Biofiltration is a pollution control technique using living material to capture and biologically degrade process pollutants. Common uses include processing waste water, capturing harmful chemicals or silt from surface runoff, and microbiotic oxidation of contaminants in air.

Biofilter
Biofilter
Nitrifying biofilm acclimation to free ammonia in submerged biofilters. Start-up influence
Spatial distribution of heterotrophs and nitrifiers in a submerged biofilter for nitrification
Biofilters: flexible, reliable biological reactors
Influence of pH over nitrifying biofilm activity in submerged biofilters
Nutrient and sediment removal by stormwater biofilters: A large-scale design optimisation study
Behavior of biofilters for waste air biotreatment. 1. Dynamic model development.
Biofiltration Control of Hydrogen Sulfide 2. Kinetics, Biofilter Performance, and Maintenance
Biological nitrogen removal from municipal landfill leachate: low-cost nitrification in biofilters and laboratory scale in-situ deni...