倍.
[Abstract]:The medium formulation and culture conditions of Bacillus subtilis, a high yield strain producing fulvic acid (FA) from bagasse, were optimized. The optimum conditions of culture medium were as follows: soluble starch, peptone, dipotassium hydrogen phosphate and magnesium sulfate were 12.50 ~ (12.50) ~ (0.25) g / L ~ (-1), respectively, and the optimum culture conditions were as follows: (1) pH 7.0, 37 鈩，

本文編號：2160191