DX-ADBiogas / Digester
Digestax Anaerobic Digester
Mesophilic and thermophilic digesters with methane-tight GFS roofs.
- Capacity
- Mesophilic 95 °F · thermophilic 131 °F
- Payload
- Sludge / biomass · CH₄-saturated headspace
- Lead time
- 16 weeks
- Coating
- Digester Olive RAL 6003
- Service life
- 40+ years warranted
- Since
- 2003
Design intent
The system, in one paragraph.
Digestax is a complete anaerobic digester envelope — tank, double-membrane biogas roof, insulation jacket, and heating coil pack — built around a glass-fused-to-steel shell fired to survive the biogas corrosion triad: H₂S, CO₂, and saturated water vapor at 105 °F. The fused enamel is continuous from liquid phase into the headspace and through the bolted flange that seats the PVC-coated polyester gas holder. Our integrated mixing (slow gas recirc, draft tube, or lateral mechanical) is plumbed through SS-316 nozzles with sacrificial sleeves at every shear point. Every Digestax ships with CFD-modeled residence-time curves for the operator's QA file.
Specification
Governing values.
Published specifications reflect the base fused-envelope configuration. Application-specific deviations — nozzle pattern, gasket compound, coating color — are documented in the commissioning binder signed at hydrotest.
- Operating mode
- Mesophilic · thermophilic retrofit
- Headspace
- Double-membrane EPDM/PVC gas holder
- Heating
- Integrated SS-316 coil · 145 °F supply
- Mixing
- Gas recirc · draft tube · or mechanical
- H₂S tolerance
- 4,500 ppm gas · unlimited liquid
- Insulation
- 4" PIR · cladded · U ≤ 0.28 W/m²K
Applications
Where we see it.
- WWTP sludge digestion
- Agricultural biogas
- Food-waste co-digestion
- Industrial FOG
Certifications on file
EN 1090-1 EXC3AWWA D103-19CE PED 2014/68/EUATEX Zone 2 gas
Warranted lifetime
40+ years
Coating service life is warranted — not estimated. No recoats, no refurbishment, no scheduled interior paint. The glass that leaves our furnace is the glass that retires with the tank.