Biotrickling filters are considered to be the
next development for animal housing
since they are easier to manage and are
smaller in size compared to other exhaust air
filtration technologies. Various configurations of
biotrickling filters and bioscrubbers have been
studied and showed a very good potential for
controlling emissions from pig buildings. A number
of operating conditions have been specified
for biotrickling filters (Deshusses and Gabriel,
2005). Design values have been suggested for
bed height, bed cross-sectional area, packing
nominal size, empty bed residence time (EBRT),
pressure drop, air temperature, liquid recycle
rate, pH of the recycled liquid, and some typical
control parameters. However, further work is
needed in order to realize the best design that will
perform effectively when installed in actual swine
production facilities.