Biofiltration is an air pollution control technology. It is essentially a packed bed of particles in which microorganisms are immobilized on top of the packing particles called support medium. The contaminated air stream (pollutants such as ammonia, amines, hydrogen sulfide (H₂S), reduced sulphur compounds (RSC), and/or VOCs) is humidified and passed through the bed. There are minimal requirements for energy and raw materials and minimal waste production. In particular, biofiltration has become an accepted and mature technique for air pollution control with substantial industrial confidence. This is demonstrated by the exponentially increasing number of biofilters around the world. Biofiltration is successfully being used in a variety of applications in North America including wastewater treatment plants, food processing plants, composting & organics processing facilities, rendering plants, fertilizer plants and pulp & paper industries, for odour control, sewage air treatment, ATAD off gas treatment and VOC emission control (BTEX control).

Ambio Biofiltration Ltd., incorporated on January 14, 1993, is a Canadian company involved exclusively in odour control, and specializing in biofiltration. We were the first Canadian company to design and build biofilters as a major part of its work. We design, build, and maintain biofilters for a wide range of air pollution control applications, and offer consulting services in the field.