What is the explanation of fermentation engineering terms?

Fermentation engineering refers to the use of certain specific functions of microorganisms, the use of modern engineering technology to produce products useful to human beings, or the direct application of microorganisms to industrial production processes.

The application of biotechnology such as fermentation engineering has brought great changes to the traditional fermentation industry. Fermentation engineering has the following characteristics: mild production conditions; The raw materials are abundant, the price is low, and the products are specific; Waste has little environmental pollution and is easy to handle.

Principle of fermentation engineering

(1) temperature

Temperature can affect the activity of enzymes and the pathway of biosynthesis. Temperature will also affect the physical properties of fermentation broth and the decomposition and absorption of nutrients by bacteria.

(2) pH value

PH can affect the activity of enzyme and the charged state of cell membrane. It will also affect the decomposition of nutrients in the culture medium.

(3) Dissolved oxygen

In the fermentation process, the strain can only use dissolved oxygen. Therefore, it is necessary to constantly supplement a large amount of oxygen to the fermentation broth and constantly stir it to improve the solubility of oxygen in the fermentation broth.

(4) Foam

In the fermentation process, aeration, stirring, microbial metabolism and the decomposition of some components in the culture medium may all produce foam. Too much continuous foam is not conducive to fermentation.

(5) the concentration of nutrients

The concentration of various nutrients in fermentation broth, especially the ratio of carbon to nitrogen, inorganic salts and vitamins, will directly affect the growth of bacteria and the accumulation of metabolites.