The working principle of biological stainless steel fermenter

The biological stainless steel fermenting tank uses the air nozzle to spray the high-speed air, and the air is dispersed in the liquid in the form of bubbles. On the ventilated side, the average density of the liquid decreases, while on the non-ventilated side, the liquid density is larger, and the liquid density on the ventilated side is poor, thus forming the circulation of the liquid in the fermenting tank.There are many forms of air lift fermenter, the more common are inner circulation tube type, outer circulation tube type, tension cylinder type and vertical separator type.The outer circulation type circulation pipe is designed outside the tank, and the inner circulation pipe is two, which is designed inside the tank.In an airlift fermenter, the height of the circulating pipe is generally not higher.The liquid level in the tank is not higher than the outlet of the circulating pipe, and not lower than the outlet of the circulation.The advantages of airlift fermenter are low energy consumption, small decocting and cutting in liquid, and simple structure.At the same energy consumption, its oxygen transfer capacity is much higher than that of mechanically stirred aerated fermenter.

Biological stainless steel fermenter main advantages

(1) The structure is simple, the basic principle is not complicated, and the energy consumption is lower than that of the slurry reactor with agitator

(2) rely on the gas to produce directional circulation, rather than centrifugal pump mechanical equipment, the flow form is determined, the liquid circulation is strong, there is no moving parts inside, has a small shear stress, energy dissipation is very uniform, shear force sensitive materials have special significance;

(3) Compared with the traditional bubble tower, its operable volume of gas and liquid flow rate range is much larger;

(4) High gas supply efficiency, ventilation in the rising pipe can be greater than the air intake in the bubbling reactor, which is conducive to aerobic reaction;

(5) excellent fluidization effect, can be solid particles, even heavier particles completely maintain suspension state.