Step 2: Improve our environmental impacts


waste-culletWaste: The Waste policy of Saint-Gobain Glass consists in searching for and developing all local ways of recovering waste, in order to reduce the quantities land-filled and reach the objective of the Saint-Gobain charter, namely "Zero non-recovered waste".

In Saint-Gobain Glass facilities, since glass-making scrap is not considered as waste but as secondary raw materials, this is sorted and managed with great care. Most is recycled internally in the form of cullet.

CulletCullet: There are 3 types of cullet, depending on their origin:
  • Internal cullet: broken glass coming from manufacturing glass, reintroduced into the original process
  • "Pre-customer" cullet: broken glass coming from processing, before implementing the finished product.
  • "Post-consumer" cullet: broken glass coming from the end-of-life stage, after collection, sorting and treatment.
Currently, on average 30% of the total weight of a sheet of glass made by Saint-Gobain Glass comes from recycled internal cullet and "pre-customer" cullet. More than 1 500 000 tons of cullet are melted each year in 36 furnaces. This enables:
  • A reduction of 1 800 000 tons of raw materials (natural resources) consumed,
  • A reduction of at least 375 000 tons of CO2 emitted, which results in significantly capping the greenhouse effect caused by greenhouse gas emissions. The technical limit to incorporating cullet into glass manufacturing has by no means been reached. This question however goes beyond the scope of our sector of activity. There is an unquestionable market opportunity if the collection and treatment channels were set up to collect glass from demolition sites, treat it and recycle it in flat glass furnaces.
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