INNOVATIVE ANIMAL MANURE TREATMENT TECHNOLOGIES FOR ENHANCED ENVIRONMENTAL QUALITY
Location: Coastal Plain Soil, Water and Plant Conservation Research
Title: Path integrated optical remote sensing technique to estimate ammonia and methane gas emissions from CAFOs
Submitted to: Air and Waste Management Annual Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: May 29, 2007
Publication Date: September 16, 2007
Citation: Ro, K.S., Hunt, P.G., Johnson, M.H., Szogi, A.A., Vanotti, M.B. 2007. Path integrated optical remote sensing technique to estimate ammonia and methane gas emissions from CAFOs. In: International Symposium on Air Quality and Waste Management for Agriculture, 16-19 September, Broomfield, Colorado. 7 p. 2007 CDROM.
The U.S. EPA recently demonstrated the open-path optical remote sensing technology to identify hot spots and estimate mass flux of fugitive gases from closed landfill. The objective of this research is to validate this technology for estimating ammonia and methane emission from concentrated animal feeding operations (CAFOs). The technology utilizes the vertical radial plume mapping (VRPM) method, which reconstructs a vertical plume map based on several path-integrated concentrations of fugitive gases measured with open-path optical instruments. The mass flux of fugitive gas is then estimated by multiplying the vertical plane-integrated concentration by the averaged wind speed components normal to the vertical plane. The experimental system consists of an open-path tunable diode laser CH4 detector (Boreal Laser) mounted on an automatic positioning device, a 10-m weather mast, wind sensors, and integrated VRPM software (Arcadis Inc., NC). This method measured the methane emission rate from a distribution source with good accuracies.