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Monitoring Air Quality: Emissions and Odor From A Swine Finishing
Livestock Facility
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Total Confinement – Liquid Manure50 lbs to 300 lbs in 16 ?? weeks
Fan Ventilated Barn and Manure Pit
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Swine Barn Emission Measurements:
Determine emission rates: hydrogen sulfide, ammonia, and odor from each hog barn.
Measure exhausted ammonia concentration with gas detection tubes.
Determine odor emission rate by collecting a bag sampleof exhaust air for lab analysis by dynamic olfactometry.
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Agricultural Ammonia Emissions
• From livestock housing facilities• Manure storage areas• Manure and fertilizer application areas
– Ammonia nitrogen volatilizes (gas) emitted to atmosphere, deposited back to land and water.
• Atmospheric particulates cause haze: Human respiratory health issues
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Ammonia Monitoring Equipment
• Stationary tube on fan or
• Gas detection pump
– Both utilize gas detection tubes.
– Ammonia sensitive substance changes color.
– Height of color change = concentration over time.
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Ammonia Monitoring : Barn & Pit Fans
Indicator tube attached to pump draws known air volume across tube over time.
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Ammonia Monitoring : Barn & Pit Fans
Stationary diffusion tube attached to fan for a recorded time period.
Blue color = ammonia detection. Height = concentration.
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Agricultural Hydrogen Sulfide Emissions
• H2S is product of anaerobic decomposition of organic matter.
• Liquid livestock manure storage generates H2S.
• H2S is toxic: Human / animal health concerns
• Dizzy, headache, nausea @ 50 ppm.• Death from respiratory paralysis @ 1,000 ppm.• OSHA indoor workplace standard is 10 ppm for 8 hour
day.
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Jerome 631-X Hydrogen Sulfide Analyzer
H2S measured with a Jerome Meter, twice every 2 minutes for ½ hour.
Weather data gathered: wind speed, wind direction, air temperature, relative humidity and barometric pressure.
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Measuring Hydrogen Sulfide
At Barn Exhaust Fans and Manure Pit Exhaust Fans
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Livestock Facility Odor Emissions
• A mix of different gases, existing at low concentrations.
• Generated from any combination of manure, dust, decaying feed, etc.
• Odors evoke a wide range of physical and emotional reactions, both positive and negative.
• Many livestock facility odors are identified by surrounding neighbors as negative.
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Air Quality
•Oxygen >19.6%
•Carbon dioxide <0.3%
•Carbon monoxide <10ppm
•Ammonia <10ppm
•Inspirable dust <3.4mg/m3
Minimum ventilation must be increased if these parameters are not met.
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