Anaerobic Digestion done right

A biogas facility typically has two or more cylindrical digesters with heating pipes integrated into the walls and floor. The walls are insulated and clad with weatherproof panels. The digesters are built above ground to reduce problems if the area should flood, and their cylindrical shape ensures maximum engineering and thermal soundness.

Biogas Energy digesters are covered with double-membraned roofs that protect from the elements, allow easy access to the digester's contents, and contain built-in gas storage. The roof's outer membrane has withstood harsh Northern winter climates for over a decade, while the inner membrane expands and contracts as a built-in gas holder for hours of biogas production.
Between the two membranes an air blower maintains pressure to give the outer membrane its stability while applying pressure to the gas storage. By including gas storage as standard equipment, we reduce costs and gain considerable energy production efficiencies.
If an issue arises within the digester, the roof can be unhitched and folded back to give instant access; impossible with a steel or concrete roof. This ease of access means repairs take a few minutes, not days, so downtime is reduced to a minimum. As lagoon digesters prove dangerous where there is flooding in the area, Biogas Energy tank digesters provide disaster management. No loss of manure; no contamination of local water.

The contents of each tank are mixed with either submerged agitators or external pumps to foster optimal bacterial proliferation and ensure steady, reliable methane production. The agitators adjust automatically or manually and ensure a complete, pervasive mix of substrate for an optimized climate for bacterial proliferation and pathogen treatment. Should an agitator require repair or replacement, it's simply matter of folding back the roof, lifting out the unit, and replacing it in minutes. Unlike digesters with concrete roofs or central mixing devices, there is minimal downtime and no loss of operations

After desulphurization, the biogas is converted into electrical and thermal energy in a combined heat and power (CHP) unit, also called a cogeneration unit. All of the facility's equipment, including the digester heating, runs on power generated by the CHP unit. Surplus electricity (typically 95% of the amount generated) is fed into the public grid and sold to the local power utility. Surplus heat can be used to heat homes or buildings as well as for agricultural and industrial processes that require significant heat.

The Biogas Energy digester design processes high-liquid/high-energy feedstocks like glycerin or grease, and it can also proces high-solids feedstocks like food scraps and green waste.
Don't box yourself in with the limited functionality of a "dry" digester or lagoon. Build a system that can expand as you do.

Contact us to learn more.