How to cultivate probiotics

In addition to the direct-throw starter used in factories, there is also a potential market for household probiotic starter. In Europe and America, home probiotic starter is very popular, because with it, people can make probiotic yogurt at home. Compared with the large-scale production in the factory, the requirements for the number of viable bacteria in the starter for small-scale fermentation of yogurt at home are relatively low.

The production process of probiotic direct-throw starter is roughly as follows:

Inoculation, fermentation, concentration, freeze-drying and packaging.

Several key points in the production of probiotic starter cultures;

1. Optimization of fermentation medium: aiming at the highest number of viable bacteria, optimize the proportion of each nutrient component, while taking into account the cost. It is generally necessary to optimize the ratio of carbon and nitrogen sources and the content of trace elements. Soybean meal and molasses are ideal low-cost raw materials.

2. Optimization of freeze-drying protective agent: skimmed milk powder is the main choice for protection. In addition, some vitamins and other extracts need to be added. For example, some companies add herbal ingredients for protection.