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Partial Biofiltration of Exhaust Air from a Hybrid Ventilated Deep-Pit Swine Finisher Barn
Applied Engineering in Agriculture
  • Steven J. Hoff, Iowa State University
  • Jay D. Harmon, Iowa State University
  • Lide Chen, Iowa State University
  • Kevin A. Janni, University of Minnesota–Twin Cities
  • David R. Schmidt, University of Minnesota–Twin Cities
  • Richard E. Nicolai, South Dakota State University
  • Larry D. Jacobson, University of Minnesota–Twin Cities
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A strategy for providing partial biofiltration of a critical minimum amount of ventilation air (CMVR) from a hybrid ventilated swine finishing facility was developed and tested. The CMVR, defined as the minimum treated exhaust air that suppressed nighttime curtain opening movement, was set at 81 m3 h-1 pig-1 with the intention of providing enough fan ventilation to suppress inlet curtain movement during stable atmospheres, providing biofiltering for a high percentage of exhaust air. Two side-by-side 300-head hybrid ventilated deep-pit swine finishing rooms were used for this research, one room as the control (CTL) with the other treatment (TRT). The TRT room was fitted with a wood-chip based biofilter for scrubbing the CMVR. In terms of total room emissions, the TRT room had an average odor emission 37% less than the CTL room. Ammonia emission was 58% lower for the TRT room as compared to the CTL room. The results presented indicate that a strategy of partial biofiltration can result in significant reductions in odor and ammonia emissions when applied to hybrid ventilated swine finishing barns.

This article is from Applied Engineering in Agriculture 25, no. 2 (2009): 269–280.

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American Society of Agricultural and Biological Engineers
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Citation Information
Steven J. Hoff, Jay D. Harmon, Lide Chen, Kevin A. Janni, et al.. "Partial Biofiltration of Exhaust Air from a Hybrid Ventilated Deep-Pit Swine Finisher Barn" Applied Engineering in Agriculture Vol. 25 Iss. 2 (2009) p. 269 - 280
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