Landfill gas ingredients and gas compound static and dynamic concentrations were measured on 5 landfill sites before revegetation using installed gas monitoring wells.
Providing 8 hour long continous pumping with 34-71 L/min gas analysis in each hour was carried out.
Based on the analytical data we classified the landfill sites into 3 categories:
I. Landfills with deep and well compacted waste material and compacted upper soil layer. Production of methane is continous, in significant amount and concentration. Long term pumping has no or only very limited effect on metahane generation At he end of pumping methane concentration is still 45-50 v/v % and stabile.
II. Landfills with shalower waste material layer, methane generation is continous producing relatively significant amount and concentration, but long term pumping can reduce methane concentration down to 35-45 v/v%.
III. Landfills with shallow waste material layer with less organic compounds, methane generation is continous but producing very small amount, long term pumping decreases methane concentration quickly down to 10-25 v/v%.
