COMPARISON OF A TUNABLE DIODE LASER APPROACH WITH STATIC CHAMBERS FOR DETERMINATION OF SURFACE METHANE EMISSION
Increasingly there is a need to determine methane emission rates from landfills. These determinations are needed for greenhouse gas inventories, for constraining estimates of emissions of non-methane organic compounds and for determining the efficiency of gas collection systems. Measurement campaigns to determine methane emissions from landfills are not overly common although a number of studies have been published, frequently using static chambers as a measurement vehicle (Bogner et al., 1997a, b, 1993). The disadvantage of this approach is that it is time consuming and requires a large number of measurements to constrain estimates from large landfill surfaces. The chamber approach also will not detect emissions from above the soil surface which might be due to leaky gas plumbing fixtures.
A comparison of two approaches for the measurement of methane emissions from landfills was conducted. An optical remote sensing tunable diode laser approach was compared with static chambers placed on a grid at a landfill in north Florida, USA. The studied landfill is closed, with a synthetic geomembrane top liner overlain by 60 cm of well-vegetated clay. The landfill had an active gas extraction system. In addition to the gas wells, the geomembrane cover was penetrated by leachate circulation pipes. Methane emission was concentrated near these penetrations in the cover and was generally zero in soil covered areas away from these wells and pipes. The laser method yielded results between 17.7 to 35.4 g CH
| Copyright: | © IWWG International Waste Working Group | |
| Quelle: | Specialized Session F (Oktober 2007) | |
| Seiten: | 8 | |
| Preis inkl. MwSt.: | € 8,00 | |
| Autor: | Jeff Chanton  Gary Hater Dr. C. Douglas Goldsmith Roger B. Green Ph.D., P.E. Tarek Abichou | |
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Erneuerbaren Energien gehört die
Zukunft: Blockheizkraftwerke
für Energie aus Biomasse
