Mitigation of multiple air emissions from swine buildings using corn cob biofilters

Neslihan Akdeniz, Kevin A Janni, Brian Hetchler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Biofilter media selection and moisture content fluctuations significantly influence biofilter performance. Media with significant amounts of small particles have higher static pressure drops which lowers airflow through the biofilter. Inadequate moisture can reduce biological activity and decrease filter efficiency. Too much moisture (following a watering or rainfall event) can plug media pores, restrict airflow through the media, produce anaerobic pockets and generate nitrous oxide (N2O). In this study, a naturally occurring adsorbent (diatomaceous shale) was tested to manage media moisture content. Also, corn cobs were tested as an alternative biofilter media because wood chips are expected to be less available in near future due to emerging emerald ash borer disease. Five 1 m x 1 m x 1 m biofilter cells were built to treat air from pit fan exhausts of a swine finishing barn. One biofilter cell was filled with wood chips and one was filled with corn cobs. Three other biofilters were filled with corn cobs mixed with 5, 10 and 15% (by volume) diatomaceous shale, respectively. Results showed that all of the biofilters were effective reducing H2S and NH3 emissions without generating N2O. The corn cobs were less dense and more porous than the wood chips and had lower pressure drop values. Adding 15% diatomaceous shale to the cobs helped manage media moisture and improved H2S and NH3 reduction efficiencies.

Original languageEnglish (US)
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2014, ASABE 2014
PublisherAmerican Society of Agricultural and Biological Engineers
Pages902-909
Number of pages8
ISBN (Electronic)9781632668455
StatePublished - Jan 1 2014
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2014, ASABE 2014 - Montreal, Canada
Duration: Jul 13 2014Jul 16 2014

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2014, ASABE 2014
Volume2

Other

OtherAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2014, ASABE 2014
CountryCanada
CityMontreal
Period7/13/147/16/14

Keywords

  • Biofilter
  • Corn cob
  • Emerald ash borer
  • Moisture
  • Swine

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