The polluted air stream is humidified before entering the biological reactor. The pollutants then contact with the filter media where they transfer from the air phase to the water phase. The water phase is represented by a thin biological film surrounding each media particle. Here, the bacteria produce an enzyme which acts as a catalyst to begin breaking the chemical pollutants down through the oxidation pathway with the final emissions consisting of Carbon Dioxide and Water.

PPC Biofilter provides a pretreatment system to condition the gas stream for optimum biological parameters. This includes temperature conditioning, humidification and particulate removal. The gas stream then flows into a fixed media reactor where the phase transfer and biological oxidation takes place.

The reactor is designed to protect the biology from the elements (rain, snow, wind, sun) and to consistently control the environment (moisture control) of the filter media, to achieve maximum removal performance.