Biological Deodorization BoxHigh surface area biological media with microorganisms attached and growing, allowing microorganisms to form a biofilm on the media surface in a suitable environment. The microorganisms in the biofilm utilize inorganic and organic substances in 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.