Many traditional cuisines in China contain bio-fermentation technology. The following statement is correct: In the process of making steamed bread, yeast breathes to produce CO2.

fermentation technology refers to the technology that people use the fermentation function of microorganisms to control the fermentation process and produce fermented products on a large scale, which is called fermentation technology. Fermentation technology is one of the earliest food processing technologies developed and applied in biotechnology.

Many traditional fermented foods, such as wine, lobster sauce, sweet sauce, bean paste, yogurt, bread, ham, pickles, fermented bean curd and cheese. With the rapid development of molecular biology and cell biology, modern fermentation technology came into being. The combination of traditional fermentation technology with DNA recombination technology and cell fusion technology has become the main feature of modern fermentation technology and engineering.

Fermentation is the process of transforming organic substances into products by using the metabolic activities of microorganisms and biocatalysts. In a narrow sense, the decomposition of sugar or similar sugar substances under aerobic conditions. For example, Streptococcus lactis converts lactose into lactic acid under anoxic conditions, while Acetobacter converts alcohol into acetic acid under aerobic conditions. Fermentation technology is a technology that uses fermentation to obtain products.

While microorganisms decompose macromolecules (such as protein and polysaccharide) in food, some metabolites are also produced due to the metabolism of microorganisms, many of which are nutritious substances, such as amino acids and organic acids. Seeds and grains contain cellulose which is not easily digested by human body.

Characteristics and functions of fermented food:

1. Inhibit the growth of spoilage bacteria and common pathogenic bacteria.

2. Fermented food can improve the nutritional value of original unfermented food.

3. After the food is fermented, its original color, shape and flavor will be changed, and it will be changed according to people's wishes.