Anaerobic Digester Agitators (Biogas)
Zero-Leakage Mixing for Biogas Generation
A biodigester is not just a tank; it's a pressurized biological reactor. The success of biogas production depends on
keeping the entire biomass volume in homogeneous motion (avoiding temperature gradients and dead zones) while guaranteeing
100% gas tightness to prevent methane leaks.
🛡️ 100% Gas-Tight Sealing
Standard seals fail here. We use specific solutions for pressurized methane (approx. 50 mbar):
- Hydraulic Labyrinth Seals: Oil-filled barrier suitable for low pressure.
- Double Mechanical Seals (Plan 52/53): For high safety requirements, with an external pressurization system.
💥 ATEX Zone 1 Certified
The head space of a digester is a potentially explosive atmosphere (Methane). Our equipment is fully certified:
- Motors: Ex db IIC T4 Gb (Flameproof).
- Sensors: ATEX temperature (PT100) and oil level sensors in the lantern.
🌀 Breaking the "Crust"
Floating scum/crust reduces gas production. Our high-efficiency axial impellers generate a massive top-to-bottom loop that breaks the surface layer and prevents foam accumulation.
Installation Configurations
🏗️ Top-Entry Central (Standard)
Ideal for new digesters with a concrete roof. Requires long shafts (10-20m) and steady bearings to avoid vibration. We design specialized pendular shafts.
🔄 Side-Entry (Retrofit)
Perfect for existing steel tanks or when roof load is limited. Multiple side-entry mixers installed at angles generate a powerful horizontal spiral flow.
⚠️ Corrosion Alert: H2S (Hydrogen Sulfide)
Biogas contains highly corrosive H2S. Never use standard carbon steel inside the tank. All our wetted parts are manufactured in AISI 316L Stainless Steel or Duplex, with specialized epoxy coating on the lantern.
