Présentation de la Station d'épuration de Bourgoin-Jallieu

The video presents the wastewater treatment station of Bourgoin-Jallieu, established in 2012 to replace an older facility that no longer met quality standards. This modern station was designed to accommodate future urban development while protecting the ecological environment, particularly the Labourbre river, in line with European water directives.

Key Scientific Concepts and Processes:

• Wastewater Types:
  • Domestic Effluents: Wastewater from homes containing organic matter, grease, soaps, and detergents.
  • Industrial Effluents: Wastewater from industrial and artisanal activities, requiring specialized treatment.
• Treatment Capacity:
  • Average inflow of 600 m³/hour (equivalent to 3,000 bathtubs).
  • Maximum capacity of 2,900 m³/hour (equivalent to 14,500 bathtubs).
• Treatment Process:
  • Pre-treatment:
    • Stripping: Removal of harmful gases through aeration.
    • Coarse Screening: Removal of objects larger than 3 cm.
    • Fine Screening: Removal of waste larger than 3 mm.
  • Oil and Sand Removal: Separation of grease and sand to prevent equipment damage.
  • Lamella Decanter: Traps suspended fine particles through gravity.
  • Biological Treatment:
    • Bacterial Bed: Bacteria attach to plastic strips, consuming pollutants.
    • Aeration Basin: Provides oxygen for bacteria to break down carbon and nitrogen.
    • Clarifier: Separates biological sludge from treated water through decantation.
  • Final Water Quality Monitoring: Continuous sampling and analysis of inflow and outflow to ensure compliance with ecological standards.
  • Sludge Treatment:
    • Dehydration of sludge using centrifuges, producing 150 tons of dehydrated sludge monthly for composting.
  • Odor Control:
    • Three-stage deodorization process using active carbon filters, acidic water, and biological treatment.
  • Monitoring and Control: Centralized control station with real-time monitoring of 650 pieces of equipment.

Researchers and Sources Featured:

• CAPI (Urban Community of Porte de l'Iser)
• Rô Méditerranée and Corsica Water Agency
• General Council of Isère
• Independent laboratory for additional studies
• Water police service for regulatory compliance.