Biological Deodorization BoxMicrobial biofilm-forming surface biofillers, which allow microorganisms to form a biofilm on the biofiller surface under suitable conditions. The microorganisms within the biofilm utilize inorganic and organic substances from the waste gas as carbon and energy sources, degrade malodorous substances to maintain their life activities, and convert the malodorous substances into odorless byproducts such as water, carbon dioxide, minerals, etc., achieving the purpose of VOCs purification treatment.