The principle is to use the metabolic activity of microorganisms to decompose, transform and remove odorous substances. The biological deodorization distribution cabinet is a device that uses the principles of biotechnology to perform deodorization treatment. Its principle is to use the metabolic activity of microorganisms to decompose, transform and remove odorous substances. Biological deodorization distribution cabinets usually include a biological filter and an electrical control system. The exhaust gas first enters the biological filter, which is filled with a large amount of biological filter materials, such as activated carbon, biological ceramsite, etc. These biological filter materials provide a good growth environment, adsorbing and immobilizing a large number of microorganisms. When the exhaust gas passes through the biological filter, the odorous substances in it are adsorbed on the surface of the biological filter material. Microorganisms grow and reproduce on the biological filter material and use the odorous substances adsorbed on the surface as a nutrient source to carry out metabolic activities. In this process, microorganisms convert odorous substances into harmless substances through reactions such as decomposition, transformation and oxidation, thereby achieving the deodorizing effect. An electrical control system is used to monitor and control the operation of the biofilter. It can monitor the temperature, humidity, odor concentration and other parameters of the exhaust gas, and adjust the ventilation volume, moisture, temperature and other conditions of the biological filter as needed to ensure the activity of microorganisms and the stability of the growth environment. The biological deodorization distribution cabinet has the advantages of good deodorization effect, high processing efficiency, and small equipment size. It is widely used in odor treatment in garbage treatment plants, sewage treatment plants, kitchens, public toilets and other places.