Covered Lagoon Anaerobic Digester System

• An impermeable floating geomembrane captures biogas and helps contain lagoon odors.
• Engineered perimeter anchoring, ballast and sealed penetrations support cover stability and gas collection.
• Rainwater collection and removal provisions help prevent excessive loading on the cover.
• Cover layout, inlet and outlet positions, and gas piping can be adapted to existing pig farm construction and manure transfer routes.
• Prefabricated membrane sections can simplify transport and site installation, subject to lagoon size and access conditions.

• Applicable feed: Suitable livestock manure slurry and organic farm wastewater, subject to feedstock assessment.
• Lagoon capacity and geometry: According to project requirements.
• Cover and liner materials: Customizable based on wastewater chemistry, UV exposure and design conditions.
• Gas collection and rainwater management: Designed for the lagoon layout and expected operating conditions.
• Heating, pretreatment and downstream treatment: Available upon request.
• Site design: Designed according to local climate, ground conditions and farm operations.

Can an existing manure lagoon be covered?
Potentially. Its containment, embankments, freeboard, pipe locations and available area must first be assessed.

Is a lagoon liner required?
Liner requirements depend on the existing lagoon condition, soil and groundwater conditions, and applicable project requirements. The floating cover and bottom liner perform different containment functions.

Does the digester make effluent ready for discharge?
No discharge quality is assumed. The effluent may need additional storage, nutrient management or downstream treatment to meet the intended reuse or discharge requirements.