NOTHING LIKE IT ON THE MARKET EXCEPT EXPENSIVE BIOFILTERS: Step 7: Biofilters — Drawing exhaust air through a biofilter bed can reduce odor, ammonia, hydrogen sulfide and dust. Like any odor-curbing technology, the biofilters must be managed properly, particularly the moisture content. Odor levels can be reduced 65-80% at an estimated cost of about 42¢/finished pig.
Precautions must be taken to ensure the biofilter design is compatible with the ventilation system. Whole-house ventilation through a biofilter is not practical, he explains.
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