Effect of Biofilter Retention Time on Emissions from Dairy, Swine and Poultry Buildings
نویسندگان
چکیده
The performance of twelve biofilters with three different residence times (approximately 4 s, 7 s, and 13 s) was measured on a dairy, swine, and poultry facility. Odor and hydrogen sulfide reduction improved from 56% to 94% as residence times increased from 4 s to 7 s for the dairy and swine. Percent reduction remained above 89% as residence time increased from 7 s to 13 s on the dairy and swine. A 5 s residence time is recommended for designing biofilters on swine and dairy facilities to acheive more than 80% reduction in emissions. The biofilter on the poultry facility was installed without a dust filter and dust on the fans prevented accurate airflow measurement. Reductions were less than 40% on the poultry. Biofilters on poultry facilities are not recommended without dust removal.
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