Now, in general, the produce of antibiotic is firstly extracted by clarification and solvent, and is separated from fermentation liquid and at last do the vacuum evaporation of the liquid extraction.
现代抗生素的生产一般首先是通过澄清和溶剂萃取从发酵液中加以分离，在对萃取液进行真空蒸发制得。
2
Secondary fermentation in vacuum tank for 2 months.
第二道发酵在真空容器里进行，时间为2个月。
3
The living bacteria preparation was prepared from solid material included in fermentation liguor through vacuum freeze drying.