Yogurt Production

Yogurt is a widely consumed dairy product that is obtained through the fermentation of lactic acid bacteria. During fermentation, these bacteria produce lactic acid, which lowers the pH and causes the coagulation of milk proteins. Metabolites of lactic acid bacteria, such as carbonyl compounds, nonvolatile or volatile acids, and exopolysaccharides, significantly affect the quality of yogurt. The production method also greatly influences yogurt characteristics. Yogurt can be produced in various forms, including solid, fluid, and soft-drinking types, depending on the manufacturing method employed. In addition, the raw materials, sterilization, homogenization, fermentation, and other conditions in each manufacturing method greatly affect yogurt’s physical properties and flavor. This chapter summarizes common and modern methods of yogurt production.