Dynamic simulation of Ammonia Concentration and Emission within swine barns: Part II. Model calibration and validation

E. L. Cortus, S. P. Lemay, E. M. Barber

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Model calibration and validation are critical components in developing a useful model for simulating ammonia production in grower-finisher swine barns. Data were collected from two partially slatted grower-finisher rooms to use as input data to the Ammonia Concentration and Emission Simulation (ACES) model and for calibration and validation purposes. Ten 3-day data sets were used during calibration of the volatile fraction of total ammoniacal nitrogen in the slurry, the air exchange rate through the slatted floor, the fouled floor area, and the urease activity factor. The remaining twenty 3-day data sets were used during model validation. The biases in the ACES simulations for hourly room and pit headspace ammonia concentrations were-1% and 10%, respectively, and 2% and 11% for 3-day average concentrations in the room and pit headspace areas, respectively. The ACES model and data collected suggest that the emission from urine puddles on the floor surface can account for the majority (>95%) of total ammonia emission from a room with low (<7) slurry pH properties.

Original languageEnglish (US)
Pages (from-to)925-938
Number of pages14
JournalTransactions of the ASABE
Volume53
Issue number3
StatePublished - May 1 2010

Keywords

  • Ammonia Concentration
  • Ammonia emission
  • Model calibration
  • Model validation
  • Modeling
  • Swine

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