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Expansion of the Valoris technical landfill site

The expansion of the Valoris technical landfill site, carried out by the gbi team, consists of creating a new cell with a capacity of 248,060 m3 of residual materials and related works for the operation of all of the expansion near the old site having reached its capacity, all in compliance with the conditions of the ministerial decree and the Environmental Quality Act, within a tight deadline, while meeting multiple requirements.

Waste Management and Technical Landfills
Engineering, Project design and supervision
Civil, Electricity

Technical challenge

New infrastructures independent of existing cells have been designed, which is an unusual approach for this type of project. Valoris wanted a passage between composting infrastructures and a former sanitary landfill site (LES) closed for more than 15 years, imposing significant constraints. To achieve this passage, the team had to level and backfill the land, requiring a thorough analysis of high and low points in order to avoid air and water problems in the pipes. The design must prevent the formation of clogged sections due to biogas condensation, which requires careful adjustments, all without excavation in the LES waste bed.

  • 55 000

    tons of waste per year

  • 800

    meters of discharge pipe under pressure, without excavation

  • 50

    years of projected sustainability

The project was subject to tight time constraints, with a deadline set at the end of June 2023 for the start-up of the new site. The need to deliver a functional site within 365 days was a major challenge. gbi successfully commissioned the new cell as planned, demonstrating effective management of the project and winter works.

gbi's mandate integrated a proactive vision for biogas management, with anticipation of the collection of the latter during cell operation and planning for the addition of an additional flare. The client is considering the valorization of biogas for the creation of energy in the future years. Thus, the infrastructure was designed for the future production of renewable natural gas from biogas.