Proceedings available at: http://www.extension.org/67675
A 1440 cu. ft. woodchip biofilter was designed and built to treat the air coming from the cool season fans of a 2,000 head swine finishing operation. Key lessons learned during construction included improvements for design coordination, materials, and labor. After installation, biofilter moisture, odor performance, and static pressures were monitored. Biofilter moisture required more sprinkling than expected, with two, one hour sprinkler runs a day not keeping up during hot, dry conditions. Dry bed conditions likely led to little effect found during odor monitoring. The biofilter does appear to filter dust quite effectively. High static pressures (>0.2 in. of water) developed more rapidly than expected and prompted closer monitoring.
Presented by: Crystal Powers