Construction of lactic acid bacteria fermentation system and analysis of fermentation products of Ruoqiang jujube

Abstract

The purpose of this experiment is to establish a lactic acid bacteria fermentation system for Ruoqiang jujube, and to investigate the product performance of its new enzyme health food. Ruoqiang jujube is nutrient-rich and has strong storage stability, making it widely applicable in the food and pharmaceutical industries. Additionally, lactic acid bacteria are widely used in fermented food processing, capable of improving food quality and regulating the composition of human intestinal microorganisms. The bacteria themselves also exhibit strong functional effects. In this experiment, Ruoqiang jujube was selected as the raw material, subjected to pretreatment and sterilization, and then fermented with a mixed lactic acid bacteria culture. Dynamic monitoring was conducted throughout the fermentation process. The results showed that the pH value of the fermentation broth gradually decreased and eventually stabilized at less than 4.0, meeting the indicators for edible plant-derived enzyme products. During the ermentation process, the types of free amino acids increased, and the utilization of reducing sugars and total sugars gradually increased, but the content of vitamin C remained relatively stable. After scoring according to a sensory scoring scale pre-established by a professional panel, the product exhibited excellent sensory characteristics. This study established a fermentation system that enables synergistic interactions between different lactic acid bacteria species and integrates the original bioactive substances of Ruoqiang jujube with lactic acid bacteria metabolites, thereby enhancing the bioactivity and nutritional value of the product. This system aligns with the development trend of the modern food industry and provides a corresponding technical foundation for the industrialization of Odor derived enzyme products. It also holds broad prospects for industrialization in functional food products.