Biological fermentation equipment uses air nozzles to inject high-speed air, which is dispersed in the liquid in the form of bubbles.
On the ventilation side, the average density of the liquid decreases, while on the non-ventilation side, the liquid density is higher, creating a density difference with the liquid on the ventilation side, thereby forming liquid circulation in the fermentation equipment.
There are many types of air-lift fermentation equipment, among which the commonly used types are internal circulation pipes, external circulation pipes, risers, and vertical baffles. The external circulation pipe is designed outside the tank, and the internal circulation pipes are two in number, designed inside the tank.
In air-lift fermentation equipment, the height of the circulation pipe is generally not higher than the liquid level inside the tank, not higher than the outlet of the circulation pipe, and not lower than the outlet of the circulating flow. The advantages of air-lift fermentation equipment include low energy consumption, minimal shearing in the liquid, and simple structure. Under the same energy consumption, its oxygen transfer capacity is significantly higher than that of mechanical agitation and aeration fermentation equipment.
Precautions When Using Biological Fermentation Tanks
When using a biological fermentation tank, the following points need to be noted:
Check the liquid level before sterilization: Before sterilizing the biological fermentation equipment, be sure to check the liquid level in the tank, ensuring that all electrodes are not below the liquid level.
Check cooling water and temperature probe: Before turning on the power of the biological fermentation equipment, be sure to check if the cooling water is turned on and whether the temperature probe is inserted into the tank, otherwise the heating circuit may burn out.
Keep the workstation clean: During fermentation, keep the workstation clean, promptly clean used culture bottles, and immediately wipe dry any spilled acid, alkali solutions, or water.
Pay attention to fragile and expensive parts: Special care should be taken with the pH electrodes and fragile and expensive parts of the tank during installation, disassembly, and sterilization of the biological fermentation equipment.
Wide Applications of Biological Fermentation Tanks
Biological fermentation tank equipment is widely used in modern society, especially in milk fermentation. With the continuous improvement in living standards, milk has become an essential item in people's daily lives, and biological fermentation tanks are also widely used in beverage production. However, the method of using biological fermentation tanks is very important; if used improperly, it can not only cause damage to the tank but also result in substandard fermentation products.
Correct Methods for Using Biological Fermentation Tanks
The methods for using biological fermentation tanks include the following points:
Tank body design: The tank body has a jacket and insulation layer, which can be used for heating, cooling, and insulation. Both the tank body and the upper and lower filling heads (or prototypes) are processed with rotary R-angle, and the inner wall of the tank is mirror-polished, with no sanitary dead corners.
Fully sealed design: The fully sealed design ensures that the materials are always mixed and fermented in a pollution-free state. The equipment is equipped with an air breather, CIP cleaning nozzle, manhole, and other devices.
Classification: Based on the equipment of the biological fermentation tank, it can be classified into mechanically agitated aerated biological fermentation tanks and non-mechanically agitated aerated biological fermentation tanks. According to the growth and metabolism needs of microorganisms, they can be classified into aerobic fermentation tanks and anaerobic fermentation tanks.
English
