Bio-odor Elimination BoxHigh surface area biofiller for microbial adhesion and growth, allowing microorganisms to form a biofilm on the biofiller surface in a suitable environment. The microorganisms in 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 substances such as water, carbon dioxide, minerals, etc., achieving the purpose of VOCs purification treatment.