The management of rubbish and particularly the final rubbish disposal in controlled dumps with a high level of compaction of the material allow the establishment of anaerobiosis conditions that are necessary for bio-gas production after the decom­position of the organic content which is present in the rubbish. The collection of the gas produced, which happens through appropriate cargo systems, is necessary not only for the exploitation of energy but also for safety reasons (methane, in addition to being harmful to humans and vegetation by its greenhouse gas effect, is explosive in confined environments).

The collector system comprises a series of vertical shafts from which horizontal cracked piping spiders originate. The collection and removal of the gas are controlled by the pressure to which it is subjected inside the body of the dump.

Biogas production phases

Biogas comp, (volume)

Time (not in scale)