Reference in the dairy processing industry: cheese dairy (12)

Problem / oppotunity 

• Expansion of the cheese dairy and extension of the existing methanisation unit built by VALBIO in 2010
• From 2 million to 5 million litres of milk processed per year
• Regulatory obligation to purify effluents:
  • White water: 7.5 million litres / year
  • Whey: 3.5 million litres / year

Solution :

• Expansion of pre-treatment facilities
• Methanisation of effluents using VALBIO METHACORE® technology – Replacement of the 2 existing 55 m3 digesters by 2 140 m3 digesters
• Biogas used in the existing boiler to produce the hot water needed to make cheese
• Expansion of the aerobic finishing treatment
• Extension currently under construction

Result of methanisation :

• 270,000 m3 of biogas produced per year
• 1,500,000 kWh / year
• Purification efficiency:
• DCO: 95%  BOD: 95%.