The invention provides compound probiotics as well as a production process and an application thereof to a
leavening agent. The compound probiotics are obtained as follows: strains with strong tolerance and excellent
fermentation performance are combined and proportioned to prepare the
dry powder of probiotics by virtue of strain activation and cultivation,
fermentation, separation and vacuum low-temperature
drying; and then the
dry powder of probiotics is compounded and packaged to obtain the complex probiotics. A continuous vacuum low-temperature
drying process is adopted, the period is shortened and the yield is improved; and the complex probiotics comprises
lactobacillus plantarum,
lactobacillus fermentum,
lactobacillus casei and
lactobacillus rhamnosus in a ratio of (2-8) to (1-6) to (1-4) to (1-3); during application, every
ton of vegetable can be well fermented within 3-5 days by use of 0.2-1kg of the
leavening agent at a fermenting temperature of 20-30 DEG C, wherein the
fermentation time is shortened by 50% in comparison with that in the conventional method, the yield of the salted and preserved vegetable is over 75%. The multipurpose probiotics
leavening agent prepared by the production process disclosed by the invention can be used for the vegetable fermenting industry and the feed fermenting industry, so that a realistic problem in agricultural production and a
food processing process is solved; and meanwhile, the product quality and the production efficiency are improved.