Ga. Biofilters take airborne emissions from the plant and push them through a box filled with packing material, such as wood shavings or ceramic balls.
Bacteria grow on the packing material, and then they eat and remove most of the odorous chemicals.
Georgia's rules for controlling and assessing malodors from food waste rendering plants could become a model for other states facing the same problem. Meanwhile malodor control and assessment remains a complicated task. The problem of malodors from rendering plants is a longstanding issue. In fact, the industry dates back to Roman times. Instead, it's turned into usable byproducts.