Event Title

Framework for an automated multi-gas sensor system for long-term monitoring of regulated and greenhouse gas fluxes from animal feeding operations

Presenter Information

Kristen Yeager

Location

Eccles Conference Center

Event Website

http://water.usu.edu/

Start Date

3-29-2011 10:40 AM

End Date

3-29-2011 10:45 AM

Description

Public concerns for regulated and greenhouse gas (RGHG) emissions from animal feeding operations (AFOs) have continued to increase as population expansion encroaches on rural farming areas. Reduction of RGHG emissions is becoming a critical management strategy. To establish appropriate mitigation strategies, including developing gas emissions regulations for farming operations, an accurate gas emission monitoring system is a critical element for management. The primary mechanism for release of gaseous emissions is microbial decomposition of manure. The research primarily aims to develop an automated multi-gas sensor measurement system, based on solid state metal oxide sensors, for long-term measurements and monitoring of RGHG fluxes. The proposed target gases initially include NOx, NH3, CH4, H2S, and VOCs. A commercially available Ll-COR automated soil C02 flux system (LI-8100, LI-COR Biosciences, Lincoln, NE) will be modified to house the target gas sensors. Gas fluxes will be determined based on the gas concentration increase during a designated period of time within the chamber volume divided by the surface area of the chamber over the emission source. Considered as the primary mechanism for gas exchange and transport in porous media, Fick's laws are the most widely used approach in determining gas diffusion in free air (no porous media) and have been further applied for porous media conditions by consideration of the water content resulting in the effective gas diffusivity. Applying Fick's laws of diffusion, it is possible to estimate gas flux based on diffusive gas transport in porous media related to manure management in AFOs.

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Mar 29th, 10:40 AM Mar 29th, 10:45 AM

Framework for an automated multi-gas sensor system for long-term monitoring of regulated and greenhouse gas fluxes from animal feeding operations

Eccles Conference Center

Public concerns for regulated and greenhouse gas (RGHG) emissions from animal feeding operations (AFOs) have continued to increase as population expansion encroaches on rural farming areas. Reduction of RGHG emissions is becoming a critical management strategy. To establish appropriate mitigation strategies, including developing gas emissions regulations for farming operations, an accurate gas emission monitoring system is a critical element for management. The primary mechanism for release of gaseous emissions is microbial decomposition of manure. The research primarily aims to develop an automated multi-gas sensor measurement system, based on solid state metal oxide sensors, for long-term measurements and monitoring of RGHG fluxes. The proposed target gases initially include NOx, NH3, CH4, H2S, and VOCs. A commercially available Ll-COR automated soil C02 flux system (LI-8100, LI-COR Biosciences, Lincoln, NE) will be modified to house the target gas sensors. Gas fluxes will be determined based on the gas concentration increase during a designated period of time within the chamber volume divided by the surface area of the chamber over the emission source. Considered as the primary mechanism for gas exchange and transport in porous media, Fick's laws are the most widely used approach in determining gas diffusion in free air (no porous media) and have been further applied for porous media conditions by consideration of the water content resulting in the effective gas diffusivity. Applying Fick's laws of diffusion, it is possible to estimate gas flux based on diffusive gas transport in porous media related to manure management in AFOs.

https://digitalcommons.usu.edu/runoff/2011/Posters/8