The sorting center

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Extraction of secondary raw material © Séché Environnement.

Extracting secondary raw materials

Our latest-generation sorting center enables us to respond to and support local authorities' proactive approach to waste prevention and recovery.

By opening a sorting center in 1997, Séché Éco-Industries provided the region with the technical solution for managing this packaging waste.
Packaging waste, whether produced by households or by economic activity
economic activity, contain resources that the site recovers for reuse
so that they can be reused instead of raw materials: they become
secondary raw materials, which are then sent for recycling.
Once sorted, the materials are baled and transported to the recyclers.

Elements with high energy potential are extracted from the sorting rejects and used to produce Solid Recovered Fuel (SRF).

CSR is used at the Environment Division in a specially adapted boiler furnace to produce a new energy resource.

Key figures

30 000
Tons/year
of separate collection waste

Mechanization of sorting operations

How does the sorting center work?

The Tromel

The Trommel is a cylindrical-shaped sieve that sorts waste according to size thanks to a rotating system.

The Trommel is a cylindrical-shaped sieve that sorts waste according to size thanks to a rotating system.

The handles

Installed at the beginning of the line, the Griffe performs continuous separation of flexible films, plastic bags and other objects presenting a risk of snagging.

Installed at the beginning of the line, the Griffe performs continuous separation of flexible films, plastic bags and other objects presenting a risk of snagging.

Diagram of a sorting center claw. © Séché Environnement
Diagram of a sorting center claw. © Séché Environnement

The screen

The screen sorts mixed waste into three different fractions. Light, flat bodies such as film or packaging end up in the upper part of the separator. Heavy, three-dimensional waste rolls to the bottom of the machine. The smallest pieces of waste are screened by the separator’s grids.

The screen sorts mixed waste into three different fractions. Light, flat bodies such as film or packaging end up in the upper part of the separator. Heavy, three-dimensional waste rolls to the bottom of the machine. The smallest pieces of waste are screened by the separator’s grids.

Diagram of the sorting center screen © Séché Environnement
Diagram of the sorting center screen

Overband

The overband is placed on top of a conveyor and is used to carry ferrous particles away from the conveying line. Under the effect of magnetic attraction, the ferrous bodies are attracted and separated from the bulk

The overband is placed on top of a conveyor and is used to carry ferrous particles away from the conveying line. Under the effect of magnetic attraction, the ferrous bodies are attracted and separated from the bulk

Overband at the Changé sorting center © Séché Environnement
Overband at the Changé sorting center

Optical sorting

Thanks to visual and spectrometric recognition (shape/color), waste is directed onto the right belt according to the force of the compressed air jet.

Thanks to visual and spectrometric recognition (shape/color), waste is directed onto the right belt according to the force of the compressed air jet.

Optical sorting diagram © Séché Environnement
Optical sorting diagram

Eddy current

This device separates non-ferrous metal packaging (aluminum, zinc, copper…) from other packaging, including ferromagnetic packaging.

This device separates non-ferrous metal packaging (aluminum, zinc, copper…) from other packaging, including ferromagnetic packaging.

Current Foucault diagram © Séché Environnement
Current Foucault diagram

Sorting operators

The last essential link in the sorting chain, operators check the work of the machines and carry out quality control. There’s no substitute for the human hand when it comes to removing intruders

The last essential link in the sorting chain, operators check the work of the machines and carry out quality control. There’s no substitute for the human hand when it comes to removing intruders

Sorting center operators © Séché Environnement
Sorting center operators

Energy production

Depuis septembre 2017, la Ville de Laval dispose du tout premier réseau alimenté par un combustible spécialement préparé à partir de déchets jusque-là non valorisables. Ce réseau alimente en chauffage l'équivalent de 6 400 logements dans différents quartiers de la ville.

Waste storage

A historical activity at the Changé site, the non-hazardous waste storage facilities, provide a high environmental quality solution for their safety.

Preserving biodiversity

Séché Éco-Industries' Environment Division in Changé has made biodiversity a major component of its corporate strategy.

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