Biological fluidized bed technology is the use of gas or liquid to fluidize the solid particulate filter material attached to microorganisms to purify sewage. The biological fluidized bed method makes full use of the characteristics of different life stages of microorganisms. According to the growth characteristics of microorganisms, the treatment stage is divided into three stages: fixed bed stage, fluidized bed stage, and liquid transport stage.
The main advantages of the biological fluidized bed are as follows:
High volume load, strong impact resistance
Since the carrier of the biological fluidized bed is made of small-sized solid particles, and the carrier is fluidized, the surface area per unit volume of the biological fluidized bed is much larger than that of other biological membrane methods and the resistance capacity is higher than that of other biological treatment methods.
Good purification effect
Because the carrier particles are always in a state of violent movement, which leads to continuous renewal of the interface, this not only facilitates the adsorption and degradation of pollutants by microorganisms, but also accelerates the rate of biochemical reactions, thereby improving the purification effect.
Strong microbial activity
Due to the continuous collision and friction of biological particles, the thickness of the biological film is thin and uniform. For similar sewage, under the same treatment conditions, the biofilm not only has a fast reaction rate but also a very fast respiration rate, so the microbial activity is strong.