Anaerobic Digesters – Distillery Wastewater Treatment (Italy)

Sector: Wastewater Treatment / Distillery
Client: Italy
Year of Completion: 2011
Units Supplied: 2 Anaerobic Digesters

Objective

Design, fabrication, and installation of two high-capacity anaerobic digesters for the biological treatment of process wastewater at a distillery site. The project involved advanced structural and material solutions to ensure durability, operational efficiency, and chemical resistance.

Technical Specifications

• Useful Volume per Unit: 6,000 m³
• Diameter: 22,000 mm
• Cylindrical Height: 18,900 mm
• Material Composition:

• Main shell: Carbon steel S275JR
• Top course and dome roof: Stainless steel AISI 304L
  • Wall Thickness: from 6 mm to 18 mm
  • Unit Weight: ~165 tons
  • Design: Flat bottom, spherical roof, outdoor installation

Key Strengths

• Large-scale tanks designed for high-load anaerobic digestion processes
• Mixed-material construction combining cost-effective carbon steel and corrosion-resistant stainless steel
• Spherical stainless-steel roof for optimized vapor management and extended lifespan
• Structural integrity under static and dynamic liquid loads
• Ideal solution for energy recovery from wastewater (biogas production)