Concrete, steel or fiberglass dome
The digester itself is a sealed chamber where organic waste undergoes anaerobic digestion, producing biogas and nutrient-rich digestate. The gas collects in the upper portion of the dome, displacing digestate into a separate storage tank.
Key Features:
High durability:Fixed dome systems are typically built to last 30 years or more due to their robust construction materials.
Large capacity:These systems offer larger capacities, catering to farms, businesses, and communities with higher organic waste volume.
Internal gas storage:Biogas is stored within the dome itself, simplifying gas handling and potentially offering higher pressure for larger applications.
Relatively high cost: Due to complex construction and materials, fixed dome systems have a higher initial investment compared to other options
Applications:
Large-scale farms and agricultural operations generating significant organic waste.
Industrial facilities or communities with high waste production and energy demand.
Remote locations where readily available skilled labor and materials for alternative systems might be limited.
