| Biofilters are an effective technology in reducing odor and pollutant gas emissions from animal agriculture. Large horizontal biofilter media beds sometimes prevent application of this technology. Vertical bed biofilter are an alternative. Also, moisture content in a biofilter affects its pollutant removal efficiency. The research objectives were to develop a design for a vertical biofilter to achieve uniform airflow after media settling and test a biofilter moisture control system.; By sloping one wall of a vertical biofilter, uniform airflow can be achieved after media settling. A 9.6 degree wall construction produced the least airflow variation after media settling among the 0, 4.8, and 9.6 degree side wall slopes tested. Using a Watermark Electronic Module irrigation control system on a laboratory scale biofilter, moisture was kept above the desired minimum 40% moisture. |
