Biogas collection

At landfill sites, the biogas emanating from the biodegradable fraction of waste has to be pumped through a degasification network sited within the mass of waste.

Biogas pumping requires:

  • the installation of condensate collection systems;
  • accurate monitoring of various parameters (pressure, depression, air vacuum, etc.);
  • analysis of the CH4 (methane) content in the biogas.

Depending on the final use of the biogas (incineration or recovery), the pumping rate can be regula-ted to provide gas, the content of wich is tailored
to the application.

Incineration

After collection, the biogas can be eliminated by incineration in a flare, chosen on the basis of the applicable standards for exhaust gases. The temperature of the flame, the residence time and the measurement and regulation systems are also adapted to these standards.

Cogeneration

Biogas can be used in energy recovery facilities, where motors or gas turbines are coupled with an alternator to produce electricity and heat.

The generated heat can be used in an industrial process or in heating of buildings, greenhouses, swimming pools, etc. The installation of cogeneration systems offers a response to electrical and thermal energy requirements, either for on-site consumption or for re-injection into the energy network.

Anaerobic digestion or biomethanation

Biomathanation consists in treating the biomass in an anaerobic (digester) to produce biogas, which can the be injected into a cogeneration system, into the distribution network, or even used as fuel.