Advanced anaerobic digestion of municipal sludge with integrated biological hydrolysis – Digelis^® BH

The two-stage digestion systems are among the advanced anaerobic digestion solutions that reduce overall volume while maintaining or improving biogas production. In addition, under certain conditions, these systems can also produce hygienized sludge in accordance with U.S. EPA Rule 503 for the production of Class A biosolids.

SUEZ's range of anaerobic digestion products with biological hydrolysis offers two possible configurations, combining a first mesophilic or thermophilic phase with a second mesophilic phase.

• Digelis^® BH : Anaerobic digestion in acid/gas phases

Both steps are carried out under mesophilic conditions (37°C).

• Digelis^® BH_A :Temperature-Phased Anaerobic Digestion (TPAD)

This solution operates in a draw-and-fill batch mode, producing sanitized sludge that meets U.S EPA Class A biosolids standards or equivalent.

key figures

• Up to 40% reduction in digester volume
• 100% energy-neutral solution

among our references

• Aix La Pioline (France) – 175,000 PE (Digelis^® BH)
• Nice Haliotis II (France) – 680,000 PE (Digelis^® BH) – under construction
• Okhla (Inde) – 3,500,000 PE with advanced heat recovery (Digelis^® BH_A) - under construction