Biofilter
（重定向自Biofiltration）
![Biosolids composting plant biofilter mound - note sprinkler visible front right to maintain proper moisture level for optimum functioning](/Images/godic/202412/24/CVRD5biofilter.air.exhaust4732.jpg")
![Air cycle system at biosolids composting plant. Large duct in foreground is exhaust air into biofilter shown in next photo](/Images/godic/202412/24/CVRD4chamber.air4732.jpg")
![A typical complete trickling filter system for treating wastewaters.[3]](/Images/godic/202412/24/Trickle_Filter.svg4732.png")
![Image 1: A schematic cross-section of the contact face of the bed media in a trickling filter.](/Images/godic/202412/24/Trickle_Filter_Cross-section4732.png")
Biofiltration is a pollution control technique using living material to capture and biologically degrade pollutants. Common uses include processing waste water, capturing harmful chemicals or silt from surface runoff, and microbiotic oxidation of contaminants in air.