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Design and Evaluation of a Horizontal Airflow Biofilter on a Swine Facility

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  034051,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.15031) @2003
Authors:   E.M. Garlinski, D.D. Mann
Keywords:   Air pollution, biofilter, pig housing, odor control

A horizontal airflow biofilter was built to treat an airflow of 1.89 m3/s from a weanling room at the University of Manitobas research farm at Glenlea. The biofilter was built with an EBCT of 9 s which resulted in a biofilter with the design values of height of 3m, thickness relative to airflow of 1.5 m on both sides of a center air plenum, and a length of 1.8m with an expected pressure drop through the biofilter media of 140 Pa. The biofilter has operated for approximately 4000 h over the summers of 2002 and 2003 while being shut down for the winter of 2002. Settling of the media resulted in channeling of the biofilter when it was restarted in the spring of 2003, as well as a problem with the fan control, which resulted in reduced pressure and airflow to the biofilter. Both of these problems were addressed which resulted in greatly improved performance of the biofilter. Settling of the biofilter media might have resulted in stratification of the biofilter media as current results shown with an ANOVA analysis. This needs to be further investigated as the stratification resembles the different fill methods as well as the biofilter has been over watered for the past 500 h. When this biofilter design is scaled up, certain design issues need to be addressed as do not recommend building a commercial biofilter as this is designed.

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