Séché Environnement inaugurates a unique specialty gas treatment facility at the Trédi site in Saint-Vulbas, France

The long-standing Trédi site (a subsidiary of the Séché Environnement Group) in Saint-Vulbas has been active in the region for over 40 years and has forged a global reputation for its expert skills in managing hi-tech hazardous industrial waste, such as treating industrial gases.

The Group is now reinforcing that unique expertise in Europe by developing a treatment facility for specialty and greenhouse gases, which are known for their involvement in global warming.

These specialty gases are used by local authorities as well as the gas, chemical and microelectronics industries. Due to their hazardous nature or potential greenhouse effect, considerable expertise is required to handle, store and process them in a manner that is safe for people and the environment

A specific treatment process with appropriate equipment, unique infrastructures, and trained and qualified personnel. The steps in the treatment process are as follows:

1. After analyzing the condition of the cylinders, which is important for determining the safest handling and transportation methods, good condition cylinders are stored and secured in cages. Any cylinders in poor condition are kept in an airtight sarcophagus (emergency packaging) until treatment.

2. Cylinders are unloaded in a depressurized building (-50 pascals), weighed, labeled and placed in storage buildings according to the specific type of gas.

3. Technicians wearing the appropriate PPE sample and analyze the contents of the cylinders in an initial enclosed cabin that has been depressurized to contain any potential leaks.

4. Once the contents have been characterized, the cylinder is connected, emptied and rinsed in a second cabin.

5. The extracted gas is thermally eliminated in a facility using a secure double-walled line.