If the dissolved oxygen level is too low, a large amount of by-products will accumulate, affecting normal fermentation. If the dissolved oxygen level is too high, reactive oxygen species will be generated, and reactive oxygen species will cause irreversible damage to the growth of microorganisms and the synthesis of intracellular compounds.
Different microbial cultures have different requirements for dissolved oxygen. According to the oxygen requirements of microorganisms, controlling the appropriate dissolved oxygen level can achieve high-density fermentation of microorganisms. Therefore, it is necessary to design a fermenter device that can meet the oxygen requirements of different microorganisms and has an adjustable dissolved oxygen value.
Microbial fermentation tanks are indispensable for industrial applications in modern society. The fermentation tank replaces the traditional fermentation container, culture bottle, sauce tank and wine cellar, and the fermentation tank can be produced on a large scale, maximizing the use of raw materials, improving efficiency and yield.
As a microbial culture reactor, the fermenter can mix the materials evenly, so that the gas is well dispersed in the liquid phase, makes the solid particles evenly suspend in the liquid, suspends or fully emulsifies the uneven liquid phase, and strengthens the mass transfer and heat transfer between the materials.
The fermentation tank is mainly composed of a tank body, a stirring device, a heat transfer device, and a shaft sealing device. Other accessories can also be added according to the needs of production. If you need to inspect the internal parts and feed and discharge, various pipes will be installed. If you need to control and watch the temperature and pressure of the material, you can install thermometers, pressure gauges, sight glasses and other devices.
The kettle body of the bioreactor is composed of a cylinder body and a head, which provides a certain space for the reaction of materials. The stirring device is composed of a transmission device, a stirring shaft and a stirrer. It is used for uniform mixing of various materials participating in the reaction, which can speed up the reaction speed of the materials and conduct the reaction more fully.
The heat transfer device is to set a coil inside the kettle body and set a jacket outside the kettle body, so that the temperature of the material is within the range required for the reaction of the material. The shaft sealing device is the seal between the stirring tank and the stirring shaft to prevent the overflow of the reaction material and the infiltration of other impurities.
The fermentation tank for microorganism needs to keep the tank clean and hygienic when working. In the reaction process, in order to make the fermentation bacteria ferment well, it is necessary to maintain a constant temperature; the stirring of the material by the agitator can make the material evenly mixed. Speed up the reaction and shorten the fermentation cycle.
Microbial bioreactor generally need to meet the following basic requirements: appropriate diameter-to-height ratio, can withstand a certain pressure, break bubbles and mix well, good circulating cooling and heating system, inner wall polishing, not easy to have dead ends, tight shaft seals, high transfer efficiency, low energy consumption and other requirements.
