Related Experiment Video
Updated: Jun 13, 2026

The Cultivation, Growth, and Viability of Lactic Acid Bacteria: A Quality Control Perspective
Published on: June 16, 2022
Optimisation of lactic acid fermentation for improved vinegar flavour during rosy vinegar brewing
Yujian Jiang1, Jianna Guo, Yudong Li
1School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, China.
Background:
Rosy vinegar is a well-known traditional Chinese product whose flavour is affected by its lactic acid content. In this study, Lactobacillus bacteria were employed to increase the content of lactic acid during the ethanol fermentation stage.
Results:
The optimised fermentation parameters were determined as an inoculation amount of 3% (v/v), a temperature of 30 degrees C and an initial pH value of 4.0. Fermentation under these optimal conditions resulted in an alcohol degree of 6.2% (v/v), a total acidity of 49.5 g L(-1) and a lactic acid content of 4.14 g L(-1). The content of lactic acid (4.14 g L(-1)), which approached the level achieved by solid state fermentation, was 3.56-fold higher than that in vinegar fermented without lactic acid bacteria (1.16 g L(-1)).
Conclusion:
The results indicate that mixed fermentation with Lactobacillus plantarum and Saccharomyces cerevisiae strains greatly increases the lactic acid content and improves the flavour of rosy vinegar.
Related Concept Videos
Production of Organic Acids
Microbes in the Production of Fermented Foods
Microbes in Beverage Production
Microbes in Food Production
Production of Alcohol
Bioreactor Controls-III

