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。
The living bacteria preparation was prepared from solid material included in fermentation liguor through vacuum freeze drying.
发酵后的固形物通过真空冷冻干燥制得乳酸菌活菌制剂。
Fermentation can take place without the presence of extracted nutritive liquor, but proceed vacuum deoxygenation and add carbon dioxide to saturation and packed into final product.
浸提得到的营养液也可不参与发酵，而进行真空脱氧，加纯净二氧化碳饱和处理，即可包装得到成品。
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