ABSTRACT
The ability of microorganisms to use different compounds of an organic and inorganic nature, as a source of building elements and energy, reduces greenhouse gas emissions from landfill sites. Microorganisms; especially bacteria growing in the porous material, which constitute landfill cover, and also the one living in the surface layer; decompose some of the compounds contained in landfill gas. As a result of this decomposition, called biodegradation, simple mineral and organic compounds, which are less harmful to the environment than parent compounds, are formed. The initiation of this process does not require special inoculation of the material. Biodegradation of LFG components occurs spontaneously because these microorganisms are widespread in the environment. However, the creation of optimal conditions for their growth, by skilful selection off filling material, or the amount of incoming substrate increases the use of their abilities. It is also possible to introduce specialized microorganisms into the material, in which biodegradation takes place, which leads to the increase of the process rate or enhanced the efficiency of contamination removal.
