With the number of LFG monitoring technologies out there, it can be difficult for operators to distinguish which is the best fit. The authors, Pat Sullivan and John Henkelman of Understanding Landfill Gas Monitoring Techniques, do just that, help readers find the approach that works best for their landfill monitoring needs.
Methane can be monitored above the surface of the landfill as a gauge of potential emissions or can be directly measured using techniques that test for the rate or flux of emissions. The above-surface monitoring techniques for gauging potential emissions include surface emission monitoring, ground-based or low-altitude imaging and satellite and aerial imaging.
Landfill methane measurement is the direct measurement of methane emissions from landfills. Direct measurement of methane is more expensive than surface emission monitoring. Four ways to measure landfill methane directly are flux chamber testing, plume measurement, micrometeorological methods, and dispersion modeling.