Overview: Uses microbial degradation to treat malodorous gas; composed of shell, bio-media, air distribution, spray and exhaust systems, sized by airflow.
Principle: Adsorption → microbial degradation (odorous substances used as C/N source → CO₂, H₂O, N₂) → compliant discharge.
Applications: Municipal WWTP, transfer stations, landfill leachate, pharma/chemical/feed/food, livestock, restrooms; >95% for NH₃/H₂S.