APPLYING US EPA OTHER TEST METHOD 10 WITH OPEN-PATH TUNABLE DIODE LASER ABSORPTION SPECTROSCOPY FOR MEASURING TOTAL METHANE EMISSIONS IN A LANDFILL

Optical Remote Sensing (ORS) is a powerful technique for measuring air contaminant emissions from fugitive area sources. Under the auspices of the U.S. Department of Defense’s (DoD) Environmental Security Technology Certification Program (ESTCP) and the U.S. Environmental Protection Agency (EPA), a Radial Plume Mapping (RPM) methodology to directly characterize gaseous emissions from area sources has been demonstrated and validated, and a protocol has been developed and peer reviewed. This EPA “Other Test Method” was made available for use on the EPA website in July 2006. The RPM-based methodologies use ORS techniques to collect path-integrated concentration (PIC) data from multiple beam paths in a plane and combine these with optimization algorithms to map the field of concentration across the plume of contaminant. This test method currently describes two methodologies that can be applied for landfill emission characteriztion. The methodologies are independent of the particular path-integrated ORS system used to generate the PIC data.

This paper describes a recently developed method for mapping gaseous emissions from non-point pollutant sources as applied for quantifying total methane emissions from landfills. Optical Remote Sensing (ORS) is a powerful technique for measuring air contaminant emissions from fugitive area sources. Under the auspices of the U.S. Department of Defense’s (DoD) Environmental Security Technology Certification Program (ESTCP) and the U.S. Environmental Protection Agency (EPA), a Radial Plume Mapping (RPM) methodology to directly characterize gaseous emissions from area sources has been demonstrated and validated, and a protocol has been developed and peer reviewed. This EPA "Other Test Method" was made available for use on the EPA website in July 2006. The RPM-based methodologies use ORS techniques to collect path-integrated concentration (PIC) data from multiple beam paths in a plane and combine these with optimization algorithms to map the field of concentration across the plume of contaminant. The methodologies described in the test method are independent of the particular path-integrated-ORS system used to generate the PIC data. When only a few gas species are of interest, it may be more beneficial to employ PI-ORS instrumentation, such as the tunable diode laser absorption specroscopy (TDLAS). For landfills, a scanning TDLAS system (hardware and software) was developed to measure total methane emissions.



Copyright: © IWWG International Waste Working Group
Quelle: Specialized Session F (Oktober 2007)
Seiten: 7
Preis inkl. MwSt.: € 7,00
Autor: Mark Modrak
Gary Hater
Roger B. Green
E. Morris
Chase

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