Production method of solid yogurt powder containing high active bacteria

Abstract

The present invention discloses a production method of solid yogurt powder containing high active bacteria. Firstly, a yogurt fermentation agent is prepared by a high density culture, lactobacillus bulgaricus and streptococcus thermophiles are respectively activated and mixed, the mixed bacteria are inoculated into a sterile lactic acid solution to obtain a high density bacterial liquid, a cryoprotectant is added, and the bacterial liquid is freeze-dried to obtain the yogurt fermentation agent; secondly, the a yogurt containing the high active bacteria is obtained by a secondary fermentation, and the condition is as follows: milk powder is mixed with water, a first yogurt fermentation agent is inoculated, the fermentation is conducted for 4-6 h, and a second fermentation agent is inoculated, the fermentation is conducted for 2-4 h; and finally, lactose, whey protein and skim milk powder are mixed with the yogurt, the mixture is homogenized, and the homogenized mixture is subjected to a low temperature spray drying to obtain the yogurt powder. The produced yogurt powder is high in the number of viable bacteria. Due to the fact that the number of the viable bacteria is high in the yogurt powder, the blending time is greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of food production and relates to a production process of yoghurt powder with high active bacteria. Background technique [0002] Yogurt is a dairy product made by fermenting fresh milk with specific strains such as Lactobacillus bulgaricus and Streptococcus thermophilus. It can stimulate the secretion of gastric juice, help digestion, improve appetite and gastrointestinal function, and at the same time effectively Prevent human intestinal infection, improve the immune function of the human body, inhibit the growth of toxin-producing microorganisms parasitic in the human intestinal tract, remove harmful substances in the intestinal tract, promote the absorption of VD, calcium, iron and other trace elements, and reduce blood cholesterol levels , prevent cardiovascular disease, is of great benefit to the human body, and has the effect of delaying human aging. [0003] Although yogurt is rich in nutrients and ...

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of long production cycle, high energy consumption, small unit production capacity and high production cost of freeze-drying technology, its wide application is limited.

Some yogurt powders on the market are re-added with bacterial agents after spray drying to improve the bacteria content and functionality of yogurt powders, but these yogurt powders require more than 6 hours of re-fermentation