Modeling emissions of volatile organic compounds from silage

Sasha D. Hafner, Felipe Montes, Clarence Alan Rotz

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

2 Citations (Scopus)

Abstract

Volatile organic compounds (VOCs), a necessary reactant for photochemical smog formation, are emitted from numerous sources. Limited available data suggest that dairy farms emit VOCs with cattle feed, primarily silage, being the primary source. Process-based models of VOC transfer within and from silage during storage and feeding are presented. These models are based upon well-established theory for mass transport processes in porous media with parameters determined from silage properties using relationships developed for soils. Preliminary results indicate that VOC emission by advective flow of silage gas is generally insignificant compared to emission by surface convection and diffusion from within silage. VOC emissions are dependent upon silage properties, temperature, wind speed, and exposure duration, which have implications for measuring, predicting, and controlling VOC emissions from silage. Emissions appear to be co-limited by convection and diffusion; therefore, the EPA-style emission isolation flux chamber design previously used to measure VOC emissions from silage is not suitable for this task.

Original languageEnglish (US)
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009
Pages1895-1911
Number of pages17
StatePublished - Dec 1 2009
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2009 - Reno, NV, United States
Duration: Jun 21 2009Jun 24 2009

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009
Volume3

Other

OtherAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2009
CountryUnited States
CityReno, NV
Period6/21/096/24/09

Fingerprint

Volatile Organic Compounds
Silage
volatile organic compounds
silage
Convection
Smog
soil transport processes
cattle feeds
porous media
mass transfer
dairy farming
wind speed
exposure duration
Soil
Gases
gases
Temperature

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)

Cite this

Hafner, S. D., Montes, F., & Rotz, C. A. (2009). Modeling emissions of volatile organic compounds from silage. In American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009 (pp. 1895-1911). (American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009; Vol. 3).
Hafner, Sasha D. ; Montes, Felipe ; Rotz, Clarence Alan. / Modeling emissions of volatile organic compounds from silage. American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009. 2009. pp. 1895-1911 (American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009).
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Hafner, SD, Montes, F & Rotz, CA 2009, Modeling emissions of volatile organic compounds from silage. in American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009. American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009, vol. 3, pp. 1895-1911, American Society of Agricultural and Biological Engineers Annual International Meeting 2009, Reno, NV, United States, 6/21/09.

Modeling emissions of volatile organic compounds from silage. / Hafner, Sasha D.; Montes, Felipe; Rotz, Clarence Alan.

American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009. 2009. p. 1895-1911 (American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009; Vol. 3).

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

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N2 - Volatile organic compounds (VOCs), a necessary reactant for photochemical smog formation, are emitted from numerous sources. Limited available data suggest that dairy farms emit VOCs with cattle feed, primarily silage, being the primary source. Process-based models of VOC transfer within and from silage during storage and feeding are presented. These models are based upon well-established theory for mass transport processes in porous media with parameters determined from silage properties using relationships developed for soils. Preliminary results indicate that VOC emission by advective flow of silage gas is generally insignificant compared to emission by surface convection and diffusion from within silage. VOC emissions are dependent upon silage properties, temperature, wind speed, and exposure duration, which have implications for measuring, predicting, and controlling VOC emissions from silage. Emissions appear to be co-limited by convection and diffusion; therefore, the EPA-style emission isolation flux chamber design previously used to measure VOC emissions from silage is not suitable for this task.

AB - Volatile organic compounds (VOCs), a necessary reactant for photochemical smog formation, are emitted from numerous sources. Limited available data suggest that dairy farms emit VOCs with cattle feed, primarily silage, being the primary source. Process-based models of VOC transfer within and from silage during storage and feeding are presented. These models are based upon well-established theory for mass transport processes in porous media with parameters determined from silage properties using relationships developed for soils. Preliminary results indicate that VOC emission by advective flow of silage gas is generally insignificant compared to emission by surface convection and diffusion from within silage. VOC emissions are dependent upon silage properties, temperature, wind speed, and exposure duration, which have implications for measuring, predicting, and controlling VOC emissions from silage. Emissions appear to be co-limited by convection and diffusion; therefore, the EPA-style emission isolation flux chamber design previously used to measure VOC emissions from silage is not suitable for this task.

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Hafner SD, Montes F, Rotz CA. Modeling emissions of volatile organic compounds from silage. In American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009. 2009. p. 1895-1911. (American Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009).