Benign lactobacillus strain capable of reducing secondary precipitation of soybean sauce, and screening method and applications thereof

Abstract

The invention provides a screening method for benign lactobacillus strain capable of reducing the secondary precipitation of soybean sauce. The method includes the following steps: S1, performing amplification culture on different sets of lactobacilli, performing microscopic examination on a nutrient solution, and preliminarily screening strains with 3-8 cells connected together; S2, performing salt tolerance analysis test on the lactobacillus strains preliminarily screened in the S1, and secondarily screening the lactobacilli suitable for high salt soy sauce brewing process; and S3, adding the lactobacilli through secondary screening in the S2 into soy sauce mash to perform fermentation, detecting histamine and tyramine content in supernatant after the fermentation is completed, selectingthe lactobacilli whose histamine and tyramine content are lower than 25 mg / L, which are the required lactobacillus strains. A soybean sauce preparation technology applying the screened benign lactobacillus strains is simultaneously provided. The benign lactobacilli can be obtained through strain forms, salt tolerance test and soy sauce mash fermentation and screening and added at a soy sauce mashpreparation phase, so that the secondary precipitation of soybean sauce can be reduced, and the flavor of the soybean sauce can be improved.

Description

technical field [0001] The invention belongs to the technical field of soy sauce brewing, and in particular relates to a benign lactic acid bacteria strain capable of reducing secondary precipitation of soy sauce, and also relates to a process for preparing soy sauce using the lactic acid bacterial strain capable of reducing secondary precipitation of soy sauce. Background technique [0002] Soy sauce is one of the condiments necessary for Chinese life, and our country exports a large amount of soy sauce every year. Although the quality of Cantonese-style soy sauce is not inferior to that of Japanese soy sauce, the price of the former in the international market is lower than that of soy sauce. About two-thirds, although all the soy sauces exported by my country are produced with high-quality raw materials, and the products have been strictly sterilized, filtered, tested and other processes, and there is no sediment when exported, but the soy sauces sold after a period of stor...

AI Technical Summary

Problems solved by technology

Microscopic examination and compositional analysis of the secondary precipitation show that it is mainly formed by the aggregation of a large number of lactic acid bacteria, and secondly, it also includes undecomposed protein in the raw materials. Although the secondary precipitation has little effect on the taste of consumers, it seriously affects the quality of the product. Appearance, thus affecting the sales and export of soy sauce

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